| EAA | Unassigned Prefix |
| EAB | BCBS of Kansas City |
| EAC | Anthem BCBS of Virginia (VA) |
| EAD | BCBS of Illinois (IL) |
| EAE | Regence BCBS |
| EAF | BCBS of Massachusetts (MA) |
| EAG | Capital Blue Cross of Pennsylvania (PA) |
| EAH | BCBS of Alabama (AL) |
| EAI | Anthem BCBS of Colorado (CO) |
| EAJ | Unassigned Prefix |
| EAK | Anthem BCBS of Ohio (OH) |
| EAL | Anthem BCBS of Connecticut (CT) |
| EAM | BCBS of Alabama (AL) |
| EAN | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| EAO | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| EAP | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| EAQ | Florida (FL) Blue |
| EAR | Unassigned Prefix |
| EAS | Blue shield(BS) of California (CA) |
| EAT | BCBS of Texas (TX) |
| EAU | Anthem BCBS of Colorado (CO) |
| EAV | BCBS of Texas (TX) |
| EAW | Unassigned Prefix |
| EAX | Unassigned Prefix |
| EAY | BCBS of Texas (TX) |
| EAZ | BCBS of Arizona (AZ) |
| EBA | Anthem Blue Cross(BC) of California (CA) |
| EBB | Unassigned Prefix |
| EBC | BCBS of Texas (TX) |
| EBD | Wellmark |
| EBE | Unassigned Prefix |
| EBF | Unassigned Prefix |
| EBG | BCBS of Kansas City |
| EBH | Capital Blue Cross of Pennsylvania (PA) |
| EBI | BCBS of Alabama (AL) |
| EBJ | Anthem BCBS of Wisconsin (WI) |
| EBK | Wellmark |
| EBL | Wellmark |
| EBM | Unassigned Prefix |
| EBN | Empire BCBS of New York (NY) |
| EBO | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| EBP | Unassigned Prefix |
| EBQ | BCBS of Illinois (IL) |
| EBR | Wellmark |
| EBS | Unassigned Prefix |
| EBT | BCBS of Louisiana (LA) |
| EBU | Highmark BCBS of Pennsylvania (PA) |
| EBV | Anthem Blue Cross(BC) of California (CA) |
| EBW | BCBS of Tennessee (TN) |
| EBX | Wellmark |
| EBY | BCBS of Illinois (IL) |
| EBZ | Blue shield(BS) of California (CA) |
| ECA | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| ECB | BCBS of Alabama (AL) |
| ECC | BCBS of Tennessee (TN) |
| ECD | Blue shield(BS) of Northeastern New York (NeNY) |
| ECE | BCBS of Mississippi (MS) |
| ECF | Unassigned Prefix |
| ECG | Anthem BCBS of Wisconsin (WI) |
| ECH | Anthem BCBS of Ohio (OH) |
| ECI | Unassigned Prefix |
| ECJ | Anthem BCBS of Ohio (OH) |
| ECK | BCBS of North Carolina (NC) |
| ECL | Anthem BCBS of Ohio (OH) |
| ECM | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| ECN | Anthem BCBS of Missouri (MO) |
| ECO | BCBS of Illinois (IL) |
| ECP | BCBS of Texas (TX) |
| ECQ | Unassigned Prefix |
| ECR | Anthem BCBS of Ohio (OH) |
| ECS | Anthem BCBS of Ohio (OH) |
| ECT | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| ECU | Blue Cross (BC) of Idaho (ID) |
| ECV | Anthem BCBS of Ohio (OH) |
| ECW | Unassigned Prefix |
| ECX | BCBS of Minnesota (MN) |
| ECY | BCBS of Texas (TX) |
| ECZ | BCBS of Texas (TX) |
| EDA | Anthem BCBS of Georgia (GA) |
| EDB | Anthem BCBS of Ohio (OH) |
| EDC | Florida (FL) Blue |
| EDD | Anthem BCBS of Georgia (GA) |
| EDE | Unassigned Prefix |
| EDF | Anthem BCBS of Wisconsin (WI) |
| EDG | Capital Blue Cross of Pennsylvania (PA) |
| EDH | Blue Cross (BC) of Idaho (ID) |
| EDI | Blue shield(BS) of California (CA) |
| EDJ | BCBS of Illinois (IL) |
| EDK | Unassigned Prefix |
| EDL | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| EDM | Premera BCBS of Alaska (AK) |
| EDN | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| EDO | Arkansas (AR) Blue Cross |
| EDP | BCBS Blue Care Network Michigan (MI) |
| EDQ | Unassigned Prefix |
| EDR | Unassigned Prefix |
| EDS | Florida (FL) Blue |
| EDT | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| EDU | BCBS of Alabama (AL) |
| EDV | Florida (FL) Blue |
| EDW | Anthem BCBS of Ohio (OH) |
| EDX | BCBS of Texas (TX) |
| EDY | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| EDZ | BCBS of Massachusetts (MA) |
| EEA | Unassigned Prefix |
| EEB | Florida (FL) Blue |
| EEC | BCBS of Illinois (IL) |
| EED | BCBS of Illinois (IL) |
| EEE | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| EEF | BCBS of Minnesota (MN) |
| EEG | BCBS of Alabama (AL) |
| EEH | Anthem BCBS of Ohio (OH) |
| EEI | Unassigned Prefix |
| EEJ | BCBS of Illinois (IL) |
| EEK | Unassigned Prefix |
| EEL | BCBS of North Carolina (NC) |
| EEM | Unassigned Prefix |
| EEN | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| EEO | Blue shield(BS) of California (CA) |
| EEP | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| EEQ | Wellmark |
| EER | Blue shield(BS) of California (CA) |
| EES | Florida (FL) Blue |
| EET | Unassigned Prefix |
| EEU | Anthem BCBS of Ohio (OH) |
| EEV | Unassigned Prefix |
| EEW | Anthem BCBS of Wisconsin (WI) |
| EEX | Capital Blue Cross of Pennsylvania (PA) |
| EEY | Empire BCBS of New York (NY) |
| EEZ | BCBS of Illinois (IL) |
| EFA | Anthem Blue Cross(BC) of California (CA) |
| EFB | Unassigned Prefix |
| EFC | Wellmark |
| EFD | Blue shield(BS) of California (CA) |
| EFE | Unassigned Prefix |
| EFF | Unassigned Prefix |
| EFG | BCBS of Minnesota (MN) |
| EFH | Unassigned Prefix |
| EFI | Highmark BCBS of Pennsylvania (PA) |
| EFJ | BCBS of Massachusetts (MA) |
| EFK | Wellmark |
| EFL | BCBS of Texas (TX) |
| EFM | Anthem BCBS of Colorado (CO) |
| EFN | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| EFO | Unassigned Prefix |
| EFP | Anthem BCBS of Georgia (GA) |
| EFQ | BCBS of Massachusetts (MA) |
| EFR | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| EFS | BCBS of South Carolina (SC) / Southcarolinablues |
| EFT | Unassigned Prefix |
| EFU | Anthem BCBS of Virginia (VA) |
| EFV | Unassigned Prefix |
| EFW | Anthem Blue Cross(BC) of California (CA) |
| EFX | Wellmark |
| EFY | Unassigned Prefix |
| EFZ | BCBS of Illinois (IL) |
| EGA | BCBS of Illinois (IL) |
| EGB | Highmark BCBS of Pennsylvania (PA) |
| EGC | Unassigned Prefix |
| EGD | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| EGE | Unassigned Prefix |
| EGF | Anthem BCBS of Ohio (OH) |
| EGG | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| EGH | Unassigned Prefix |
| EGI | Wellmark |
| EGJ | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| EGK | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| EGL | Anthem BCBS of Missouri (MO) |
| EGM | BCBS of Texas (TX) |
| EGN | Premera BCBS of Alaska (AK) |
| EGO | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| EGP | Blue shield(BS) of California (CA) |
| EGQ | Unassigned Prefix |
| EGR | BCBS of Texas (TX) |
| EGS | Unassigned Prefix |
| EGT | Unassigned Prefix |
| EGU | Regence BCBS |
| EGV | Unassigned Prefix |
| EGW | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| EGX | Unassigned Prefix |
| EGY | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| EGZ | Premera BCBS of Alaska (AK) |
| EHA | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| EHB | Unassigned Prefix |
| EHC | Unassigned Prefix |
| EHD | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| EHE | Unassigned Prefix |
| EHF | Anthem BCBS of Connecticut (CT) |
| EHG | Anthem BCBS of Maine (ME) |
| EHH | Anthem BCBS of New Hampshire (NH) |
| EHI | BCBS of Illinois (IL) |
| EHJ | BCBS of Massachusetts (MA) |
| EHK | Anthem BCBS of New Hampshire (NH) |
| EHL | Unassigned Prefix |
| EHM | Blue shield(BS) of California (CA) |
| EHN | BCBS of Nebraska (NE) |
| EHO | Horizon BCBS of New Jersey (NJ) |
| EHP | BCBS of Illinois (IL) |
| EHQ | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| EHR | Unassigned Prefix |
| EHS | Blue shield(BS) of California (CA) |
| EHT | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| EHU | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| EHV | Unassigned Prefix |
| EHW | Unassigned Prefix |
| EHX | Unassigned Prefix |
| EHY | BCBS of Illinois (IL) |
| EHZ | Unassigned Prefix |
| EIA | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| EIB | BCBS of Alabama (AL) |
| EIC | Unassigned Prefix |
| EID | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| EIE | Unassigned Prefix |
| EIF | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| EIG | Unassigned Prefix |
| EIH | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| EII | BCBS of South Carolina (SC) / Southcarolinablues |
| EIJ | Unassigned Prefix |
| EIK | Unassigned Prefix |
| EIL | BCBS of North Carolina (NC) |
| EIM | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| EIN | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| EIO | Unassigned Prefix |
| EIP | Unassigned Prefix |
| EIQ | Premera BCBS of Alaska (AK) |
| EIR | Highmark BCBS of Pennsylvania (PA) |
| EIS | Blue shield(BS) of California (CA) |
| EIT | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| EIU | BCBS of Illinois (IL) |
| EIV | BCBS of South Carolina (SC) / Southcarolinablues |
| EIW | BCBS Blue Care Network Michigan (MI) |
| EIX | BCBS of Alabama (AL) |
| EIY | Blue shield(BS) of California (CA) |
| EIZ | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| EJA | Anthem BCBS of Wisconsin (WI) |
| EJB | Anthem BCBS of Colorado (CO) |
| EJC | BCBS of Texas (TX) |
| EJD | Unassigned Prefix |
| EJE | BCBS Blue Care Network Michigan (MI) |
| EJF | Unassigned Prefix |
| EJG | Unassigned Prefix |
| EJH | Unassigned Prefix |
| EJI | BCBS Blue Care Network Michigan (MI) |
| EJJ | Anthem Blue Cross(BC) of California (CA) |
| EJK | Anthem Blue Cross(BC) of California (CA) |
| EJL | BCBS of Mississippi (MS) |
| EJM | Anthem BCBS of Missouri (MO) |
| EJN | Anthem Blue Cross(BC) of California (CA) |
| EJO | Unassigned Prefix |
| EJP | BCBS of Minnesota (MN) |
| EJQ | Anthem Blue Cross(BC) of California (CA) |
| EJR | Unassigned Prefix |
| EJS | Unassigned Prefix |
| EJT | BCBS of Texas (TX) |
| EJU | Anthem Blue Cross(BC) of California (CA) |
| EJV | Anthem Blue Cross(BC) of California (CA) |
| EJW | BCBS Blue Care Network Michigan (MI) |
| EJX | BCBS of Arizona (AZ) |
| EJY | BCBS of Arizona (AZ) |
| EJZ | BCBS of Tennessee (TN) |
| EKA | Unassigned Prefix |
| EKB | Wellmark |
| EKC | Anthem BCBS of Ohio (OH) |
| EKD | Unassigned Prefix |
| EKE | BCBS of Texas (TX) |
| EKF | Florida (FL) Blue |
| EKG | Wellmark |
| EKH | BCBS of New Mexico (NM) |
| EKI | Unassigned Prefix |
| EKJ | BCBS of South Carolina (SC) / Southcarolinablues |
| EKK | BCBS of Minnesota (MN) |
| EKL | BCBS of Kansas City |
| EKM | Anthem BCBS of Ohio (OH) |
| EKN | Premera BCBS of Alaska (AK) |
| EKO | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| EKP | BCBS of South Carolina (SC) / Southcarolinablues |
| EKQ | Unassigned Prefix |
| EKR | Unassigned Prefix |
| EKS | Highmark BCBS of Pennsylvania (PA) |
| EKT | Blue shield(BS) of California (CA) |
| EKU | Anthem BCBS of Ohio (OH) |
| EKV | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| EKW | Unassigned Prefix |
| EKX | Wellmark |
| EKY | Anthem BCBS of Ohio (OH) |
| EKZ | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| ELA | BCBS of Minnesota (MN) |
| ELB | BCBS of Texas (TX) |
| ELC | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| ELD | Anthem BCBS of Ohio (OH) |
| ELE | BCBS of Texas (TX) |
| ELF | Anthem BCBS of Wisconsin (WI) |
| ELG | BCBS of Minnesota (MN) |
| ELH | Anthem BCBS of Connecticut (CT) |
| ELI | BCBS of Massachusetts (MA) |
| ELJ | Unassigned Prefix |
| ELK | Wellmark |
| ELL | Unassigned Prefix |
| ELM | BCBS of Illinois (IL) |
| ELN | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| ELO | BCBS of South Carolina (SC) / Southcarolinablues |
| ELP | BCBS of Minnesota (MN) |
| ELQ | Anthem BCBS of Missouri (MO) |
| ELR | Unassigned Prefix |
| ELS | Unassigned Prefix |
| ELT | BCBS of Illinois (IL) |
| ELU | Unassigned Prefix |
| ELV | BCBS of South Carolina (SC) / Southcarolinablues |
| ELW | Anthem BCBS of Missouri (MO) |
| ELX | Wellmark |
| ELY | Anthem BCBS of Ohio (OH) |
| ELZ | Anthem BCBS of Kentucky (KY) |
| EMA | Florida (FL) Blue |
| EMB | Anthem BCBS of Ohio (OH) |
| EMC | Unassigned Prefix |
| EMD | Wellmark |
| EME | Wellmark |
| EMF | Blue shield(BS) of California (CA) |
| EMG | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| EMH | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| EMI | Anthem BCBS of Indiana (IN) |
| EMJ | Anthem BCBS of Ohio (OH) |
| EMK | BCBS of South Carolina (SC) / Southcarolinablues |
| EML | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| EMM | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| EMN | Highmark BCBS of Pennsylvania (PA) |
| EMO | BCBS of Louisiana (LA) |
| EMP | BCBS of Illinois (IL) |
| EMQ | BCBS of Alabama (AL) |
| EMR | BCBS of Alabama (AL) |
| EMS | Anthem BCBS of Georgia (GA) |
| EMT | Anthem Blue Cross(BC) of California (CA) |
| EMU | Anthem BCBS of Ohio (OH) |
| EMV | BCBS of Alabama (AL) |
| EMW | BCBS Blue Care Network Michigan (MI) |
| EMX | Unassigned Prefix |
| EMY | Premera BCBS of Alaska (AK) |
| EMZ | Anthem BCBS of Indiana (IN) |
| ENA | Anthem Blue Cross(BC) of California (CA) |
| ENB | Florida (FL) Blue |
| ENC | Anthem BCBS of Virginia (VA) |
| END | BCBS of Oklahoma (OK) |
| ENE | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| ENF | BCBS of Texas (TX) |
| ENG | Wellmark |
| ENH | Unassigned Prefix |
| ENI | Unassigned Prefix |
| ENJ | Unassigned Prefix |
| ENK | Unassigned Prefix |
| ENL | BCBS of Massachusetts (MA) |
| ENM | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| ENN | BCBS of South Carolina (SC) / Southcarolinablues |
| ENO | Anthem BCBS of Kentucky (KY) |
| ENP | Unassigned Prefix |
| ENQ | Wellmark |
| ENR | Unassigned Prefix |
| ENS | Capital Blue Cross of Pennsylvania (PA) |
| ENT | BCBS of Texas (TX) |
| ENU | BCBS of Alabama (AL) |
| ENV | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| ENW | Unassigned Prefix |
| ENX | Blue Cross (BC) of Idaho (ID) |
| ENY | Anthem BCBS of Wisconsin (WI) |
| ENZ | BCBS of Illinois (IL) |
| EOA | Anthem BCBS of Ohio (OH) |
| EOB | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| EOC | Blue shield(BS) of California (CA) |
| EOD | Highmark BCBS of Pennsylvania (PA) |
| EOE | Blue Cross (BC) of Idaho (ID) |
| EOF | Capital Blue Cross of Pennsylvania (PA) |
| EOG | Anthem BCBS of Missouri (MO) |
| EOH | Anthem BCBS of Georgia (GA) |
| EOI | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| EOJ | BCBS Blue Care Network Michigan (MI) |
| EOK | Wellmark |
| EOL | Unassigned Prefix |
| EOM | Highmark BCBS of Pennsylvania (PA) |
| EON | Unassigned Prefix |
| EOO | Unassigned Prefix |
| EOP | Anthem BCBS of Georgia (GA) |
| EOQ | Unassigned Prefix |
| EOR | Unassigned Prefix |
| EOS | Unassigned Prefix |
| EOT | BCBS of South Carolina (SC) / Southcarolinablues |
| EOU | Wellmark |
| EOV | BCBS Blue Care Network Michigan (MI) |
| EOW | Unassigned Prefix |
| EOX | Premera BCBS of Alaska (AK) |
| EOY | Florida (FL) Blue |
| EOZ | Unassigned Prefix |
| EPA | Anthem BCBS of Ohio (OH) |
| EPB | Unassigned Prefix |
| EPC | Anthem BCBS of Missouri (MO) |
| EPD | BCBS Blue Care Network Michigan (MI) |
| EPE | Blue Cross (BC) of Idaho (ID) |
| EPF | Blue shield(BS) of California (CA) |
| EPG | Blue shield(BS) of California (CA) |
| EPH | BCBS of South Carolina (SC) / Southcarolinablues |
| EPI | Unassigned Prefix |
| EPJ | Unassigned Prefix |
| EPK | BCBS of Tennessee (TN) |
| EPL | Anthem BCBS of Missouri (MO) |
| EPM | Blue shield(BS) of Northeastern New York (NeNY) |
| EPN BCBS Prefix | BCBS of Texas (TX) |
| EPO | Blue shield(BS) of California (CA) |
| EPP | Unassigned Prefix |
| EPQ | Capital Blue Cross of Pennsylvania (PA) |
| EPR | Unassigned Prefix |
| EPS | Unassigned Prefix |
| EPT | BCBS of Alabama (AL) |
| EPU | Unassigned Prefix |
| EPV | BCBS of Massachusetts (MA) |
| EPW | Unassigned Prefix |
| EPX | Unassigned Prefix |
| EPY | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| EPZ | Unassigned Prefix |
| EQA | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| EQB | BCBS of Alabama (AL) |
| EQC | Blue shield(BS) of California (CA) |
| EQD | Unassigned Prefix |
| EQE | BCBS of Nebraska (NE) |
| EQF | BCBS of Western New York (WNY) |
| EQG | BCBS of Tennessee (TN) |
| EQH | Unassigned Prefix |
| EQI | Unassigned Prefix |
| EQJ | Unassigned Prefix |
| EQK | Anthem BCBS of Indiana (IN) |
| EQL | BCBS of Western New York (WNY) |
| EQM | BCBS of Massachusetts (MA) |
| EQN | Florida (FL) Blue |
| EQO Florida (FL) Blue |
| EQP | Empire BCBS of New York (NY) |
| EQQ | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| EQR | BCBS of Western New York (WNY) |
| EQS | Unassigned Prefix |
| EQT | Anthem BCBS of Ohio (OH) |
| EQU | BCBS of Texas (TX) |
| EQV | Empire BCBS of New York (NY) |
| EQW | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| EQX | BCBS of Louisiana (LA) |
| EQY | Anthem Blue Cross(BC) of California (CA) |
| EQZ | BCBS of Minnesota (MN) |
| ERA | BCBS of Western New York (WNY) |
| ERB | Unassigned Prefix |
| ERC | Regence BCBS |
| ERD | Florida (FL) Blue |
| ERE | Premera BCBS of Alaska (AK) |
| ERF | Unassigned Prefix |
| ERG | BCBS of Alabama (AL) |
| ERH | BCBS of Massachusetts (MA) |
| ERI | Unassigned Prefix |
| ERJ | BCBS of South Carolina (SC) / Southcarolinablues |
| ERK | BCBS of Massachusetts (MA) |
| ERL | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| ERM | Unassigned Prefix |
| ERN | Anthem BCBS of Ohio (OH) |
| ERO | BCBS of South Carolina (SC) / Southcarolinablues |
| ERP | Capital Blue Cross of Pennsylvania (PA) |
| ERQ | Unassigned Prefix |
| ERR | Arkansas (AR) Blue Cross |
| ERS | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| ERT | Wellmark |
| ERU | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| ERV | BCBS of Rhode Island (RI) |
| ERW | Wellmark |
| ERX | Blue shield(BS) of California (CA) |
| ERY | Anthem BCBS of Ohio (OH) |
| ERZ | Unassigned Prefix |
| ESA | Unassigned Prefix |
| ESB | BCBS Blue Care Network Michigan (MI) |
| ESC | Unassigned Prefix |
| ESD | BCBS of Massachusetts (MA) |
| ESE | Anthem BCBS of Ohio (OH) |
| ESF | Blue shield(BS) of California (CA) |
| ESG | BCBS of Texas (TX) |
| ESH | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| ESI | Capital Blue Cross of Pennsylvania (PA) |
| ESJ | Unassigned Prefix |
| ESK | Wellmark |
| ESL | Florida (FL) Blue |
| ESM | Anthem BCBS of Missouri (MO) |
| ESN | Anthem BCBS of Wisconsin (WI) |
| ESO | Regence BCBS |
| ESP | Unassigned Prefix |
| ESQ | Wellmark |
| ESR | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| ESS | BCBS of Massachusetts (MA) |
| EST | BCBS of Western New York (WNY) |
| ESU | Blue shield(BS) of California (CA) |
| ESV | Blue shield(BS) of California (CA) |
| ESW | Blue shield(BS) of California (CA) |
| ESX | Wellmark |
| ESY | Unassigned Prefix |
| ESZ | BCBS of Tennessee (TN) |
| ETA | BCBS of Illinois (IL) |
| ETB | BCBS of Minnesota (MN) |
| ETC | Anthem BCBS of Virginia (VA) |
| ETD | Unassigned Prefix |
| ETE | Premera BCBS of Alaska (AK) |
| ETF | Anthem BCBS of Georgia (GA) |
| ETG | BCBS of Illinois (IL) |
| ETH | Unassigned Prefix |
| ETI | Anthem BCBS of Missouri (MO) |
| ETJ | Anthem BCBS of Georgia (GA) |
| ETK | Anthem BCBS of Wisconsin (WI) |
| ETL | Blue shield(BS) of Northeastern New York (NeNY) |
| ETM | Highmark BCBS of Pennsylvania (PA) |
| ETN | Unassigned Prefix |
| ETO | Unassigned Prefix |
| ETP | Anthem BCBS of Georgia (GA) |
| ETQ | BCBS of Kansas City |
| ETR BCBS Prefix | Empire BCBS of New York (NY) |
| ETS | BCBS of Massachusetts (MA) |
| ETT | Highmark BCBS of Pennsylvania (PA) |
| ETU | BCBS of Massachusetts (MA) |
| ETV | Anthem BCBS of Missouri (MO) |
| ETW | Unassigned Prefix |
| ETX | Florida (FL) Blue |
| ETY | Unassigned Prefix |
| ETZ | Anthem BCBS of Georgia (GA) |
| EUA | Anthem Blue Cross(BC) of California (CA) |
| EUB | Unassigned Prefix |
| EUC | Anthem BCBS of Ohio (OH) |
| EUD | BCBS of Louisiana (LA) |
| EUE | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| EUF | Regence BCBS |
| EUG | Unassigned Prefix |
| EUH | BCBS of Illinois (IL) |
| EUI | Unassigned Prefix |
| EUJ | Wellmark |
| EUK | BCBS of Illinois (IL) |
| EUL | Unassigned Prefix |
| EUM | BCBS of Vermont (VT) |
| EUN | Blue shield(BS) of California (CA) |
| EUO | BCBS of South Carolina (SC) / Southcarolinablues |
| EUP | Unassigned Prefix |
| EUQ | Unassigned Prefix |
| EUR | BCBS of Nebraska (NE) |
| EUS | Florida (FL) Blue |
| EUT | Unassigned Prefix |
| EUU | Florida (FL) Blue |
| EUV | BCBS Blue Care Network Michigan (MI) |
| EUW | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| EUX | Unassigned Prefix |
| EUY | Anthem BCBS of Georgia (GA) |
| EUZ | Unassigned Prefix |
| EVA | Unassigned Prefix |
| EVB | Unassigned Prefix |
| EVC | BCBS of Massachusetts (MA) |
| EVD | Unassigned Prefix |
| EVE | BCBS of North Carolina (NC) |
| EVF | BCBS of Alabama (AL) |
| EVG | Unassigned Prefix |
| EVH | Wellmark |
| EVI | Arkansas (AR) Blue Cross |
| EVJ | Unassigned Prefix |
| EVK | Wellmark |
| EVL | Anthem BCBS of Georgia (GA) |
| EVM | Anthem BCBS of Missouri (MO) |
| EVN | Regence BCBS |
| EVO | Blue shield(BS) of California (CA) |
| EVP | BCBS of South Carolina (SC) / Southcarolinablues |
| EVQ | Anthem BCBS of Colorado (CO) |
| EVR | Anthem Blue Cross(BC) of California (CA) |
| EVS | BCBS of South Carolina (SC) / Southcarolinablues |
| EVT | BCBS of Vermont (VT) |
| EVU | Unassigned Prefix |
| EVV | Unassigned Prefix |
| EVW | Unassigned Prefix |
| EVX | BCBS of Massachusetts (MA) |
| EVY | Unassigned Prefix |
| EVZ | Unassigned Prefix |
| EWA | Anthem BCBS of Ohio (OH) |
| EWB | Anthem BCBS of Ohio (OH) |
| EWC | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| EWD | Unassigned Prefix |
| EWE | Unassigned Prefix |
| EWF | Empire BCBS of New York (NY) |
| EWG | Anthem BCBS of Ohio (OH) |
| EWH | Wellmark |
| EWI | Unassigned Prefix |
| EWJ | Anthem Blue Cross(BC) of California (CA) |
| EWK | Unassigned Prefix |
| EWL | Unassigned Prefix |
| EWM | Anthem BCBS of Ohio (OH) |
| EWN | Unassigned Prefix |
| EWO | BCBS of South Carolina (SC) / Southcarolinablues |
| EWP | Anthem BCBS of Missouri (MO) |
| EWQ | Anthem BCBS of Connecticut (CT) |
| EWR | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| EWS | Horizon BCBS of New Jersey (NJ) |
| EWT | Anthem BCBS of Georgia (GA) |
| EWU | Anthem BCBS of Connecticut (CT) |
| EWV | Unassigned Prefix |
| EWW | Anthem BCBS of Ohio (OH) |
| EWX | BCBS of Arizona (AZ) |
| EWY | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| EWZ | Anthem Blue Cross(BC) of California (CA) |
| EXA | Arkansas (AR) Blue Cross |
| EXB | Unassigned Prefix |
| EXC | Anthem BCBS of Ohio (OH) |
| EXD | Premera BCBS of Alaska (AK) |
| EXE | Anthem BCBS of Georgia (GA) |
| EXF | Anthem BCBS of Missouri (MO) |
| EXG | Unassigned Prefix |
| EXH | Anthem BCBS of Ohio (OH) |
| EXI | Anthem BCBS of Ohio (OH) |
| EXJ | Empire BCBS of New York (NY) |
| EXK | Anthem BCBS of Ohio (OH) |
| EXL | Empire BCBS of New York (NY) |
| EXM | Anthem BCBS of Missouri (MO) |
| EXN | BCBS of Texas (TX) |
| EXO | Unassigned Prefix |
| EXP | Wellmark |
| EXQ | Anthem Blue Cross(BC) of California (CA) |
| EXR | Unassigned Prefix |
| EXS | BCBS of Illinois (IL) |
| EXT | Anthem BCBS of Virginia (VA) |
| EXU | BCBS of Massachusetts (MA) |
| EXV | Unassigned Prefix |
| EXW | Unassigned Prefix |
| EXX BCBS Prefix | Arkansas (AR) Blue Cross |
| EXY | BCBS of Massachusetts (MA) |
| EXZ | Premera BCBS of Alaska (AK) |
| EYA | BCBS of Massachusetts (MA) |
| EYB | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| EYC | Unassigned Prefix |
| EYD | Anthem BCBS of Connecticut (CT) |
| EYE | Wellmark |
| EYF | Wellmark |
| EYG | Unassigned Prefix |
| EYH | Anthem BCBS of Ohio (OH) |
| EYI | Anthem BCBS of Georgia (GA) |
| EYJ | Florida (FL) Blue |
| EYK | Wellmark |
| EYL | Horizon BCBS of New Jersey (NJ) |
| EYM | Unassigned Prefix |
| EYN | BCBS of Minnesota (MN) |
| EYO | Anthem BCBS of Georgia (GA) |
| EYP | Wellmark |
| EYQ | BCBS of South Carolina (SC) / Southcarolinablues |
| EYR | BCBS of Illinois (IL) |
| EYS | Unassigned Prefix |
| EYT | Unassigned Prefix |
| EYU | Anthem BCBS of Ohio (OH) |
| EYV | Blue Cross (BC) of Idaho (ID) |
| EYW | Unassigned Prefix |
| EYX | Unassigned Prefix |
| EYY | Capital Blue Cross of Pennsylvania (PA) |
| EYZ | BCBS of Tennessee (TN) |
| EZA | BCBS of Oklahoma (OK) |
| EZB | Regence BCBS |
| EZC | Anthem BCBS of Wisconsin (WI) |
| EZD | Premera BCBS of Alaska (AK) |
| EZE | Anthem BCBS of Missouri (MO) |
| EZF | Capital Blue Cross of Pennsylvania (PA) |
| EZG | BCBS of Texas (TX) |
| EZH | Unassigned Prefix |
| EZI | Unassigned Prefix |
| EZJ | Anthem BCBS of Georgia (GA) |
| EZK | Anthem BCBS of Georgia (GA) |
| EZL | Unassigned Prefix |
| EZM | Anthem BCBS of Indiana (IN) |
| EZN | BCBS of Louisiana (LA) |
| EZO | Capital Blue Cross of Pennsylvania (PA) |
| EZP | Unassigned Prefix |
| EZQ | BCBS of South Carolina (SC) / Southcarolinablues |
| EZR | Anthem BCBS of Missouri (MO) |
| EZS | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| EZT | Anthem Blue Cross(BC) of California (CA) |
| EZU | BCBS of South Carolina (SC) / Southcarolinablues |
| EZV BCBS Prefix | Anthem BCBS of Ohio (OH) |
| EZW | BCBS of Louisiana (LA) |
| EZX | Unassigned Prefix |
| EZY | BCBS of Alabama (AL) |
| EZZ | Wellmark |
