| RAA | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| RAB | Florida (FL) Blue |
| RAC | Anthem BCBS of Wisconsin (WI) |
| RAD | Wellmark |
| RAE | BCBS of North Carolina (NC) |
| RAF | Unassigned Prefix |
| RAG | Wellmark |
| RAH | Anthem BCBS of Connecticut (CT) |
| RAI | Wellmark |
| RAJ | BCBS of Alabama (AL) |
| RAK | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| RAL | Anthem BCBS of Ohio (OH) |
| RAM | BCBS of Texas (TX) |
| RAN | Wellmark |
| RAO | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| RAP | Wellmark |
| RAQ | Wellmark |
| RAR | Anthem BCBS of Kentucky (KY) |
| RAS | Blue shield(BS) of California (CA) |
| RAT | Anthem Blue Cross(BC) of California (CA) |
| RAU | BCBS of South Carolina (SC) / Southcarolinablues |
| RAV | Anthem BCBS of Virginia (VA) |
| RAW | Unassigned Prefix |
| RAX | BCBS of Western New York (WNY) |
| RAY | Unassigned Prefix |
| RAZ | Blue shield(BS) of California (CA) |
| RBA | Anthem BCBS of Georgia (GA) |
| RBB | Unassigned Prefix |
| RBC | Anthem BCBS of Wisconsin (WI) |
| RBD | Unassigned Prefix |
| RBE | Wellmark |
| RBF | BCBS of Minnesota (MN) |
| RBG | BCBS of Illinois (IL) |
| RBH | Anthem BCBS of Ohio (OH) |
| RBI | BCBS of Mississippi (MS) |
| RBJ | Unassigned Prefix |
| RBK | Florida (FL) Blue |
| RBL | Anthem Blue Cross(BC) of California (CA) |
| RBM | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| RBN | BCBS of South Carolina (SC) / Southcarolinablues |
| RBO | Anthem BCBS of Georgia (GA) |
| RBP | BCBS of Minnesota (MN) |
| RBQ | Anthem BCBS of Ohio (OH) |
| RBR | BCBS of Massachusetts (MA) |
| RBS | BCBS of Texas (TX) |
| RBT | BCBS of Illinois (IL) |
| RBU | Anthem BCBS of Georgia (GA) |
| RBV | Unassigned Prefix |
| RBW | Unassigned Prefix |
| RBX | BCBS of South Carolina (SC) / Southcarolinablues |
| RBY | BCBS of Minnesota (MN) |
| RBZ | Anthem BCBS of Missouri (MO) |
| RCA | Unassigned Prefix |
| RCB | Blue Cross (BC) of Idaho (ID) |
| RCC | Empire BCBS of New York (NY) |
| RCD | Unassigned Prefix |
| RCE | BCBS of Western New York (WNY) |
| RCF | BCBS of Alabama (AL) |
| RCG | Unassigned Prefix |
| RCH | BCBS of Massachusetts (MA) |
| RCI | Anthem BCBS of Missouri (MO) |
| RCJ | Anthem BCBS of Georgia (GA) |
| RCK | Wellmark |
| RCL | BCBS of Tennessee (TN) |
| RCM | BCBS of Alabama (AL) |
| RCN | Wellmark |
| RCO | Unassigned Prefix |
| RCP | Unassigned Prefix |
| RCQ | BCBS of Texas (TX) |
| RCR | BCBS of Illinois (IL) |
| RCS | Unassigned Prefix |
| RCT | Anthem BCBS of Virginia (VA) |
| RCU | Unassigned Prefix |
| RCV | Anthem BCBS of Ohio (OH) |
| RCW | BCBS of Louisiana(LA) |
| RCX | Unassigned Prefix |
| RCY | BCBS of Illinois (IL) |
| RCZ | Anthem BCBS of Connecticut (CT) |
| RDA | Anthem BCBS of Georgia (GA) |
| RDB | BCBS of North Carolina (NC) |
| RDC | Unassigned Prefix |
| RDD | BCBS of North Dakota (ND) |
| RDE | Unassigned Prefix |
| RDF | Empire BCBS of New York (NY) |
| RDG | Anthem BCBS of Ohio (OH) |
| RDH | Anthem BCBS of Ohio (OH) |
| RDI | Unassigned Prefix |
| RDJ | Unassigned Prefix |
| RDK | Unassigned Prefix |
| RDL | Anthem BCBS of Wisconsin (WI) |
| RDM | Highmark BCBS of Pennsylvania (PA) |
| RDN | Blue shield(BS) of California (CA) |
| RDO | Unassigned Prefix |
| RDP | Wellmark |
| RDQ | Unassigned Prefix |
| RDR | Highmark BCBS of Pennsylvania (PA) |
| RDS | BCBS Blue Care Network Michigan (MI) |
| RDT | Blue shield(BS) of California (CA) |
| RDU | BCBS of North Carolina (NC) |
| RDV | Unassigned Prefix |
| RDW | Unassigned Prefix |
| RDX | Anthem Blue Cross(BC) of California (CA) |
| RDY | Unassigned Prefix |
| RDZ | Highmark BCBS of Pennsylvania (PA) |
| REA | Blue shield(BS) of California (CA) |
| REB | Unassigned Prefix |
| REC | Wellmark |
| RED | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| REE | BCBS of Kansas City |
| REF | BCBS of Texas (TX) |
| REG | Wellmark |
| REH | Unassigned Prefix |
| REI | Blue shield(BS) of California (CA) |
| REJ | BCBS Blue Care Network Michigan (MI) |
| REK | Wellmark |
| REL | Unassigned Prefix |
| REM | BCBS of Vermont (VT) |
| REN | BCBS Blue Care Network Michigan (MI) |
| REO | Unassigned Prefix |
| REP | Empire BCBS of New York (NY) |
| REQ | BCBS of Western New York (WNY) |
| RER | Anthem Blue Cross(BC) of California (CA) |
| RES | Unassigned Prefix |
| RET | BCBS of Texas (TX) |
| REU | Anthem Blue Cross(BC) of California (CA) |
| REV | BCBS of Massachusetts (MA) |
| REW | Blue shield(BS) of California (CA) |
| REX | BCBS of Texas (TX) |
| REY | BCBS of Texas (TX) |
| REZ | Unassigned Prefix |
| RFA | BCBS of Kansas City |
| RFB | Empire BCBS of New York (NY) |
| RFC | Florida (FL) Blue |
| RFD | BCBS of Minnesota (MN) |
| RFE | Unassigned Prefix |
| RFF | BCBS of Minnesota (MN) |
| RFG | Anthem Blue Cross(BC) of California (CA) |
| RFH | BCBS of Illinois (IL) |
| RFI | Unassigned Prefix |
| RFJ | Anthem BCBS of Wisconsin (WI) |
| RFK | BCBS of Illinois (IL) |
| RFL | Anthem BCBS of Wisconsin (WI) |
| RFM | Unassigned Prefix |
| RFN | Unassigned Prefix |
| RFO | BCBS of Kansas City |
| RFP | Anthem BCBS of Wisconsin (WI) |
| RFQ | Unassigned Prefix |
| RFR | Unassigned Prefix |
| RFS | Blue shield(BS) of California (CA) |
| RFT | Blue shield(BS) of California (CA) |
| RFU | Unassigned Prefix |
| RFV | BCBS Blue Care Network Michigan (MI) |
| RFW | Horizon BCBS of New Jersey (NJ) |
| RFX | Blue Cross (BC) of Idaho (ID) |
| RFY | BCBS Blue Care Network Michigan (MI) |
| RFZ | Anthem Blue Cross(BC) of California (CA) |
| RGA | Anthem Blue Cross(BC) of California (CA) |
| RGB | BCBS of Illinois (IL) |
| RGC | BCBS of Texas (TX) |
| RGD | Wellmark |
| RGE | Wellmark |
| RGF | BCBS of North Carolina (NC) |
| RGG | BCBS of Tennessee (TN) |
| RGH | BCBS of Texas (TX) |
| RGI | BCBS Blue Care Network Michigan (MI) |
| RGJ | Unassigned Prefix |
| RGK | BCBS of Kansas City |
| RGL | BCBS of Illinois (IL) |
| RGM | Anthem Blue Cross(BC) of California (CA) |
| RGN | BCBS of Alabama (AL) |
| RGO | Regence BCBS |
| RGP | Anthem BCBS of Georgia (GA) |
| RGQ | Unassigned Prefix |
| RGR | Unassigned Prefix |
| RGS | Blue Cross (BC) of Idaho (ID) |
| RGT | BCBS of Alabama (AL) |
| RGU | Anthem BCBS of Georgia (GA) |
| RGV | BCBS of North Carolina (NC) |
| RGW | Horizon BCBS of New Jersey (NJ) |
| RGX | Anthem BCBS of Virginia (VA) |
| RGY | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| RGZ | Anthem BCBS of Ohio (OH) |
| RHA | Blue shield(BS) of California (CA) |
| RHB | Anthem BCBS of Georgia (GA) |
| RHC | Unassigned Prefix |
| RHD | Unassigned Prefix |
| RHE | Anthem BCBS of Missouri (MO) |
| RHF | Anthem BCBS of Kentucky (KY) |
| RHG | Unassigned Prefix |
| RHH | BCBS of Texas (TX) |
| RHI | Unassigned Prefix |
| RHJ | Florida (FL) Blue |
| RHK | BCBS of Nebraska (NE) |
| RHL | Premera BCBS of Alaska (AK) |
| RHM | Highmark BCBS of Pennsylvania (PA) |
| RHN | Highmark BCBS of Pennsylvania (PA) |
| RHO | Anthem BCBS of Wisconsin (WI) |
| RHP | Anthem Blue Cross(BC) of California (CA) |
| RHQ | Regence BCBS |
| RHR | Anthem BCBS of Kentucky (KY) |
| RHS | Anthem BCBS of Kentucky (KY) |
| RHT | Anthem BCBS of Georgia (GA) |
| RHU | Anthem BCBS of Virginia (VA) |
| RHV | Highmark BCBS of Pennsylvania (PA) |
| RHW | BCBS of Texas (TX) |
| RHX | Anthem BCBS of Wisconsin (WI) |
| RHY | BCBS of Illinois (IL) |
| RHZ | BCBS of Nebraska (NE) |
| RIA | BCBS of Rhode Island (RI) |
| RIB | BCBS of Rhode Island (RI) |
| RIC | Unassigned Prefix |
| RID | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| RIE | BCBS of Massachusetts (MA) |
| RIF | Highmark BCBS of Pennsylvania (PA) |
| RIG | BCBS Blue Care Network Michigan (MI) |
| RIH | Highmark BCBS of Pennsylvania (PA) |
| RII | Regence BCBS |
| RIJ | Blue shield(BS) of California (CA) |
| RIK | Wellmark |
| RIL | Unassigned Prefix |
| RIM | Regence BCBS |
| RIN | BCBS of Rhode Island (RI) |
| RIO | Unassigned Prefix |
| RIP | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| RIQ | BCBS Blue Care Network Michigan (MI) |
| RIR | Highmark BCBS of Pennsylvania (PA) |
| RIS | BCBS of Rhode Island (RI) |
| RIT | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| RIU | Anthem BCBS of Kentucky (KY) |
| RIV | Blue shield(BS) of California (CA) |
| RIW | Unassigned Prefix |
| RIX | Blue shield(BS) of California (CA) |
| RIY | Florida (FL) Blue |
| RIZ | BCBS of Alabama (AL) |
| RJA | Unassigned Prefix |
| RJB | Unassigned Prefix |
| RJC | Anthem BCBS of Kentucky (KY) |
| RJD | Unassigned Prefix |
| RJE | Anthem BCBS of Ohio (OH) |
| RJF | Regence BCBS |
| RJG | Unassigned Prefix |
| RJH | Wellmark |
| RJI | Unassigned Prefix |
| RJJ | Unassigned Prefix |
| RJK | BCBS of Oklahoma (OK) |
| RJL | Highmark BCBS of Pennsylvania (PA) |
| RJM | Unassigned Prefix |
| RJN | Anthem BCBS of Ohio (OH) |
| RJO | Unassigned Prefix |
| RJP | Anthem BCBS of Kentucky (KY) |
| RJQ | Anthem BCBS of Wisconsin (WI) |
| RJR | Highmark BCBS of Pennsylvania (PA) |
| RJS | Florida (FL) Blue |
| RJT | Anthem Blue Cross(BC) of California (CA) |
| RJU | Horizon BCBS of New Jersey (NJ) |
| RJV | BCBS of Illinois (IL) |
| RJW | Anthem BCBS of Indiana (IN) |
| RJX | Horizon BCBS of New Jersey (NJ) |
| RJY | BCBS of Massachusetts (MA) |
| RJZ | BCBS Blue Care Network Michigan (MI) |
| RKA | Empire BCBS of New York (NY) |
| RKB | Unassigned Prefix |
| RKC | BCBS of Kansas City |
| RKD | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| RKE | Wellmark |
| RKF | Highmark BCBS of Pennsylvania (PA) |
| RKG | BCBS of Minnesota (MN) |
| RKH | BCBS of Illinois (IL) |
| RKI | Anthem Blue Cross(BC) of California (CA) |
| RKJ | Wellmark |
| RKK | Unassigned Prefix |
| RKL | Wellmark |
| RKM | Highmark BCBS of Pennsylvania (PA) |
| RKN | BCBS of Kansas City |
| RKO | Unassigned Prefix |
| RKP | Wellmark |
| RKQ | BCBS of Kansas City |
| RKR | Wellmark |
| RKS | Anthem BCBS of Virginia (VA) |
| RKT | BCBS of Minnesota (MN) |
| RKU | Horizon BCBS of New Jersey (NJ) |
| RKV | Unassigned Prefix |
| RKW | Unassigned Prefix |
| RKX | Horizon BCBS of New Jersey (NJ) |
| RKY | Anthem BCBS of Georgia (GA) |
| RKZ | BCBS of Massachusetts (MA) |
| RLA | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| RLB | Unassigned Prefix |
| RLC | Anthem BCBS of Ohio (OH) |
| RLD | BCBS of Illinois (IL) |
| RLE | BCBS of Nebraska (NE) |
| RLF | Arkansas (AR) Blue Cross |
| RLG | BCBS of Massachusetts (MA) |
| RLH | Anthem BCBS of Ohio (OH) |
| RLI | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| RLJ | Anthem BCBS of Virginia (VA) |
| RLK | BCBS of Illinois (IL) |
| RLL | Anthem BCBS of Nevada (NV) |
| RLM | Unassigned Prefix |
| RLN | BCBS of Illinois (IL) |
| RLO | BCBS of South Carolina (SC) / Southcarolinablues |
| RLP | BCBS Blue Care Network Michigan (MI) |
| RLQ | Capital Blue Cross of Pennsylvania (PA) |
| RLR | Unassigned Prefix |
| RLS | BCBS of Kansas City |
| RLT | BCBS of Rhode Island (RI) |
| RLU | BCBS of Western New York (WNY) |
| RLV | Anthem BCBS of Wisconsin (WI) |
| RLW | Empire BCBS of New York (NY) |
| RLX | Horizon BCBS of New Jersey (NJ) |
| RLY | Blue shield(BS) of California (CA) |
| RLZ | BCBS of Illinois (IL) |
| RMA | Wellmark |
| RMB | Unassigned Prefix |
| RMC | Excellus BCBS of New York (NY) |
| RMD | Anthem BCBS of Kentucky (KY) |
| RME | Anthem BCBS of Maine (ME) |
| RMF | BCBS Blue Care Network Michigan (MI) |
| RMG | BCBS of Tennessee (TN) |
| RMH | BCBS Blue Care Network Michigan (MI) |
| RMI | Blue Cross (BC) of Idaho (ID) |
| RMJ | Unassigned Prefix |
| RMK | Anthem BCBS of Missouri (MO) |
| RML | BCBS of Illinois (IL) |
| RMM | BCBS of South Carolina (SC) / Southcarolinablues |
| RMN | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| RMO | BCBS of Western New York (WNY) |
| RMP | Anthem BCBS of Georgia (GA) |
| RMQ | Premera BCBS of Alaska (AK) |
| RMR | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| RMS | Premera BCBS of Alaska (AK) |
| RMT | Unassigned Prefix |
| RMU | Unassigned Prefix |
| RMV | BCBS Blue Care Network Michigan (MI) |
| RMW | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| RMX | Blue shield(BS) of California (CA) |
| RMY | Unassigned Prefix |
| RMZ | Unassigned Prefix |
| RNA | Capital Blue Cross of Pennsylvania (PA) |
| RNB | Regence BCBS |
| RNC | Wellmark |
| RND | BCBS of Illinois (IL) |
| RNE | Anthem Blue Cross(BC) of California (CA) |
| RNF | Anthem BCBS of Colorado (CO) |
| RNG | Anthem BCBS of Georgia (GA) |
| RNH | Anthem BCBS of Wisconsin (WI) |
| RNI | Anthem Blue Cross(BC) of California (CA) |
| RNJ | Anthem BCBS of Georgia (GA) |
| RNK | Anthem BCBS of Wisconsin (WI) |
| RNL | BCBS of Louisiana(LA) |
| RNM | Florida (FL) Blue |
| RNN | Anthem BCBS of Virginia (VA) |
| RNO | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| RNP | BCBS of Illinois (IL) |
| RNQ | Wellmark |
| RNR | Unassigned Prefix |
| RNS | Unassigned Prefix |
| RNT | BCBS of Minnesota (MN) |
| RNU | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| RNV | Blue shield(BS) of Northeastern New York (NeNY) |
| RNW | Anthem Blue Cross(BC) of California (CA) |
| RNX | Unassigned Prefix |
| RNY | BCBS of Nebraska (NE) |
| RNZ | Unassigned Prefix |
| ROA | BCBS of Massachusetts (MA) |
| ROB | Regence BCBS |
| ROC | Unassigned Prefix |
| ROD | Unassigned Prefix |
| ROE | Unassigned Prefix |
| ROF | BCBS of Illinois (IL) |
| ROG | Anthem BCBS of Connecticut (CT) |
| ROH | Unassigned Prefix |
| ROI | Unassigned Prefix |
| ROJ | Unassigned Prefix |
| ROK | Blue shield(BS) of Northeastern New York (NeNY) |
| ROL | Unassigned Prefix |
| ROM | Unassigned Prefix |
| RON | Blue shield(BS) of California (CA) |
| ROO | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| ROP | Blue shield(BS) of California (CA) |
| ROQ | Unassigned Prefix |
| ROR | Anthem BCBS of Ohio (OH) |
| ROS | BCBS of Alabama (AL) |
| ROT | Unassigned Prefix |
| ROU | BCBS Blue Care Network Michigan (MI) |
| ROV | BCBS of Western New York (WNY) |
| ROW | Unassigned Prefix |
| ROX | BCBS of North Carolina (NC) |
| ROY | Florida (FL) Blue |
| ROZ | Anthem BCBS of Colorado (CO) |
| RPA | Regence BCBS |
| RPB | Anthem BCBS of Kentucky (KY) |
| RPC | BCBS Blue Care Network Michigan (MI) |
| RPD | Blue shield(BS) of California (CA) |
| RPE | Unassigned Prefix |
| RPF | Unassigned Prefix |
| RPG | Unassigned Prefix |
| RPH | Anthem BCBS of Ohio (OH) |
| RPI | Highmark BCBS of Pennsylvania (PA) |
| RPJ | Highmark BCBS of Pennsylvania (PA) |
| RPK | Unassigned Prefix |
| RPL | Highmark BCBS of Pennsylvania (PA) |
| RPM | Unassigned Prefix |
| RPN | BCBS of North Carolina (NC) |
| RPO | Blue shield(BS) of California (CA) |
| RPP | Anthem BCBS of Georgia (GA) |
| RPQ | Blue shield(BS) of California (CA) |
| RPR | Wellmark |
| RPS | Unassigned Prefix |
| RPT | BCBS of Western New York (WNY) |
| RPU | Unassigned Prefix |
| RPV | Empire BCBS of New York (NY) |
| RPW | Anthem BCBS of Indiana (IN) |
| RPX | BCBS of Illinois (IL) |
| RPY | Arkansas (AR) Blue Cross |
| RPZ | BCBS of Louisiana(LA) |
| RQA | Wellmark |
| RQB | BCBS of Western New York (WNY) |
| RQC | BCBS of Illinois (IL) |
| RQD | Unassigned Prefix |
| RQE | Unassigned Prefix |
| RQF | BCBS Blue Care Network Michigan (MI) |
| RQG | Highmark BCBS of Pennsylvania (PA) |
| RQH | BCBS of Western New York (WNY) |
| RQI | BCBS of Alabama (AL) |
| RQJ | Anthem BCBS of Ohio (OH) |
| RQK | Unassigned Prefix |
| RQL | Unassigned Prefix |
| RQM | BCBS of Massachusetts (MA) |
| RQN | Unassigned Prefix |
| RQO | BCBS Blue Care Network Michigan (MI) |
| RQP | Anthem BCBS of Georgia (GA) |
| RQQ | Unassigned Prefix |
| RQR | Wellmark |
| RQS | Blue Cross (BC) of Idaho (ID) |
| RQT | Unassigned Prefix |
| RQU | Wellmark |
| RQV | Horizon BCBS of New Jersey (NJ) |
| RQW | BCBS of Massachusetts (MA) |
| RQX | BCBS Blue Care Network Michigan (MI) |
| RQY | BCBS Blue Care Network Michigan (MI) |
| RQZ | Premera BCBS of Alaska (AK) |
| RRA | Anthem BCBS of Ohio (OH) |
| RRB | Anthem BCBS of Indiana (IN) |
| RRC | BCBS of Alabama (AL) |
| RRD | Unassigned Prefix |
| RRE | Anthem BCBS of Ohio (OH) |
| RRF | Anthem BCBS of Ohio (OH) |
| RRG | Unassigned Prefix |
| RRH | Unassigned Prefix |
| RRI | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| RRJ | BCBS of Illinois (IL) |
| RRK | BCBS of Kansas City |
| RRL | Anthem BCBS of Kentucky (KY) |
| RRM | Anthem BCBS of Georgia (GA) |
| RRN | BCBS of Alabama (AL) |
| RRO | BCBS of Massachusetts (MA) |
| RRP | Regence BCBS |
| RRQ | Unassigned Prefix |
| RRR | Unassigned Prefix |
| RRS | BCBS of Illinois (IL) |
| RRT | Regence BCBS |
| RRU | Unassigned Prefix |
| RRV | Anthem Blue Cross(BC) of California (CA) |
| RRW | BCBS of Alabama (AL) |
| RRX | Florida (FL) Explore my Plan |
| RRY | BCBS of Texas (TX) |
| RRZ | Wellmark |
| RSA | Unassigned Prefix |
| RSB | Anthem Blue Cross(BC) of California (CA) |
| RSC | Unassigned Prefix |
| RSD | BCBS of Vermont (VT) |
| RSE | Anthem BCBS of Missouri (MO) |
| RSF | Unassigned Prefix |
| RSG | BCBS of Massachusetts (MA) |
| RSH | BCBS of Western New York (WNY) |
| RSI | Anthem BCBS of Wisconsin (WI) |
| RSJ | Unassigned Prefix |
| RSK | BCBS of South Carolina (SC) / Southcarolinablues |
| RSL | Unassigned Prefix |
| RSM | Anthem BCBS of Virginia (VA) |
| RSN | BCBS of Illinois (IL) |
| RSO | Blue shield(BS) of California (CA) |
| RSP | Unassigned Prefix |
| RSQ | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| RSR | BCBS of Illinois (IL) |
| RSS | Anthem BCBS of Georgia (GA) |
| RST | Capital Blue Cross of Pennsylvania (PA) |
| RSU | BCBS of Alabama (AL) |
| RSV | BCBS of Minnesota (MN) |
| RSW | Wellmark |
| RSX | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| RSY | Anthem Blue Cross(BC) of California (CA) |
| RSZ | BCBS of Alabama (AL) |
| RTA | BCBS of North Carolina (NC) |
| RTB | Anthem BCBS of Wisconsin (WI) |
| RTC | Florida (FL) Blue |
| RTD | Anthem BCBS of Wisconsin (WI) |
| RTE | BCBS of North Carolina (NC) |
| RTF | Anthem BCBS of Georgia (GA) |
| RTG | BCBS of Minnesota (MN) |
| RTH | BCBS Blue Care Network Michigan (MI) |
| RTI | Wellmark |
| RTJ | Unassigned Prefix |
| RTK | Florida (FL) Blue |
| RTL | Florida (FL) Blue |
| RTM | BCBS of Tennessee (TN) |
| RTN | Unassigned Prefix |
| RTO | BCBS of Massachusetts (MA) |
| RTP | BCBS of Tennessee (TN) |
| RTQ | Unassigned Prefix |
| RTR | Unassigned Prefix |
| RTS | Wellmark |
| RTT | BCBS of South Carolina (SC) / Southcarolinablues |
| RTU | BCBS of Alabama (AL) |
| RTV | Unassigned Prefix |
| RTW | Anthem BCBS of Georgia (GA) |
| RTX | Unassigned Prefix |
| RTY | Unassigned Prefix |
| RTZ | Unassigned Prefix |
| RUA | Wellmark |
| RUB | BCBS of Texas (TX) |
| RUC | Anthem BCBS of Missouri (MO) |
| RUD | Wellmark |
| RUE | BCBS of Alabama (AL) |
| RUF | Wellmark |
| RUG | Horizon BCBS of New Jersey (NJ) |
| RUH | Unassigned Prefix |
| RUI | Unassigned Prefix |
| RUJ | Premera BCBS of Alaska (AK) |
| RUK | Unassigned Prefix |
| RUL | Unassigned Prefix |
| RUM | BCBS of Texas (TX) |
| RUN | Unassigned Prefix |
| RUO | Wellmark |
| RUP | Wellmark |
| RUQ | Highmark BCBS of Pennsylvania (PA) |
| RUR | BCBS of Massachusetts (MA) |
| RUS | BCBS of Massachusetts (MA) |
| RUT | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| RUU | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| RUV | BCBS of Illinois (IL) |
| RUW | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| RUX | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| RUY | Unassigned Prefix |
| RUZ | Unassigned Prefix |
| RVA | BCBS of Western New York (WNY) |
| RVB | BCBS of South Carolina (SC) / Southcarolinablues |
| RVC | BCBS of Illinois (IL) |
| RVD | BCBS of Western New York (WNY) |
| RVE | Unassigned Prefix |
| RVF | BCBS of Alabama (AL) |
| RVG | Unassigned Prefix |
| RVH | Unassigned Prefix |
| RVI | Wellmark |
| RVJ | Wellmark |
| RVK | Unassigned Prefix |
| RVL | Unassigned Prefix |
| RVM | BCBS of Minnesota (MN) |
| RVN | Unassigned Prefix |
| RVO | Blue shield(BS) of California (CA) |
| RVP | Anthem Blue Cross(BC) of California (CA) |
| RVQ | Anthem Blue Cross(BC) of California (CA) |
| RVR | Premera BCBS of Alaska (AK) |
| RVS | Anthem Blue Cross(BC) of California (CA) |
| RVT | Empire BCBS of New York (NY) |
| RVU | Wellmark |
| RVV | Unassigned Prefix |
| RVW | Unassigned Prefix |
| RVX | Anthem BCBS of Kentucky (KY) |
| RVY | Anthem Blue Cross(BC) of California (CA) |
| RVZ | Empire BCBS of New York (NY) |
| RWA | BCBS of Texas (TX) |
| RWB | Empire BCBS of New York (NY) |
| RWC | Unassigned Prefix |
| RWD | BCBS of Western New York (WNY) |
| RWE | Unassigned Prefix |
| RWF | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| RWG | Regence BCBS |
| RWH | Unassigned Prefix |
| RWI | BCBS of Minnesota (MN) |
| RWJ | Anthem BCBS of Missouri (MO) |
| RWK | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| RWL | BCBS of Massachusetts (MA) |
| RWM | Horizon BCBS of New Jersey (NJ) |
| RWN | Unassigned Prefix |
| RWO | Highmark BCBS of Pennsylvania (PA) |
| RWP | Anthem Blue Cross(BC) of California (CA) |
| RWQ | Unassigned Prefix |
| RWR | Wellmark |
| RWS | BCBS of Minnesota (MN) |
| RWT | Anthem BCBS of Missouri (MO) |
| RWU | Anthem BCBS of Missouri (MO) |
| RWV | Anthem BCBS of Missouri (MO) |
| RWW | Unassigned Prefix |
| RWX | Horizon BCBS of New Jersey (NJ) |
| RWY | Horizon BCBS of New Jersey (NJ) |
| RWZ | Anthem BCBS of Kentucky (KY) |
| RXA | BCBS of Texas (TX) |
| RXB | BCBS of Texas (TX) |
| RXC | BCBS of Texas (TX) |
| RXD | BCBS of Texas (TX) |
| RXE | BCBS of Illinois (IL) |
| RXF | Regence BCBS |
| RXG | Anthem BCBS of Connecticut (CT) |
| RXH | Unassigned Prefix |
| RXI | BCBS of Alabama (AL) |
| RXJ | Empire BCBS of New York (NY) |
| RXK | BCBS of Illinois (IL) |
| RXL | Unassigned Prefix |
| RXM | Unassigned Prefix |
| RXN | BCBS of Texas (TX) |
| RXO | Anthem Blue Cross(BC) of California (CA) |
| RXP | Unassigned Prefix |
| RXQ | Unassigned Prefix |
| RXR | Horizon BCBS of New Jersey (NJ) |
| RXS | Anthem BCBS of Ohio (OH) |
| RXT | BCBS Blue Care Network Michigan (MI) |
| RXU | Unassigned Prefix |
| RXV | Unassigned Prefix |
| RXW | Unassigned Prefix |
| RXX | BCBS of Illinois (IL) |
| RXY | Unassigned Prefix |
| RXZ | BCBS of Massachusetts (MA) |
| RYA | Unassigned Prefix |
| RYB | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| RYC | Anthem BCBS of Ohio (OH) |
| RYD | BCBS of Illinois (IL) |
| RYE | Anthem BCBS of Connecticut (CT) |
| RYF | BCBS of Illinois (IL) |
| RYG | Anthem BCBS of Ohio (OH) |
| RYH | Unassigned Prefix |
| RYI | Regence BCBS |
| RYJ | Horizon BCBS of New Jersey (NJ) |
| RYK | Anthem BCBS of Ohio (OH) |
| RYL | Anthem BCBS of Virginia (VA) |
| RYM | Unassigned Prefix |
| RYN | Unassigned Prefix |
| RYO | Anthem BCBS of Ohio (OH) |
| RYP | Unassigned Prefix |
| RYQ | Florida (FL) Blue |
| RYR | BCBS Blue Care Network Michigan (MI) |
| RYS | Unassigned Prefix |
| RYT | Blue shield(BS) of California (CA) |
| RYU | BCBS of Alabama (AL) |
| RYV | Anthem BCBS of Connecticut (CT) |
| RYW | Unassigned Prefix |
| RYX | Unassigned Prefix |
| RYY | Unassigned Prefix |
| RYZ | Unassigned Prefix |
| RZA | Anthem BCBS of Ohio (OH) |
| RZB | BCBS of Illinois (IL) |
| RZC | Unassigned Prefix |
| RZD | BCBS of Texas (TX) |
| RZE | BCBS of Illinois (IL) |
| RZF | Anthem BCBS of Indiana (IN) |
| RZG | Premera BCBS of Alaska (AK) |
| RZH | Wellmark |
| RZI | BCBS Blue Care Network Michigan (MI) |
| RZJ | Unassigned Prefix |
| RZK | BCBS of Illinois (IL) |
| RZL | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| RZM | BCBS of Tennessee (TN) |
| RZN | BCBS of Tennessee (TN) |
| RZO | Blue shield(BS) of California (CA) |
| RZP | BCBS of Alabama (AL) |
| RZQ | Unassigned Prefix |
| RZR | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| RZS | Unassigned Prefix |
| RZT | Anthem BCBS of Connecticut (CT) |
| RZU | BCBS of Illinois (IL) |
| RZV | Anthem BCBS of Ohio (OH) |
| RZW | BCBS of Western New York (WNY) |
| RZX | Unassigned Prefix |
| RZY | BCBS of Western New York (WNY) |
| RZZ | Anthem BCBS of Missouri (MO) |
