| O2A | California | Anthem Blue-Cross |
| O2B | * | Unallocated/ Prefix Not Assigned |
| O2C | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| O2D | * | Unallocated/ Prefix Not Assigned |
| O2E | California | Anthem Blue-Cross |
| O2F | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| O2G | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| O2H | * | Unallocated/ Prefix Not Assigned |
| O2I | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| O2J | * | Unallocated/ Prefix Not Assigned |
| O2K | * | Unallocated/ Prefix Not Assigned |
| O2L | * | Unallocated/ Prefix Not Assigned |
| O2M | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| O2N | West Virginia | Highmark Blue-Cross Blue-Shield of West Virginia |
| O2O | * | Unallocated/ Prefix Not Assigned |
| O2P | * | Unallocated/ Prefix Not Assigned |
| O2Q | * | Unallocated/ Prefix Not Assigned |
| O2R | * | Unallocated/ Prefix Not Assigned |
| O2S | Massachusetts | Blue-Cross Blue-Shield of Massachusetts |
| O2T | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| O2U | * | Unallocated/ Prefix Not Assigned |
| O2V | * | Unallocated/ Prefix Not Assigned |
| O2W | * | Unallocated/ Prefix Not Assigned |
| O2X | * | Unallocated/ Prefix Not Assigned |
| O2Y | * | Unallocated/ Prefix Not Assigned |
| O2Z | * | Unallocated/ Prefix Not Assigned |
| O3A | * | Unallocated/ Prefix Not Assigned |
| O3B | Alaska | Premera Blue-Cross Blue-Shield of Alaska |
| O3C | * | Unallocated/ Prefix Not Assigned |
| O3D | * | Unallocated/ Prefix Not Assigned |
| O3E | * | Unallocated/ Prefix Not Assigned |
| O3F | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| O3G | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| O3H | * | Unallocated/ Prefix Not Assigned |
| O3I | * | Unallocated/ Prefix Not Assigned |
| O3J | * | Unallocated/ Prefix Not Assigned |
| O3K | * | Unallocated/ Prefix Not Assigned |
| O3L | * | Unallocated/ Prefix Not Assigned |
| O3M | * | Unallocated/ Prefix Not Assigned |
| O3N | Virginia | Anthem Blue-Cross Blue-Shield of Virginia |
| O3O | * | Unallocated/ Prefix Not Assigned |
| O3P | * | Unallocated/ Prefix Not Assigned |
| O3Q | * | Unallocated/ Prefix Not Assigned |
| O3R | * | Unallocated/ Prefix Not Assigned |
| O3S | * | Unallocated/ Prefix Not Assigned |
| O3T | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| O3U | * | Unallocated/ Prefix Not Assigned |
| O3V | Alaska | Premera Blue-Cross Blue-Shield of Alaska |
| O3W | Georgia | Anthem Blue-Cross Blue-Shield of Georgia |
| O3X | * | Unallocated/ Prefix Not Assigned |
| O3Y | * | Unallocated/ Prefix Not Assigned |
| O3Z | * | Unallocated/ Prefix Not Assigned |
| O4A | * | Unallocated/ Prefix Not Assigned |
| O4B | * | Unallocated/ Prefix Not Assigned |
| O4C | * | Unallocated/ Prefix Not Assigned |
| O4D | * | Unallocated/ Prefix Not Assigned |
| O4E | * | Unallocated/ Prefix Not Assigned |
| O4F | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| O4G | * | Unallocated/ Prefix Not Assigned |
| O4H | * | Unallocated/ Prefix Not Assigned |
| O4I | * | Unallocated/ Prefix Not Assigned |
| O4J | * | Unallocated/ Prefix Not Assigned |
| O4K | * | Unallocated/ Prefix Not Assigned |
| O4L | * | Unallocated/ Prefix Not Assigned |
| O4M | * | Unallocated/ Prefix Not Assigned |
| O4N | * | Unallocated/ Prefix Not Assigned |
| O4O | * | Unallocated/ Prefix Not Assigned |
| O4P | * | Unallocated/ Prefix Not Assigned |
| O4Q | * | Unallocated/ Prefix Not Assigned |
| O4R | Oregon/Idaho/Utah/Washington | Regence Blue-Cross Blue-Shield |
| O4S | * | Unallocated/ Prefix Not Assigned |
| O4T | * | Unallocated/ Prefix Not Assigned |
| O4U | * | Unallocated/ Prefix Not Assigned |
| O4V | * | Unallocated/ Prefix Not Assigned |
| O4W | * | Unallocated/ Prefix Not Assigned |
| O4X | * | Unallocated/ Prefix Not Assigned |
| O4Y | * | Unallocated/ Prefix Not Assigned |
| O4Z | * | Unallocated/ Prefix Not Assigned |
| O5A | * | Unallocated/ Prefix Not Assigned |
| O5B | * | Unallocated/ Prefix Not Assigned |
| O5C | * | Unallocated/ Prefix Not Assigned |
| O5D | * | Unallocated/ Prefix Not Assigned |
| O5E | * | Unallocated/ Prefix Not Assigned |
| O5F | * | Unallocated/ Prefix Not Assigned |
| O5G | * | Unallocated/ Prefix Not Assigned |
| O5H | * | Unallocated/ Prefix Not Assigned |
| O5I | * | Unallocated/ Prefix Not Assigned |
| O5J | * | Unallocated/ Prefix Not Assigned |
| O5K | * | Unallocated/ Prefix Not Assigned |
| O5L | * | Unallocated/ Prefix Not Assigned |
| O5M | * | Unallocated/ Prefix Not Assigned |
| O5N | * | Unallocated/ Prefix Not Assigned |
| O5O | * | Unallocated/ Prefix Not Assigned |
| O5P | * | Unallocated/ Prefix Not Assigned |
| O5Q | * | Unallocated/ Prefix Not Assigned |
| O5R | * | Unallocated/ Prefix Not Assigned |
| O5S | * | Unallocated/ Prefix Not Assigned |
| O5T | * | Unallocated/ Prefix Not Assigned |
| O5U | * | Unallocated/ Prefix Not Assigned |
| O5V | * | Unallocated/ Prefix Not Assigned |
| O5W | * | Unallocated/ Prefix Not Assigned |
| O5X | * | Unallocated/ Prefix Not Assigned |
| O5Y | * | Unallocated/ Prefix Not Assigned |
| O5Z | * | Unallocated/ Prefix Not Assigned |
| O6A | * | Unallocated/ Prefix Not Assigned |
| O6B | * | Unallocated/ Prefix Not Assigned |
| O6C | * | Unallocated/ Prefix Not Assigned |
| O6D | * | Unallocated/ Prefix Not Assigned |
| O6E | * | Unallocated/ Prefix Not Assigned |
| O6F | * | Unallocated/ Prefix Not Assigned |
| O6G | * | Unallocated/ Prefix Not Assigned |
| O6H | Alaska | Premera Blue-Cross of Alaska |
| O6I | * | Unallocated/ Prefix Not Assigned |
| O6J | * | Unallocated/ Prefix Not Assigned |
| O6K | * | Unallocated/ Prefix Not Assigned |
| O6L | * | Unallocated/ Prefix Not Assigned |
| O6M | * | Unallocated/ Prefix Not Assigned |
| O6N | * | Unallocated/ Prefix Not Assigned |
| O6O | * | Unallocated/ Prefix Not Assigned |
| O6P | * | Unallocated/ Prefix Not Assigned |
| O6Q | * | Unallocated/ Prefix Not Assigned |
| O6R | * | Unallocated/ Prefix Not Assigned |
| O6S | * | Unallocated/ Prefix Not Assigned |
| O6T | * | Unallocated/ Prefix Not Assigned |
| O6U | * | Unallocated/ Prefix Not Assigned |
| O6V | * | Unallocated/ Prefix Not Assigned |
| O6W | * | Unallocated/ Prefix Not Assigned |
| O6X | * | Unallocated/ Prefix Not Assigned |
| O6Y | * | Unallocated/ Prefix Not Assigned |
| O6Z | * | Unallocated/ Prefix Not Assigned |
| O7A | * | Unallocated/ Prefix Not Assigned |
| O7B | * | Unallocated/ Prefix Not Assigned |
| O7C | * | Unallocated/ Prefix Not Assigned |
| O7D | * | Unallocated/ Prefix Not Assigned |
| O7E | * | Unallocated/ Prefix Not Assigned |
| O7F | * | Unallocated/ Prefix Not Assigned |
| O7G | * | Unallocated/ Prefix Not Assigned |
| O7H | * | Unallocated/ Prefix Not Assigned |
| O7I | * | Unallocated/ Prefix Not Assigned |
| O7J | * | Unallocated/ Prefix Not Assigned |
| O7K | * | Unallocated/ Prefix Not Assigned |
| O7L | * | Unallocated/ Prefix Not Assigned |
| O7M | * | Unallocated/ Prefix Not Assigned |
| O7N | * | Unallocated/ Prefix Not Assigned |
| O7O | * | Unallocated/ Prefix Not Assigned |
| O7P | * | Unallocated/ Prefix Not Assigned |
| O7Q | * | Unallocated/ Prefix Not Assigned |
| O7R | * | Unallocated/ Prefix Not Assigned |
| O7S | * | Unallocated/ Prefix Not Assigned |
| O7T | * | Unallocated/ Prefix Not Assigned |
| O7U | * | Unallocated/ Prefix Not Assigned |
| O7V | * | Unallocated/ Prefix Not Assigned |
| O7W | * | Unallocated/ Prefix Not Assigned |
| O7X | * | Unallocated/ Prefix Not Assigned |
| O7Y | * | Unallocated/ Prefix Not Assigned |
| O7Z | * | Unallocated/ Prefix Not Assigned |
| O8A | * | Unallocated/ Prefix Not Assigned |
| O8B | * | Unallocated/ Prefix Not Assigned |
| O8C | * | Unallocated/ Prefix Not Assigned |
| O8D | * | Unallocated/ Prefix Not Assigned |
| O8E | * | Unallocated/ Prefix Not Assigned |
| O8F | * | Unallocated/ Prefix Not Assigned |
| O8G | * | Unallocated/ Prefix Not Assigned |
| O8H | * | Unallocated/ Prefix Not Assigned |
| O8I | * | Unallocated/ Prefix Not Assigned |
| O8J | * | Unallocated/ Prefix Not Assigned |
| O8K | * | Unallocated/ Prefix Not Assigned |
| O8L | * | Unallocated/ Prefix Not Assigned |
| O8M | * | Unallocated/ Prefix Not Assigned |
| O8N | * | Unallocated/ Prefix Not Assigned |
| O8O | * | Unallocated/ Prefix Not Assigned |
| O8P | * | Unallocated/ Prefix Not Assigned |
| O8Q | * | Unallocated/ Prefix Not Assigned |
| O8R | * | Unallocated/ Prefix Not Assigned |
| O8S | * | Unallocated/ Prefix Not Assigned |
| O8T | * | Unallocated/ Prefix Not Assigned |
| O8U | * | Unallocated/ Prefix Not Assigned |
| O8V | * | Unallocated/ Prefix Not Assigned |
| O8W | * | Unallocated/ Prefix Not Assigned |
| O8X | * | Unallocated/ Prefix Not Assigned |
| O8Y | * | Unallocated/ Prefix Not Assigned |
| O8Z | * | Unallocated/ Prefix Not Assigned |
| O9A | * | Unallocated/ Prefix Not Assigned |
| O9B | * | Unallocated/ Prefix Not Assigned |
| O9C | * | Unallocated/ Prefix Not Assigned |
| O9D | * | Unallocated/ Prefix Not Assigned |
| O9E | * | Unallocated/ Prefix Not Assigned |
| O9F | * | Unallocated/ Prefix Not Assigned |
| O9G | * | Unallocated/ Prefix Not Assigned |
| O9H | * | Unallocated/ Prefix Not Assigned |
| O9I | * | Unallocated/ Prefix Not Assigned |
| O9J | * | Unallocated/ Prefix Not Assigned |
| O9K | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| O9L | Minnesota | Blue-Cross Blue-Shield of Minnesota |
| O9M | * | Unallocated/ Prefix Not Assigned |
| O9N | * | Unallocated/ Prefix Not Assigned |
| O9O | * | Unallocated/ Prefix Not Assigned |
| O9P | * | Unallocated/ Prefix Not Assigned |
| O9Q | * | Unallocated/ Prefix Not Assigned |
| O9R | * | Unallocated/ Prefix Not Assigned |
| O9S | * | Unallocated/ Prefix Not Assigned |
| O9T | * | Unallocated/ Prefix Not Assigned |
| O9U | * | Unallocated/ Prefix Not Assigned |
| O9V | * | Unallocated/ Prefix Not Assigned |
| O9W | * | Unallocated/ Prefix Not Assigned |
| O9X | * | Unallocated/ Prefix Not Assigned |
| O9Y | * | Unallocated/ Prefix Not Assigned |
| O9Z | * | Unallocated/ Prefix Not Assigned |
