| 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 |