All assignees
800 prefixes in 773 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 773-800 | CHICGOZN02 | 6115 | 2009-06-25 | Yes |
| 773-801 | CHICGOZN06 | 9329 | 2006-05-19 | Yes |
| 773-802 | CHICGOZN01 | 6333 | — | — |
| 773-803 | CHICGOZN03 | 6529 | 2007-03-15 | Yes |
| 773-804 | CHICGOZN05 | 9329 | — | Yes |
| 773-805 | CHICGOZN01 | 6333 | — | — |
| 773-806 | CHICGOZN01 | 6534 | — | Yes |
| 773-807 | CHICGOZN02 | 6529 | 2002-08-15 | — |
| 773-808 | CHICGOZN07 | 6529 | — | Yes |
| 773-809 | CHICGOZN03 | 6529 | 2008-09-08 | Yes |
| 773-810 | CHICGOZN01 | 6534 | — | Yes |
| 773-811 | XXXXXXXXXX | MULT | — | — |
| 773-812 | CHICGOZN03 | 6534 | 2009-03-23 | Yes |
| 773-813 | CHICGOZN01 | 6534 | — | Yes |
| 773-814 | CHICGOZN03 | 6529 | 2002-07-22 | — |
| 773-815 | CHICGOZN03 | 6534 | 2009-03-31 | Yes |
| 773-816 | CHICGOZN10 | 6529 | 2005-03-28 | Yes |
| 773-817 | CHICGOZN03 | 6529 | 2002-10-16 | — |
| 773-818 | CHICGOZN01 | 6529 | — | — |
| 773-819 | CHICGOZN07 | 224C | — | Yes |
| 773-820 | CHICGOZN01 | 6534 | — | Yes |
| 773-821 | CHICGOZN10 | 9329 | — | — |
| 773-822 | CHICGOZN06 | 6529 | — | Yes |
| 773-823 | CHICGOZN06 | 7136 | — | Yes |
| 773-824 | CHICGOZN03 | 7136 | — | Yes |
| 773-825 | CHICGOZN11 | 9329 | — | Yes |
| 773-826 | CHICGOZN06 | 9329 | — | — |
| 773-827 | CHICGOZN06 | 6529 | — | Yes |
| 773-828 | CHICGOZN02 | 6115 | — | Yes |
| 773-829 | CHICGOZN04 | 6115 | — | Yes |
| 773-830 | CHICGOZN05 | 7229 | — | Yes |
| 773-831 | CHICGOZN11 | 6115 | — | Yes |
| 773-832 | CHICGOZN04 | 9329 | — | Yes |
| 773-833 | CHICGOZN01 | 6333 | — | Yes |
| 773-834 | CHICGOZN07 | 9329 | — | — |
| 773-835 | CHICGOZN01 | 6333 | — | Yes |
| 773-836 | CHICGOZN05 | 9329 | — | Yes |
| 773-837 | CHICGOZN04 | 6529 | 2001-08-08 | — |
| 773-838 | CHICGOZN08 | 9329 | — | — |
| 773-839 | CHICGOZN04 | 224C | 2015-11-23 | Yes |
| 773-840 | CHICGOZN10 | 829J | 2006-06-23 | Yes |
| 773-841 | CHICGOZN01 | 6534 | — | — |
| 773-842 | CHICGOZN01 | 6529 | 2001-04-19 | Yes |
| 773-843 | CHICGOZN06 | 9329 | — | — |
| 773-844 | CHICGOZN03 | 6534 | 2001-05-25 | — |
| 773-845 | CHICGOZN01 | 9748 | 2001-04-23 | — |
| 773-846 | CHICGOZN07 | 9329 | — | — |
| 773-847 | CHICGOZN06 | 9329 | — | — |
| 773-848 | CHICGOZN01 | 6333 | — | — |
| 773-849 | CHICGOZN03 | 6333 | 2007-02-20 | Yes |
| 773-850 | CHICGOZN03 | 6333 | 2008-08-21 | Yes |
| 773-851 | CHICGOZN07 | 6529 | 2001-03-09 | Yes |
| 773-852 | CHICGOZN01 | 6534 | — | — |
| 773-853 | CHICGOZN03 | 6529 | 2006-10-03 | Yes |
| 773-854 | CHICGOZN05 | 9329 | — | Yes |
| 773-855 | CHICGOZN07 | 8702 | — | Yes |
| 773-856 | CHICGOZN02 | 8702 | — | — |
| 773-857 | CHICGOZN04 | 8702 | — | — |
| 773-858 | CHICGOZN02 | 6529 | 2001-07-06 | Yes |
| 773-859 | CHICGOZN01 | 6333 | — | Yes |
| 773-860 | CHICGOZN01 | 6534 | — | — |
| 773-861 | CHICGOZN03 | 6534 | 2024-09-03 | Yes |
| 773-862 | CHICGOZN04 | 9329 | — | Yes |
| 773-863 | CHICGOZN08 | 9329 | — | Yes |
| 773-864 | CHICGOZN03 | 9329 | — | Yes |
| 773-865 | CHICGOZN02 | 6529 | 2001-08-30 | — |
| 773-866 | CHICGOZN02 | 9329 | — | Yes |
| 773-867 | CHICGOZN03 | 9329 | — | Yes |
| 773-868 | CHICGOZN04 | 9329 | — | Yes |
| 773-869 | CHICGOZN06 | 9329 | — | Yes |
| 773-870 | CHICGOZN03 | 6534 | 2002-08-06 | Yes |
| 773-871 | CHICGOZN04 | 9329 | — | — |
| 773-872 | CHICGOZN04 | 224C | 2023-06-08 | Yes |
| 773-873 | CHICGOZN07 | 9329 | — | Yes |
| 773-874 | CHICGOZN07 | 9329 | — | — |
| 773-875 | CHICGOZN08 | 6529 | 2001-09-06 | — |
| 773-876 | CHICGOZN03 | 5562 | 2006-03-20 | Yes |
| 773-877 | CHICGOZN03 | 6529 | 2006-07-21 | Yes |
| 773-878 | CHICGOZN02 | 9329 | — | — |
| 773-879 | CHICGOZN01 | 6529 | — | Yes |
| 773-880 | CHICGOZN04 | 9329 | — | — |
| 773-881 | CHICGOZN10 | 9329 | — | — |
| 773-882 | CHICGOZN01 | 6333 | — | — |
| 773-883 | CHICGOZN04 | 9329 | — | — |
| 773-884 | CHICGOZN08 | 9329 | — | — |
| 773-885 | CHICGOZN03 | 6529 | 2005-03-08 | Yes |
| 773-886 | CHICGOZN07 | 6529 | 2007-10-31 | Yes |
| 773-887 | CHICGOZN05 | 7229 | — | Yes |
| 773-888 | CHICGOZN04 | 984E | 2009-06-25 | Yes |
| 773-889 | CHICGOZN05 | 9329 | — | — |
| 773-890 | CHICGOZN06 | 9329 | — | — |
| 773-891 | CHICGOZN07 | 318J | 2006-10-18 | Yes |
| 773-892 | CHICGOZN07 | 9329 | — | Yes |
| 773-893 | CHICGOZN06 | 7229 | — | Yes |
| 773-894 | CHICGOZN11 | 9329 | — | — |
| 773-895 | CHICGOZN01 | 6529 | 2001-08-30 | — |
| 773-896 | CHICGOZN07 | 7229 | — | Yes |
| 773-897 | CHICGOZN02 | 063E | 2008-03-28 | Yes |
| 773-898 | CHICGOZN01 | 6333 | — | Yes |
| 773-899 | CHICGOZN03 | 6333 | 2006-03-15 | Yes |
These are initial assignees from NANPA CO-code records — because of number portability, the current serving carrier of individual numbers may differ. Bulk export requires a membership.