All assignees
800 prefixes in 773 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 773-600 | CHICGOZN10 | 6529 | 2004-07-20 | Yes |
| 773-601 | CHICGOZN11 | 9329 | — | — |
| 773-602 | CHICGOZN07 | 9329 | — | Yes |
| 773-603 | CHICGOZN10 | 6529 | 2005-06-30 | Yes |
| 773-604 | CHICGOZN02 | 9329 | — | — |
| 773-605 | CHICGOZN02 | 460K | 2006-04-05 | Yes |
| 773-606 | CHICGOZN03 | 6529 | 2005-07-14 | Yes |
| 773-607 | CHICGOZN01 | 6534 | — | Yes |
| 773-608 | CHICGOZN01 | 6534 | — | Yes |
| 773-609 | CHICGOZN10 | 224C | — | Yes |
| 773-610 | CHICGOZN03 | 6534 | 2001-10-17 | — |
| 773-611 | XXXXXXXXXX | MULT | — | — |
| 773-612 | CHICGOZN01 | 6534 | — | — |
| 773-613 | CHICGOZN01 | 6534 | — | Yes |
| 773-614 | CHICGOZN10 | 6529 | 2006-11-08 | Yes |
| 773-615 | CHICGOZN10 | 6529 | 2001-11-30 | Yes |
| 773-616 | CHICGOZN01 | 6529 | — | — |
| 773-617 | CHICGOZN01 | 6529 | — | — |
| 773-618 | CHICGOZN01 | 6534 | — | Yes |
| 773-619 | CHICGOZN03 | 6529 | 2001-03-09 | Yes |
| 773-620 | CHICGOZN03 | 6534 | — | — |
| 773-621 | CHICGOZN03 | 6529 | 2005-10-10 | Yes |
| 773-622 | CHICGOZN05 | 9329 | — | — |
| 773-623 | CHICGOZN01 | 6534 | — | Yes |
| 773-624 | CHICGOZN07 | 9329 | — | — |
| 773-625 | CHICGOZN05 | 9329 | — | — |
| 773-626 | CHICGOZN05 | 9329 | — | — |
| 773-627 | CHICGOZN08 | 829J | 2001-04-12 | Yes |
| 773-628 | CHICGOZN03 | 7136 | — | Yes |
| 773-629 | CHICGOZN10 | 6529 | 2006-11-08 | Yes |
| 773-630 | CHICGOZN03 | 6534 | 2009-03-10 | Yes |
| 773-631 | CHICGOZN03 | 9329 | — | — |
| 773-632 | CHICGOZN03 | 7196 | — | Yes |
| 773-633 | CHICGOZN07 | 6333 | — | Yes |
| 773-634 | CHICGOZN04 | 7196 | — | Yes |
| 773-635 | CHICGOZN06 | 6115 | — | Yes |
| 773-636 | CHICGOZN01 | 6333 | — | — |
| 773-637 | CHICGOZN05 | 9329 | — | — |
| 773-638 | CHICGOZN06 | 9329 | — | Yes |
| 773-639 | CHICGOZN03 | 6529 | 2007-10-17 | Yes |
| 773-640 | CHICGOZN06 | 829J | 2001-04-12 | Yes |
| 773-641 | CHICGOZN03 | 6529 | 2005-09-13 | Yes |
| 773-642 | CHICGOZN03 | 6529 | 2007-03-15 | Yes |
| 773-643 | CHICGOZN07 | 9329 | — | Yes |
| 773-644 | CHICGOZN02 | 7136 | 2011-01-05 | Yes |
| 773-645 | CHICGOZN04 | 9329 | — | Yes |
| 773-646 | CHICGOZN09 | 9329 | — | — |
| 773-647 | CHICGOZN03 | 6529 | 2007-10-17 | Yes |
| 773-648 | CHICGOZN06 | 829J | 2001-04-12 | Yes |
| 773-649 | CHICGOZN02 | 829J | 2001-04-12 | Yes |
| 773-650 | CHICGOZN06 | 9329 | — | — |
| 773-651 | CHICGOZN07 | 9329 | — | — |
| 773-652 | CHICGOZN01 | 6630 | — | — |
| 773-653 | CHICGOZN03 | 829J | — | Yes |
| 773-654 | CHICGOZN02 | 829J | 2001-04-12 | Yes |
| 773-655 | CHICGOZN03 | 6529 | 2002-03-27 | Yes |
| 773-656 | CHICGOZN10 | 6529 | 2005-06-30 | Yes |
| 773-657 | CHICGOZN03 | 6529 | 2007-03-05 | Yes |
| 773-658 | CHICGOZN05 | 6534 | — | Yes |
| 773-659 | CHICGOZN01 | 6534 | — | Yes |
| 773-660 | CHICGOZN10 | 9329 | — | — |
| 773-661 | CHICGOZN04 | 829J | 2001-04-12 | Yes |
| 773-662 | CHICGOZN01 | 6333 | — | Yes |
| 773-663 | CHICGOZN03 | 6529 | — | Yes |
| 773-664 | CHICGOZN05 | 829J | 2001-04-12 | Yes |
| 773-665 | CHICGOZN04 | 9329 | — | — |
| 773-666 | CHICGOZN04 | 984E | 2011-05-20 | Yes |
| 773-667 | CHICGOZN07 | 9329 | — | Yes |
| 773-668 | CHICGOZN05 | 6115 | 2006-04-27 | Yes |
| 773-669 | CHICGOZN05 | 984E | 2009-06-08 | Yes |
| 773-670 | CHICGOZN10 | 6534 | 2024-09-03 | Yes |
| 773-671 | CHICGOZN01 | 6529 | — | Yes |
| 773-672 | CHICGOZN10 | 6529 | 2008-02-29 | Yes |
| 773-673 | CHICGOZN05 | 829J | 2001-04-12 | Yes |
| 773-674 | CHICGOZN06 | 9329 | 2008-05-15 | Yes |
| 773-675 | CHICGOZN07 | 6333 | 2008-07-07 | Yes |
| 773-676 | CHICGOZN05 | 7136 | — | Yes |
| 773-677 | CHICGOZN03 | 6534 | 2002-03-07 | — |
| 773-678 | CHICGOZN03 | 6529 | 2005-02-21 | Yes |
| 773-679 | CHICGOZN10 | 6529 | 2006-07-26 | Yes |
| 773-680 | CHICGOZN03 | 6534 | 2001-02-02 | — |
| 773-681 | CHICGOZN02 | 7229 | — | Yes |
| 773-682 | CHICGOZN03 | 6333 | 2005-10-17 | Yes |
| 773-683 | CHICGOZN03 | 6534 | 2008-01-23 | Yes |
| 773-684 | CHICGOZN07 | 9329 | — | Yes |
| 773-685 | CHICGOZN03 | 9329 | — | — |
| 773-686 | CHICGOZN11 | 9329 | — | — |
| 773-687 | CHICGOZN04 | 7136 | — | Yes |
| 773-688 | CHICGOZN05 | 8702 | 2004-07-27 | Yes |
| 773-689 | CHICGOZN01 | 6333 | — | Yes |
| 773-690 | CHICGOZN07 | 6529 | 2008-11-05 | Yes |
| 773-691 | CHICGOZN08 | 6529 | 2007-07-10 | Yes |
| 773-692 | CHICGOZN04 | 224C | 2019-01-31 | Yes |
| 773-693 | CHICGOZN03 | 9329 | — | Yes |
| 773-694 | CHICGOZN11 | 9329 | — | Yes |
| 773-695 | CHICGOZN03 | 9329 | — | Yes |
| 773-696 | CHICGOZN06 | 829J | — | Yes |
| 773-697 | CHICGOZN04 | 829J | 2001-04-12 | Yes |
| 773-698 | CHICGOZN04 | 6529 | 2007-06-13 | Yes |
| 773-699 | CHICGOZN03 | 6529 | 2005-04-19 | 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.