All assignees
778 prefixes in 423 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 423-600 | APISON | 318J | 2007-03-19 | Yes |
| 423-601 | BULLS GAP | 9419 | 2005-02-03 | Yes |
| 423-602 | CHATTNOOGA | 551G | 2012-06-08 | Yes |
| 423-603 | FORK RIDGE | 516C | 2013-12-13 | Yes |
| 423-604 | ETOWAH | 525E | — | Yes |
| 423-605 | CHATTNOOGA | 6673 | — | — |
| 423-606 | ENGLEWOOD | 318J | 2007-02-26 | Yes |
| 423-607 | LIMESTONE | 6673 | 2014-02-17 | Yes |
| 423-608 | NEWPORT | 6673 | — | — |
| 423-609 | GREENEVL | 6673 | 2014-08-12 | Yes |
| 423-610 | JOHNSON CY | 4510 | — | — |
| 423-611 | XXXXXXXXXX | MULT | — | — |
| 423-612 | BRISTOL | 6673 | — | — |
| 423-613 | NEWPORT | 9419 | — | Yes |
| 423-614 | CLEVELAND | 9419 | — | — |
| 423-615 | COLLEGEDL | 318J | 2007-03-19 | Yes |
| 423-616 | MORRISTOWN | 525E | 2014-08-18 | Yes |
| 423-617 | ATHENS | 7476 | 2013-10-07 | Yes |
| 423-618 | CHATTNOOGA | 6673 | — | — |
| 423-619 | CHATTNOOGA | 6673 | — | — |
| 423-620 | GREENEVL | 6673 | — | Yes |
| 423-621 | MORRISTOWN | 6673 | — | Yes |
| 423-622 | CHATTNOOGA | 9419 | — | — |
| 423-623 | NEWPORT | 9419 | — | — |
| 423-624 | CHATTNOOGA | 9419 | — | — |
| 423-625 | NEWPORT | 9419 | — | — |
| 423-626 | NEWTAZWELL | 0557 | — | — |
| 423-627 | ROBBINS | 0565 | — | Yes |
| 423-628 | SUNBRIGHT | 0565 | — | — |
| 423-629 | CHATTNOOGA | 9419 | — | — |
| 423-630 | JOHNSON CY | 239E | 2007-09-25 | — |
| 423-631 | JOHNSON CY | 792K | 2008-04-08 | Yes |
| 423-632 | WARTBURG | 204G | 2019-06-24 | Yes |
| 423-633 | CHATTNOOGA | 073H | 2019-12-17 | Yes |
| 423-634 | CHATTNOOGA | 9419 | — | — |
| 423-635 | CHATTNOOGA | 6214 | — | Yes |
| 423-636 | GREENEVL | 4510 | — | — |
| 423-637 | CHATTNOOGA | 6673 | 2008-06-09 | Yes |
| 423-638 | GREENEVL | 4510 | — | — |
| 423-639 | GREENEVL | 4510 | — | — |
| 423-640 | SNEEDVILLE | 7421 | 2020-03-27 | Yes |
| 423-641 | CLEVELAND | 124F | 2014-04-07 | Yes |
| 423-642 | CHATTNOOGA | 9419 | — | — |
| 423-643 | CHATTNOOGA | 4645 | 2002-08-14 | — |
| 423-644 | SODDYDAISY | 6214 | 2020-03-09 | Yes |
| 423-645 | CHATTNOOGA | 6214 | — | — |
| 423-646 | BRISTOL | 8645 | — | Yes |
| 423-647 | BUTLER | 8645 | — | Yes |
| 423-648 | CHATTNOOGA | 4645 | — | — |
| 423-649 | ATHENS | 9419 | — | Yes |
| 423-650 | CLEVELAND | 6673 | — | Yes |
| 423-651 | JASPER | 073H | — | Yes |
| 423-652 | BRISTOL | 4510 | — | Yes |
| 423-653 | CHATTNOOGA | 6214 | — | — |
| 423-654 | CHATTNOOGA | 425J | 2020-07-21 | Yes |
| 423-655 | CHATTNOOGA | 6630 | — | — |
| 423-656 | JOHNSON CY | 425J | 2020-07-22 | Yes |
| 423-657 | MOSHEIM | 124F | 2015-01-28 | Yes |
| 423-658 | WHITWELL | 9419 | — | Yes |
| 423-659 | COPPERBSIN | 114F | 2020-08-04 | Yes |
| 423-660 | CHATTNOOGA | 506J | 2020-09-16 | Yes |
| 423-661 | CHATTNOOGA | 6673 | 2014-08-12 | Yes |
| 423-662 | BLOUNTVL | 525E | — | Yes |
| 423-663 | HUNTSVILLE | 0565 | — | Yes |
| 423-664 | CHATTNOOGA | 4806 | — | Yes |
| 423-665 | CHARLESTON | 4806 | 2004-10-26 | Yes |
| 423-666 | ELIZABTHTN | 525E | 2018-05-17 | Yes |
| 423-667 | CHATTNOOGA | 6673 | — | — |
| 423-668 | CHATTNOOGA | 9419 | — | Yes |
| 423-669 | BENTON | 525E | 2023-08-11 | Yes |
| 423-670 | JOHNSON CY | 515J | 2020-09-23 | Yes |
| 423-671 | CHATTNOOGA | 515J | 2020-09-29 | Yes |
| 423-672 | JOHNSON CY | 073H | 2019-12-27 | Yes |
| 423-673 | JOHNSON CY | 829J | 2021-04-13 | Yes |
| 423-674 | DAYTON | 525E | 2021-04-13 | Yes |
| 423-675 | JASPER | 525E | 2021-04-13 | Yes |
| 423-676 | JOHNSON CY | 8645 | — | Yes |
| 423-677 | FALLBRANCH | 8645 | — | Yes |
| 423-678 | ROAN MT | 525E | 2021-04-15 | Yes |
| 423-679 | OOLTEWAH | 525E | 2021-04-13 | Yes |
| 423-680 | CHATTNOOGA | 6673 | 2016-03-30 | Yes |
| 423-681 | CHATTNOOGA | 6673 | 2015-01-14 | Yes |
| 423-682 | CHATTNOOGA | 6673 | 2016-01-14 | Yes |
| 423-683 | PIKEVILLE | 6214 | 2026-03-12 | Yes |
| 423-684 | KINGSPORT | 124F | 2026-04-23 | Yes |
| 423-685 | BRISTOL | 6214 | 2026-06-18 | Yes |
| 423-686 | FORK RIDGE | 525E | 2021-04-15 | Yes |
| 423-687 | PIKEVILLE | 6214 | 2021-05-13 | Yes |
| 423-688 | SNEEDVILLE | 073H | 2021-05-17 | Yes |
| 423-689 | BRISTOL | 124F | 2021-07-01 | Yes |
| 423-690 | MORRISTOWN | 073H | 2016-12-02 | Yes |
| 423-691 | ATHENS | 525E | 2021-09-01 | Yes |
| 423-692 | BUTLER | 081J | 2021-09-01 | Yes |
| 423-693 | CHATTNOOGA | 4806 | 2006-05-19 | Yes |
| 423-694 | SWEETWATER | 7476 | 2021-09-08 | Yes |
| 423-695 | BRISTOL | 6214 | 2026-06-18 | Yes |
| 423-696 | ROGERSVL | 7476 | 2021-09-16 | Yes |
| 423-697 | CHATTNOOGA | 9419 | — | — |
| 423-698 | CHATTNOOGA | 9419 | — | — |
| 423-699 | CLEVELAND | 6673 | 2026-09-02 | 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.