All assignees
782 prefixes in 313 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 313-300 | DETROITZN5 | 6003 | — | — |
| 313-301 | DETROITZN5 | 6003 | 2025-01-03 | Yes |
| 313-302 | DETROITZN5 | 9323 | — | — |
| 313-303 | DETROITZN5 | 6534 | — | — |
| 313-304 | DETROITZN5 | 2964 | — | Yes |
| 313-305 | DETROITZN3 | 829J | — | Yes |
| 313-306 | DETROITZN4 | 991E | 2018-09-24 | Yes |
| 313-307 | DETROITZN4 | 543C | 2013-09-19 | Yes |
| 313-308 | DETROITZN2 | 829J | — | Yes |
| 313-309 | DETROITZN1 | 829J | — | Yes |
| 313-310 | DETROITZN5 | 6534 | — | — |
| 313-311 | XXXXXXXXXX | MULT | — | — |
| 313-312 | DETROITZN3 | 829J | 2009-10-16 | Yes |
| 313-313 | DETROITZN6 | 883K | 2026-01-13 | Yes |
| 313-314 | DETROITZN3 | 991E | 2016-04-15 | Yes |
| 313-315 | DETROITZN5 | 2964 | 2013-06-26 | Yes |
| 313-316 | DETROITZN5 | 6003 | — | — |
| 313-317 | DETROITZN6 | 9323 | — | — |
| 313-318 | DETROITZN5 | 6534 | — | — |
| 313-319 | DETROITZN5 | 6003 | — | — |
| 313-320 | DETROITZN5 | 6534 | — | — |
| 313-321 | DETROITZN5 | 6630 | — | — |
| 313-322 | DETROITZN6 | 9323 | — | — |
| 313-323 | DETROITZN6 | 9323 | — | — |
| 313-324 | DETROITZN1 | 770E | — | Yes |
| 313-325 | DETROITZN4 | 9748 | — | — |
| 313-326 | DETROITZN5 | 2964 | 2013-05-29 | Yes |
| 313-327 | DETROITZN3 | 2964 | 2013-05-28 | Yes |
| 313-328 | DETROITZN5 | 6630 | — | — |
| 313-329 | DETROITZN1 | 2964 | — | Yes |
| 313-330 | DETROITZN5 | 6534 | — | — |
| 313-331 | DETROITZN2 | 9323 | — | Yes |
| 313-332 | DETROITZN2 | 6120 | — | Yes |
| 313-333 | DETROITZN5 | 2964 | — | Yes |
| 313-334 | DETROITZN3 | 6120 | — | Yes |
| 313-335 | DETROITZN1 | 9323 | — | Yes |
| 313-336 | DETROITZN6 | 9323 | — | — |
| 313-337 | DETROITZN6 | 9323 | — | — |
| 313-338 | DETROITZN1 | 9323 | 2011-10-11 | Yes |
| 313-339 | DETROITZN5 | 6534 | 2025-01-13 | Yes |
| 313-340 | DETROITZN4 | 9323 | — | Yes |
| 313-341 | DETROITZN4 | 9323 | — | — |
| 313-342 | DETROITZN4 | 9323 | — | — |
| 313-343 | DETROITZN2 | 9323 | — | Yes |
| 313-344 | DETROITZN2 | 6120 | — | Yes |
| 313-345 | DETROITZN4 | 9323 | — | — |
| 313-346 | DETROITZN3 | 6120 | — | Yes |
| 313-347 | DETROITZN2 | 7279 | — | Yes |
| 313-348 | DETROITZN5 | 6003 | — | — |
| 313-349 | DETROITZN3 | 2964 | 2013-12-03 | Yes |
| 313-350 | DETROITZN5 | 2964 | — | Yes |
| 313-351 | DETROITZN3 | 770E | 2018-09-26 | Yes |
| 313-352 | DETROITZN5 | 2964 | 2012-07-12 | Yes |
| 313-353 | DETROITZN5 | 2964 | 2012-08-29 | Yes |
| 313-354 | DETROITZN5 | 6534 | — | Yes |
| 313-355 | DETROITZN1 | 991E | 2008-10-09 | Yes |
| 313-356 | DETROITZN3 | 2964 | 2016-06-14 | Yes |
| 313-357 | DETROITZN6 | 829J | — | — |
| 313-358 | DETROITZN6 | 2964 | 2009-10-20 | Yes |
| 313-359 | DETROITZN6 | 9323 | — | Yes |
| 313-360 | DETROITZN1 | 770E | 2021-11-05 | Yes |
| 313-361 | DETROITZN1 | 9323 | — | — |
| 313-362 | DETROITZN5 | 829J | — | Yes |
| 313-363 | DETROITZN5 | 2964 | — | Yes |
| 313-364 | DETROITZN4 | 991E | 2018-03-30 | Yes |
| 313-365 | DETROITZN3 | 9323 | — | Yes |
| 313-366 | DETROITZN3 | 9323 | — | — |
| 313-367 | DETROITZN4 | 2964 | 2013-05-28 | Yes |
| 313-368 | DETROITZN3 | 9323 | — | — |
| 313-369 | DETROITZN3 | 9323 | — | — |
| 313-370 | DETROITZN4 | 2964 | 2023-03-03 | Yes |
| 313-371 | DETROITZN2 | 9323 | — | — |
| 313-372 | DETROITZN2 | 9323 | — | — |
| 313-373 | DETROITZN1 | 9323 | 2009-10-06 | Yes |
| 313-374 | DETROITZN6 | 2964 | 2013-05-28 | Yes |
| 313-375 | DETROITZN6 | 9323 | — | Yes |
| 313-376 | DETROITZN5 | 6630 | — | — |
| 313-377 | DETROITZN6 | 2964 | — | — |
| 313-378 | DETROITZN5 | 6003 | — | — |
| 313-379 | DETROITZN1 | 046L | 2017-02-22 | Yes |
| 313-380 | DETROITZN6 | 991E | 2021-01-11 | Yes |
| 313-381 | DETROITZN6 | 9323 | — | — |
| 313-382 | DETROITZN6 | 9323 | — | — |
| 313-383 | DETROITZN6 | 9323 | — | — |
| 313-384 | DETROITZN6 | 2964 | — | — |
| 313-385 | DETROITZN1 | 478J | 2020-04-22 | Yes |
| 313-386 | DETROITZN6 | 9323 | — | — |
| 313-387 | DETROITZN5 | 9323 | — | — |
| 313-388 | DETROITZN6 | 9323 | — | — |
| 313-389 | DETROITZN6 | 9323 | — | Yes |
| 313-390 | DETROITZN6 | 9323 | — | — |
| 313-391 | DETROITZN5 | 6003 | 2022-07-15 | Yes |
| 313-392 | DETROITZN1 | 9323 | — | Yes |
| 313-393 | DETROITZN1 | 9323 | — | — |
| 313-394 | DETROITZN1 | 9323 | — | Yes |
| 313-395 | DETROITZN6 | 2964 | 2014-10-23 | Yes |
| 313-396 | DETROITZN1 | 9323 | — | — |
| 313-397 | DETROITZN4 | 318J | 2006-02-01 | Yes |
| 313-398 | DETROITZN1 | 2964 | 2015-07-23 | Yes |
| 313-399 | DETROITZN5 | 2964 | — | 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.