All assignees
782 prefixes in 313 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 313-200 | DETROITZN1 | 2964 | 2022-01-10 | Yes |
| 313-201 | DETROITZN4 | 9748 | — | — |
| 313-202 | DETROITZN1 | 770E | — | Yes |
| 313-203 | DETROITZN6 | 770E | — | Yes |
| 313-204 | DETROITZN5 | 6534 | — | — |
| 313-205 | DETROITZN5 | 2964 | — | Yes |
| 313-206 | DETROITZN6 | 9323 | — | — |
| 313-207 | DETROITZN5 | 2964 | — | Yes |
| 313-208 | DETROITZN1 | 5562 | — | Yes |
| 313-209 | DETROITZN1 | 933G | 2013-03-11 | Yes |
| 313-210 | DETROITZN1 | 598J | 2023-05-26 | Yes |
| 313-211 | XXXXXXXXXX | MULT | — | — |
| 313-212 | DETROITZN5 | 6534 | — | — |
| 313-213 | DETROITZN6 | 2964 | — | — |
| 313-214 | DETROITZN5 | 2964 | 2013-05-29 | Yes |
| 313-215 | DETROITZN5 | 2964 | — | Yes |
| 313-216 | DETROITZN6 | 7279 | — | Yes |
| 313-217 | DETROITZN2 | 991E | 2018-07-11 | Yes |
| 313-218 | DETROITZN5 | 2964 | — | Yes |
| 313-219 | DETROITZN5 | 6630 | — | — |
| 313-220 | DETROITZN5 | 2964 | — | Yes |
| 313-221 | DETROITZN1 | 9323 | 2005-06-17 | Yes |
| 313-222 | DETROITZN1 | 9323 | — | — |
| 313-223 | DETROITZN1 | 9323 | — | — |
| 313-224 | DETROITZN1 | 9323 | — | — |
| 313-225 | DETROITZN1 | 9323 | — | — |
| 313-226 | DETROITZN1 | 9323 | — | — |
| 313-227 | DETROITZN1 | 9323 | — | — |
| 313-228 | DETROITZN6 | 6120 | — | Yes |
| 313-229 | DETROITZN5 | 2964 | 2012-07-12 | Yes |
| 313-230 | DETROITZN1 | 7279 | — | Yes |
| 313-231 | DETROITZN6 | 2964 | — | — |
| 313-232 | DETROITZN5 | 9323 | — | — |
| 313-233 | DETROITZN5 | 9323 | — | — |
| 313-234 | DETROITZN1 | 9323 | — | Yes |
| 313-235 | DETROITZN1 | 9323 | — | — |
| 313-236 | DETROITZN5 | 6003 | 2012-09-28 | Yes |
| 313-237 | DETROITZN1 | 9323 | — | — |
| 313-238 | DETROITZN5 | 6630 | — | — |
| 313-239 | DETROITZN5 | 6630 | — | — |
| 313-240 | DETROITZN6 | 9323 | — | Yes |
| 313-241 | DETROITZN4 | 543C | 2012-02-08 | Yes |
| 313-242 | DETROITZN5 | 829J | — | Yes |
| 313-243 | DETROITZN4 | 829J | — | Yes |
| 313-244 | DETROITZN5 | 6534 | — | Yes |
| 313-245 | DETROITZN2 | 9323 | — | — |
| 313-246 | DETROITZN5 | 991E | 2013-10-24 | Yes |
| 313-247 | DETROITZN6 | 2964 | — | — |
| 313-248 | DETROITZN6 | 9323 | — | — |
| 313-249 | DETROITZN5 | 9323 | — | — |
| 313-250 | DETROITZN5 | 6630 | — | — |
| 313-251 | DETROITZN6 | 543C | 2015-12-24 | Yes |
| 313-252 | DETROITZN3 | 9323 | — | — |
| 313-253 | DETROITZN6 | 9323 | — | Yes |
| 313-254 | DETROITZN6 | 6120 | — | Yes |
| 313-255 | DETROITZN5 | 9323 | — | — |
| 313-256 | DETROITZN1 | 9323 | — | Yes |
| 313-257 | DETROITZN3 | 5562 | 2018-09-20 | Yes |
| 313-258 | DETROITZN6 | 2964 | — | — |
| 313-259 | DETROITZN1 | 9323 | — | — |
| 313-260 | DETROITZN5 | 9748 | — | — |
| 313-261 | DETROITZN1 | 991E | — | Yes |
| 313-262 | DETROITZN1 | 7279 | — | Yes |
| 313-263 | DETROITZN1 | 6120 | — | Yes |
| 313-264 | DETROITZN2 | 2964 | 2013-05-28 | Yes |
| 313-265 | DETROITZN1 | 2964 | 2013-06-12 | Yes |
| 313-266 | DETROITZN6 | 2964 | 2014-08-08 | Yes |
| 313-267 | DETROITZN2 | 9323 | — | — |
| 313-268 | DETROITZN5 | 6003 | — | — |
| 313-269 | DETROITZN5 | 6003 | — | — |
| 313-270 | DETROITZN4 | 9323 | — | Yes |
| 313-271 | DETROITZN6 | 9323 | — | — |
| 313-272 | DETROITZN4 | 9323 | — | — |
| 313-273 | DETROITZN4 | 9323 | — | — |
| 313-274 | DETROITZN6 | 9323 | — | — |
| 313-275 | DETROITZN5 | 9323 | — | — |
| 313-276 | DETROITZN5 | 6630 | — | — |
| 313-277 | DETROITZN6 | 9323 | — | Yes |
| 313-278 | DETROITZN6 | 9323 | — | — |
| 313-279 | DETROITZN4 | 6120 | — | Yes |
| 313-280 | DETROITZN1 | 6630 | — | — |
| 313-281 | DETROITZN3 | 6120 | — | Yes |
| 313-282 | DETROITZN5 | 2964 | — | Yes |
| 313-283 | DETROITZN5 | 2964 | — | Yes |
| 313-284 | DETROITZN2 | 991E | 2016-04-14 | Yes |
| 313-285 | DETROITZN1 | 543C | — | Yes |
| 313-286 | DETROITZN5 | 7279 | — | Yes |
| 313-287 | DETROITZN5 | 2964 | 2011-08-31 | Yes |
| 313-288 | DETROITZN4 | 829J | 2009-04-14 | Yes |
| 313-289 | DETROITZN6 | 2964 | — | — |
| 313-290 | DETROITZN2 | 2964 | 2015-05-21 | Yes |
| 313-291 | DETROITZN6 | 9323 | — | — |
| 313-292 | DETROITZN6 | 9323 | — | — |
| 313-293 | DETROITZN1 | 5562 | — | Yes |
| 313-294 | DETROITZN6 | 9323 | — | Yes |
| 313-295 | DETROITZN6 | 9323 | — | — |
| 313-296 | DETROITZN5 | 6003 | 2012-12-26 | Yes |
| 313-297 | DETROITZN6 | 9323 | — | — |
| 313-298 | DETROITZN1 | 9323 | — | — |
| 313-299 | DETROITZN6 | 9323 | — | 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.