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81 prefixes in 504 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 504-217 | KENNER | 150C | 2011-08-31 | Yes |
| 504-221 | KENNER | 150C | 2011-06-08 | Yes |
| 504-222 | KENNER | 150C | 2010-11-09 | Yes |
| 504-229 | KENNER | 150C | 2011-10-14 | Yes |
| 504-230 | KENNER | 150C | 2011-06-13 | Yes |
| 504-231 | KENNER | 150C | — | Yes |
| 504-236 | KENNER | 150C | — | Yes |
| 504-237 | KENNER | 150C | — | Yes |
| 504-251 | KENNER | 150C | — | Yes |
| 504-261 | NEWORLEANS | 150C | 2001-10-30 | — |
| 504-287 | KENNER | 150C | — | Yes |
| 504-292 | KENNER | 150C | 2002-01-17 | Yes |
| 504-296 | KENNER | 150C | — | Yes |
| 504-300 | NEWORLEANS | 150C | 2010-10-12 | Yes |
| 504-307 | KENNER | 150C | 2008-01-28 | Yes |
| 504-316 | NEWORLEANS | 150C | 2011-10-20 | Yes |
| 504-317 | KENNER | 150C | 2011-03-11 | Yes |
| 504-319 | KENNER | 150C | — | Yes |
| 504-326 | NEWORLEANS | 150C | 2017-03-15 | Yes |
| 504-327 | KENNER | 150C | 2010-06-16 | Yes |
| 504-329 | NEWORLEANS | 150C | 2002-03-12 | Yes |
| 504-331 | KENNER | 150C | 2008-03-03 | Yes |
| 504-333 | NEWORLEANS | 150C | 2006-01-05 | Yes |
| 504-334 | NEWORLEANS | 150C | 2017-03-16 | Yes |
| 504-338 | KENNER | 150C | 2001-08-24 | Yes |
| 504-339 | KENNER | 150C | 2001-10-30 | — |
| 504-344 | NEWORLEANS | 150C | 2005-12-12 | Yes |
| 504-345 | NEWORLEANS | 150C | 2010-06-07 | Yes |
| 504-346 | KENNER | 150C | 2010-10-14 | Yes |
| 504-351 | NEWORLEANS | 150C | 2011-10-20 | Yes |
| 504-357 | NEWORLEANS | 150C | 2011-08-31 | Yes |
| 504-358 | NEWORLEANS | 150C | 2007-05-31 | Yes |
| 504-360 | KENNER | 150C | 2012-01-24 | Yes |
| 504-373 | NEWORLEANS | 150C | 2006-02-22 | Yes |
| 504-382 | NEWORLEANS | 150C | — | Yes |
| 504-385 | KENNER | 150C | 2011-10-20 | Yes |
| 504-397 | KENNER | 150C | 2021-10-13 | Yes |
| 504-405 | KENNER | 150C | 2012-02-03 | Yes |
| 504-408 | NEWORLEANS | 150C | 2012-03-01 | Yes |
| 504-409 | KENNER | 150C | 2022-01-12 | Yes |
| 504-413 | NEWORLEANS | 150C | 2012-03-28 | Yes |
| 504-415 | NEWORLEANS | 150C | — | Yes |
| 504-416 | NEWORLEANS | 150C | — | Yes |
| 504-435 | NEWORLEANS | 150C | — | Yes |
| 504-473 | KENNER | 150C | — | Yes |
| 504-478 | NEWORLEANS | 150C | 2013-02-28 | Yes |
| 504-502 | KENNER | 150C | 2011-10-20 | Yes |
| 504-505 | NEWORLEANS | 150C | 2013-01-30 | Yes |
| 504-509 | NEWORLEANS | 150C | 2014-10-30 | Yes |
| 504-535 | NEWORLEANS | 150C | — | Yes |
| 504-541 | NEWORLEANS | 150C | — | Yes |
| 504-563 | NEWORLEANS | 150C | 2011-12-13 | Yes |
| 504-575 | KENNER | 150C | 2008-03-03 | Yes |
| 504-600 | KENNER | 150C | 2010-11-09 | Yes |
| 504-606 | KENNER | 150C | — | Yes |
| 504-607 | KENNER | 150C | 2011-10-20 | Yes |
| 504-609 | NEWORLEANS | 150C | — | Yes |
| 504-610 | KENNER | 150C | — | Yes |
| 504-621 | KENNER | 150C | — | Yes |
| 504-628 | NEWORLEANS | 150C | — | Yes |
| 504-641 | KENNER | 150C | 2011-10-20 | Yes |
| 504-669 | KENNER | 150C | — | Yes |
| 504-699 | KENNER | 150C | 2011-05-05 | Yes |
| 504-701 | KENNER | 150C | — | Yes |
| 504-710 | KENNER | 150C | — | Yes |
| 504-723 | KENNER | 150C | — | Yes |
| 504-758 | NEWORLEANS | 150C | 2005-11-18 | Yes |
| 504-782 | KENNER | 150C | — | Yes |
| 504-784 | NEWORLEANS | 150C | — | Yes |
| 504-800 | KENNER | 150C | 2011-02-25 | Yes |
| 504-813 | KENNER | 150C | — | Yes |
| 504-905 | KENNER | 150C | — | Yes |
| 504-906 | KENNER | 150C | 2001-10-16 | Yes |
| 504-914 | KENNER | 150C | — | Yes |
| 504-915 | NEWORLEANS | 150C | — | Yes |
| 504-930 | NEWORLEANS | 150C | 2015-06-15 | Yes |
| 504-931 | NEWORLEANS | 150C | 2001-08-24 | — |
| 504-939 | KENNER | 150C | 2001-11-15 | Yes |
| 504-957 | KENNER | 150C | — | Yes |
| 504-975 | NEWORLEANS | 150C | 2001-10-30 | — |
| 504-994 | KENNER | 150C | 2001-10-02 | 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.