NumberResearchRecent prefix assignments
369 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/18/2026
Which carriers received which NPA-NXX prefixes, and where. Assignments are initial assignments from NANPA records — because of number portability, the current serving carrier of individual numbers may differ. For finer-grained activity, see the thousands-block view above.
Most active assignees, last 30 days
New assignments by month
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| Assigned | NPA-NXX | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|
| 314-460 | SPOK, INC. | 6630 | ST LOUIS | MO | |
| 314-465 | SOUTHWESTERN BELL | 9533 | ST LOUIS | MO | |
| 314-466 | SOUTHWESTERN BELL | 9533 | ST LOUIS | MO | |
| 314-468 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO | 7432 | LADUE | MO | |
| 314-469 | SOUTHWESTERN BELL | 9533 | CREVECOEUR | MO | |
| 314-471 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO | 7432 | KIRKWOOD | MO | |
| 314-472 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO | 7432 | SAPPINGTON | MO | |
| 314-473 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO | 7432 | LADUE | MO | |
| 314-475 | ONVOY, LLC - MO | 093F | LADUE | MO | |
| 314-477 | T-MOBILE USA, INC. | 6529 | LADUE | MO | |
| 314-479 | T-MOBILE USA, INC. | 6529 | LADUE | MO | |
| 314-480 | SOUTHWESTERN BELL | 9533 | ST LOUIS | MO | |
| 314-481 | SOUTHWESTERN BELL | 9533 | ST LOUIS | MO | |
| 314-482 | T-MOBILE USA, INC. | 6529 | LADUE | MO | |
| 314-483 | AMERICAN MESSAGING SERVICES, LLC | 9748 | ST LOUIS | MO | |
| 314-484 | T-MOBILE USA, INC. | 6529 | LADUE | MO | |
| 314-485 | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | CREVECOEUR | MO | |
| 314-486 | T-MOBILE USA, INC. | 6529 | CREVECOEUR | MO | |
| 314-487 | SOUTHWESTERN BELL | 9533 | MEHLVILLE | MO | |
| 314-488 | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | KIRKWOOD | MO | |
| 314-489 | SOUTHWESTERN BELL | 9533 | ST LOUIS | MO | |
| 314-490 | AMERICAN MESSAGING SERVICES, LLC | 9748 | LADUE | MO | |
| 314-491 | AMERICAN MESSAGING SERVICES, LLC | 9748 | LADUE | MO | |
| 314-492 | ONVOY, LLC - MO | 093F | ST LOUIS | MO | |
| 314-493 | SOUTHWESTERN BELL | 9533 | LADUE | MO | |
| 314-494 | T-MOBILE USA, INC. | 6529 | LADUE | MO | |
| 314-495 | T-MOBILE USA, INC. | 6529 | LADUE | MO | |
| 314-496 | T-MOBILE USA, INC. | 6529 | LADUE | MO | |
| 314-497 | T-MOBILE USA, INC. | 6529 | LADUE | MO | |
| 314-498 | T-MOBILE USA, INC. | 6529 | LADUE | MO | |
| 314-501 | PEERLESS NETWORK OF MISSOURI, LLC - MO | 225F | SAPPINGTON | MO | |
| 314-503 | T-MOBILE USA, INC. | 6529 | LADUE | MO | |
| 314-504 | T-MOBILE USA, INC. | 6529 | LADUE | MO | |
| 314-505 | SOUTHWESTERN BELL | 9533 | ST LOUIS | MO | |
| 314-506 | SOUTHWESTERN BELL | 9533 | LADUE | MO | |
| 314-507 | SPOK, INC. | 6630 | LADUE | MO | |
| 314-508 | AMERICAN MESSAGING SERVICES, LLC | 9748 | ST LOUIS | MO | |
| 314-509 | AMERICAN MESSAGING SERVICES, LLC | 9748 | ST LOUIS | MO | |
| 314-510 | AMERICAN MESSAGING SERVICES, LLC | 9748 | ST LOUIS | MO | |
| 314-511 | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | MO | |
| 314-512 | SOUTHWESTERN BELL | 9533 | ST LOUIS | MO | |
| 314-513 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO | 7432 | LADUE | MO | |
| 314-514 | SOUTHWESTERN BELL | 9533 | CREVECOEUR | MO | |
| 314-515 | SOUTHWESTERN BELL | 9533 | CREVECOEUR | MO | |
| 314-516 | SOUTHWESTERN BELL | 9533 | ST LOUIS | MO | |
| 314-517 | T-MOBILE USA, INC. | 6529 | LADUE | MO | |
| 314-518 | T-MOBILE USA, INC. | 6529 | LADUE | MO | |
| 314-520 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | KIRKWOOD | MO | |
| 314-521 | SOUTHWESTERN BELL | 9533 | LADUE | MO | |
| 314-522 | SOUTHWESTERN BELL | 9533 | LADUE | MO |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/18/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.