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 |
|---|---|---|---|---|---|
| 314-320 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ST LOUIS | MO | |
| 314-321 | SOUTHWESTERN BELL | 9533 | ST LOUIS | MO | |
| 314-322 | T-MOBILE USA, INC. | 6529 | LADUE | MO | |
| 314-323 | T-MOBILE USA, INC. | 6529 | LADUE | MO | |
| 314-324 | T-MOBILE USA, INC. | 6529 | LADUE | MO | |
| 314-329 | ONVOY, LLC - MO | 093F | MEHLVILLE | MO | |
| 314-330 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO | 5814 | LADUE | MO | |
| 314-331 | SOUTHWESTERN BELL | 9533 | ST LOUIS | MO | |
| 314-333 | ONVOY, LLC - MO | 093F | ST LOUIS | MO | |
| 314-334 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO | 7432 | OAKVILLE | MO | |
| 314-335 | SOUTHWESTERN BELL | 9533 | ST LOUIS | MO | |
| 314-336 | PAETEC ITEL, LLC | 829J | CREVECOEUR | MO | |
| 314-340 | SOUTHWESTERN BELL | 9533 | ST LOUIS | MO | |
| 314-341 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO | 5814 | LADUE | MO | |
| 314-342 | SOUTHWESTERN BELL | 9533 | ST LOUIS | MO | |
| 314-344 | SOUTHWESTERN BELL | 9533 | LADUE | MO | |
| 314-345 | SOUTHWESTERN BELL | 9533 | ST LOUIS | MO | |
| 314-346 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO | 5814 | LADUE | MO | |
| 314-348 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO | 5814 | LADUE | MO | |
| 314-351 | SOUTHWESTERN BELL | 9533 | ST LOUIS | MO | |
| 314-352 | SOUTHWESTERN BELL | 9533 | ST LOUIS | MO | |
| 314-353 | SOUTHWESTERN BELL | 9533 | ST LOUIS | MO | |
| 314-355 | SOUTHWESTERN BELL | 9533 | LADUE | MO | |
| 314-359 | T-MOBILE USA, INC. | 6529 | LADUE | MO | |
| 314-360 | AMERICAN MESSAGING SERVICES, LLC | 9748 | LADUE | MO | |
| 314-361 | SOUTHWESTERN BELL | 9533 | ST LOUIS | MO | |
| 314-362 | SOUTHWESTERN BELL | 9533 | ST LOUIS | MO | |
| 314-363 | T-MOBILE USA, INC. | 6529 | LADUE | MO | |
| 314-364 | SOUTHWESTERN BELL | 9533 | SAPPINGTON | MO | |
| 314-365 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO | 5814 | LADUE | MO | |
| 314-367 | SOUTHWESTERN BELL | 9533 | ST LOUIS | MO | |
| 314-368 | T-MOBILE USA, INC. | 6529 | LADUE | MO | |
| 314-369 | T-MOBILE USA, INC. | 6529 | LADUE | MO | |
| 314-371 | SOUTHWESTERN BELL | 9533 | ST LOUIS | MO | |
| 314-372 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO | 7432 | LADUE | MO | |
| 314-373 | PAETEC ITEL, LLC | 829J | LADUE | MO | |
| 314-374 | T-MOBILE USA, INC. | 6529 | LADUE | MO | |
| 314-375 | PAETEC ITEL, LLC | 829J | OAKVILLE | MO | |
| 314-377 | ONVOY, LLC - MO | 093F | LADUE | MO | |
| 314-378 | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LADUE | MO | |
| 314-380 | ONVOY, LLC - MO | 093F | OAKVILLE | MO | |
| 314-381 | SOUTHWESTERN BELL | 9533 | ST LOUIS | MO | |
| 314-382 | SOUTHWESTERN BELL | 9533 | ST LOUIS | MO | |
| 314-383 | SOUTHWESTERN BELL | 9533 | ST LOUIS | MO | |
| 314-385 | SOUTHWESTERN BELL | 9533 | ST LOUIS | MO | |
| 314-387 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO | 7432 | LADUE | MO | |
| 314-388 | SOUTHWESTERN BELL | 9533 | LADUE | MO | |
| 314-389 | SOUTHWESTERN BELL | 9533 | ST LOUIS | MO | |
| 314-391 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO | 5814 | ST LOUIS | MO | |
| 314-392 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO | 7432 | CREVECOEUR | 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.