Recent prefix assignments
347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026
The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| — | 580-364 | 5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | SOUTHWESTERN BELL | 9533 | ATOKA | OK |
| — | 580-365 | not yet reported which blocks → | WINDSTREAM OKLAHOMA, INC. | 1965 | STERLING | OK |
| — | 580-367 | 3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | SOUTHWESTERN BELL | 9533 | CADDO | OK |
| — | 580-369 | 4XXX which blocks → | SOUTHWESTERN BELL | 9533 | DAVIS | OK |
| — | 580-370 | 6XXX7XXX8XXX9XXX · 3 holders which blocks → | METROPCS, INC. | 5562 | PERRY | OK |
| — | 580-371 | 7XXX8XXX which blocks → | SOUTHWESTERN BELL | 9533 | TISHOMINGO | OK |
| — | 580-374 | 0–9 XXXall 10 · 5 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK | 5813 | ELK CITY | OK |
| — | 580-375 | 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | T-MOBILE USA, INC. | 6529 | WEATHERFD | OK |
| — | 580-379 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → | SOUTHWESTERN BELL | 9533 | ALTUS | OK |
| — | 580-382 | 0–9 XXXall 10 · 7 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OK | 7258 | PONCA CITY | OK |
| — | 580-383 | 0XXX1XXX2XXX4XXX7XXX8XXX9XXX · 3 holders which blocks → | TELNYX LLC | 073H | CLINTON | OK |
| — | 580-384 | not yet reported which blocks → | WINDSTREAM OKLAHOMA, INC. | 1965 | MILL CREEK | OK |
| — | 580-385 | not yet reported which blocks → | KANOKLA TEL ASSN | 1788 | BRAMAN | OK |
| — | 580-386 | 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | ONVOY, LLC - OK | 409F | DAVIS | OK |
| — | 580-388 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | LAMONT | OK |
| — | 580-389 | not yet reported which blocks → | CHICKASAW TEL. CO. | 1980 | ARDMRAIRPK | OK |
| — | 580-393 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | SENTINEL | OK |
| — | 580-394 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 4 holders which blocks → | ONVOY, LLC - OK | 409F | GLENCOE | OK |
| — | 580-395 | 0XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → | SOUTHWESTERN BELL | 9533 | MEDFORD | OK |
| — | 580-396 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → | ONVOY, LLC - OK | 409F | MORRISON | OK |
| — | 580-397 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | MANITOU | OK |
| — | 580-398 | not yet reported which blocks → | SPOK, INC. | 6630 | ELK CITY | OK |
| — | 580-401 | 1XXX2XXX4XXX6XXX7XXX · 4 holders which blocks → | T-MOBILE USA, INC. | 6529 | PONCA CITY | OK |
| — | 580-402 | 8XXX which blocks → | T-MOBILE USA, INC. | 6529 | ENID | OK |
| — | 580-403 | 0–9 XXXall 10 · 6 holders which blocks → | ONVOY, LLC - OK | 409F | STRATFORD | OK |
| — | 580-405 | 0–9 XXXall 10 · 5 holders which blocks → | ONVOY, LLC - OK | 409F | ALLEN | OK |
| — | 580-406 | 0–9 XXXall 10 · 6 holders which blocks → | ONVOY, LLC - OK | 409F | HUGO | OK |
| — | 580-407 | 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | ONVOY, LLC - OK | 409F | IDABEL | OK |
| — | 580-408 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → | ONVOY, LLC - OK | 409F | RATTAN | OK |
| — | 580-409 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 5 holders which blocks → | ONVOY, LLC - OK | 409F | TUPELO | OK |
| — | 580-410 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 5 holders which blocks → | ONVOY, LLC - OK | 409F | WAPANUCKA | OK |
| — | 580-411 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | OK |
| — | 580-412 | 0XXX1XXX2XXX4XXX7XXX8XXX · 6 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA OK - LLC | 530C | FAIRVIEW | OK |
| — | 580-413 | 0XXX1XXX2XXX3XXX4XXX7XXX8XXX · 3 holders which blocks → | ONVOY, LLC - OK | 409F | RED ROCK | OK |
| — | 580-416 | 2XXX3XXX4XXX6XXX · 3 holders which blocks → | ONVOY, LLC - OK | 409F | MORRISON | OK |
| — | 580-417 | 0XXX3XXX4XXX5XXX8XXX9XXX · 3 holders which blocks → | AT&T ENTERPRISES, LLC | 516C | FAIRMONT | OK |
| — | 580-418 | 1XXX3XXX7XXX8XXX · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK | 5813 | FREDERICK | OK |
| — | 580-420 | not yet reported which blocks → | PINE TEL. CO. | 2017 | OAK HILL | OK |
| — | 580-421 | none assigned yet which blocks → | SOUTHWESTERN BELL | 9533 | ADA | OK |
| — | 580-422 | 0–9 XXXall 10 · 5 holders which blocks → | ONVOY, LLC - OK | 409F | BILLINGS | OK |
| — | 580-423 | not yet reported which blocks → | PANHANDLE TELEPHONE COOPERATIVE, INC. | 2016 | TEXHOMA | OK |
| — | 580-426 | not yet reported which blocks → | PANHANDLE TELEPHONE COOPERATIVE, INC. | 2016 | FELTWHLESS | OK |
| — | 580-427 | not yet reported which blocks → | ONVOY, LLC - OK | 409F | ADA | OK |
| — | 580-428 | not yet reported which blocks → | WINDSTREAM OKLAHOMA, INC. | 1965 | CLARITA | OK |
| — | 580-429 | 4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → | SOUTHWESTERN BELL | 9533 | CACHE | OK |
| — | 580-430 | 0XXX which blocks → | SOUTHWESTERN BELL | 9533 | ALVA | OK |
| — | 580-431 | not yet reported which blocks → | SOUTH CENTRAL TEL ASSN INC | 1831 | BURLINGTON | OK |
| — | 580-432 | not yet reported which blocks → | WINDSTREAM OKLAHOMA, INC. | 1965 | ELMOREWEST | OK |
| — | 580-434 | not yet reported which blocks → | CHEROKEE TEL. CO. | 1979 | CALERA | OK |
| — | 580-435 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | HOPETON | OK |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.