Recent prefix assignments
375 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/30/2026
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 |
|---|---|---|---|---|---|---|
| — | 580-401 | 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 |
| — | 580-436 | not yet reported which blocks → | SOUTHWESTERN BELL | 9533 | ADA | OK |
| — | 580-437 | not yet reported which blocks → | TERRAL TEL. CO. | 2029 | TERRAL | OK |
| — | 580-438 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | CLEO SPG | OK |
| — | 580-439 | none assigned yet which blocks → | PIONEER TEL. COOP., INC. | 2018 | COMANCHE | OK |
| — | 580-440 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → | VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW | 1165 | KAW CITY | OK |
| — | 580-441 | 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | WINDSTREAM OKLAHOMA, INC. | 1965 | ELMORECITY | OK |
| — | 580-442 | not yet reported which blocks → | SOUTHWESTERN BELL | 9533 | LAWTON | OK |
| — | 580-443 | not yet reported which blocks → | WINDSTREAM OKLAHOMA, INC. | 1965 | MILBURN | OK |
| — | 580-444 | not yet reported which blocks → | WINDSTREAM OKLAHOMA, INC. | 1965 | VELMA | OK |
| — | 580-445 | 2XXX which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CLINTON | OK |
| — | 580-446 | 2XXX3XXX6XXX9XXX · 3 holders which blocks → | SOUTHWESTERN BELL | 9533 | BRECKENRDG | OK |
| — | 580-448 | 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | SOUTHWESTERN BELL | 9533 | SARKNSASCY | OK |
| — | 580-449 | 0XXX9XXX which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK | 5813 | CHEYENNE | OK |
| — | 580-450 | 3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK | 5813 | WALTERS | OK |
| — | 580-455 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | ORLANDO | OK |
| — | 580-456 | 0XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → | SOUTHWESTERN BELL | 9533 | ROFF | OK |
| — | 580-458 | 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 2 holders which blocks → | SOUTHWESTERN BELL | 9533 | LAWTON | OK |
| — | 580-460 | not yet reported which blocks → | SOUTHWESTERN BELL | 9533 | LAWTON | OK |
| — | 580-463 | not yet reported which blocks → | PIONEER TEL. COOP., INC. | 2018 | ALINE | OK |
| — | 580-464 | 4XXX6XXX8XXX · 3 holders which blocks → | OKLAHOMA COMMUNICATION SYSTEM, INC. | 1984 | CYRIL | OK |
| — | 580-465 | none assigned yet which blocks → | UNITED STATES CELLULAR - OK | 6272 | ARDMORE | OK |
| — | 580-467 | 9XXX which blocks → | UNITED STATES CELLULAR - OK | 6272 | DUNCAN | OK |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.