NumberResearchRecent prefix assignments
338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/23/2026
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.
Most active assignees, last 30 days
New assignments by month
Sep 2026
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Dec 2025
Nov 2025
Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2022-04-26 | 626-878 | 0–9 XXXall 10 · 4 holders which blocks → | FRACTEL, LLC | 965H | MONROVIA | CA |
| 2022-04-26 | 743-250 | 0–9 XXXall 10 · 4 holders which blocks → | METROPCS, INC. | 5562 | NOWILKESBO | NC |
| 2022-04-26 | 873-768 | not yet reported which blocks → | Fibernetics Corporation | 464D | Temiscaming | — |
| 2022-04-25 | 234-353 | 0XXX1XXX3XXX5XXX · 3 holders which blocks → | CSC VOICE, LLC | 612K | PARIS | OH |
| 2022-04-25 | 249-405 | not yet reported which blocks → | Fibernetics Corporation | 464D | Bonfield | — |
| 2022-04-25 | 249-406 | not yet reported which blocks → | Fibernetics Corporation | 464D | Callander | — |
| 2022-04-25 | 249-407 | not yet reported which blocks → | Fibernetics Corporation | 464D | Deux Rivieres | — |
| 2022-04-25 | 249-408 | not yet reported which blocks → | Fibernetics Corporation | 464D | Dokis | — |
| 2022-04-25 | 505-518 | 0–9 XXXall 10 · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | ALBUQURQUE | NM |
| 2022-04-25 | 602-847 | 0–9 XXXall 10 · 3 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PHOENIX | AZ |
| 2022-04-25 | 657-581 | 0–9 XXXwhole prefix which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | ORANGE | CA |
| 2022-04-25 | 657-585 | 0–9 XXXall 10 · 2 holders which blocks → | T-MOBILE USA, INC. | 6529 | SANTA ANA | CA |
| 2022-04-25 | 661-653 | 0–9 XXXall 10 · 6 holders which blocks → | T-MOBILE USA, INC. | 6529 | DELANO | CA |
| 2022-04-25 | 719-412 | 0–9 XXXall 10 · 2 holders which blocks → | T-MOBILE USA, INC. | 6529 | COLORDOSPG | CO |
| 2022-04-25 | 754-285 | 0–9 XXXall 10 · 2 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - FL | 8300 | FTLAUDERDL | FL |
| 2022-04-25 | 801-247 | 0–9 XXXwhole prefix which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | OGDEN | UT |
| 2022-04-25 | 804-710 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → | METROPCS, INC. | 5562 | VARINA | VA |
| 2022-04-22 | 236-773 | not yet reported which blocks → | Iristel Inc. | 154E | Whistler | — |
| 2022-04-22 | 236-835 | not yet reported which blocks → | Iristel Inc. | 154E | Salmon Arm | — |
| 2022-04-22 | 404-208 | 0–9 XXXall 10 · 2 holders which blocks → | ONVOY SPECTRUM, LLC | 624H | ATLANTA | GA |
| 2022-04-22 | 478-243 | 1XXX4XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - GA | 6116 | DAVISBORO | GA |
| 2022-04-22 | 480-856 | 0–9 XXXall 10 · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - AZ | 3285 | PHOENIX | AZ |
| 2022-04-22 | 480-876 | 0–9 XXXwhole prefix which blocks → | T-MOBILE USA, INC. | 6529 | PHOENIX | AZ |
| 2022-04-22 | 582-212 | 0XXX1XXX2XXX3XXX6XXX7XXX8XXX · 6 holders which blocks → | BANDWIDTH.COM CLEC, LLC - PA | 002F | SPRING ML | PA |
| 2022-04-22 | 602-894 | 0–9 XXXwhole prefix which blocks → | ONVOY, LLC - AZ | 630E | PHOENIX | AZ |
| 2022-04-22 | 615-317 | not yet reported which blocks → | AMERICAN MESSAGING SERVICES, LLC | 9748 | NASHVILLE | TN |
| 2022-04-22 | 623-276 | 0–9 XXXall 10 · 2 holders which blocks → | T-MOBILE USA, INC. | 6529 | PHOENIX | AZ |
| 2022-04-22 | 682-380 | 0–9 XXXall 10 · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | ARLINGTON | TX |
| 2022-04-22 | 859-364 | 0XXX1XXX8XXX9XXX · 3 holders which blocks → | TWC IP ENABLED SERVICES, LLC | 793K | PAINT LICK | KY |
| 2022-04-22 | 864-796 | 0–9 XXXall 10 · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | LAURENS | SC |
| 2022-04-21 | 386-332 | 0–9 XXXwhole prefix which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | FLAGLERBCH | FL |
| 2022-04-21 | 423-222 | 0–9 XXXwhole prefix which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PIKEVILLE | TN |
| 2022-04-21 | 585-619 | 0–9 XXXall 10 · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | WELLSVILLE | NY |
| 2022-04-21 | 603-633 | 0–9 XXXall 10 · 4 holders which blocks → | BELL ATLANTIC MOBILE, INC | 6386 | MILFORD | NH |
| 2022-04-21 | 603-857 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → | LEAP TELECOM, LLC | 616J | SUNCOOK | NH |
| 2022-04-21 | 702-661 | 0–9 XXXall 10 · 3 holders which blocks → | T-MOBILE USA, INC. | 6529 | LAS VEGAS | NV |
| 2022-04-21 | 782-412 | not yet reported which blocks → | Bell Mobility Aliant | 329A | Halifax | — |
| 2022-04-21 | 904-836 | 0–9 XXXall 10 · 7 holders which blocks → | METROPCS NETWORKS, LLC | 899D | STARKE | FL |
| 2022-04-21 | 934-230 | 0–9 XXXall 10 · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | RIVERHEAD | NY |
| 2022-04-20 | 343-505 | not yet reported which blocks → | Iristel Inc. | 154E | Kingston | — |
| 2022-04-20 | 548-901 | not yet reported which blocks → | Iristel Inc. | 154E | Brantford | — |
| 2022-04-20 | 612-409 | 0–9 XXXall 10 · 4 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN | 5816 | TWINCITIES | MN |
| 2022-04-20 | 672-760 | not yet reported which blocks → | Iristel Inc. | 154E | Princeton | — |
| 2022-04-20 | 807-798 | not yet reported which blocks → | Iristel Inc. | 154E | Fort Frances | — |
| 2022-04-20 | 826-500 | 0XXX5XXX which blocks → | FRACTEL, LLC | 965H | SHENANDOAH | VA |
| 2022-04-20 | 843-220 | 0XXX1XXX2XXX4XXX8XXX9XXX · 3 holders which blocks → | SUNCOM DBA T-MOBILE USA | 8645 | EASTCONWAY | SC |
| 2022-04-19 | 225-285 | 0–9 XXXall 10 · 3 holders which blocks → | COMMIO, LLC | 939H | BATONROUGE | LA |
| 2022-04-19 | 236-202 | not yet reported which blocks → | Zayo Canada Inc. | 8304 | Vancouver | — |
| 2022-04-19 | 236-232 | not yet reported which blocks → | Iristel Inc. | 154E | Abbotsford | — |
| 2022-04-19 | 318-860 | 0–9 XXXall 10 · 4 holders which blocks → | COMMIO, LLC | 939H | SHREVEPORT | LA |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.