NumberResearchRecent prefix assignments
357 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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Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2022-12-06 | 840-224 | 0–9 XXXall 10 · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | S BERNDINO | CA |
| 2022-12-06 | 858-343 | 0–9 XXXwhole prefix which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LA JOLLA | CA |
| 2022-12-06 | 873-308 | not yet reported which blocks → | Bell Mobility | 6574 | Trois-Rivieres | — |
| 2022-12-06 | 920-760 | 0–9 XXXall 10 · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - WI | 5489 | APPLETON | WI |
| 2022-12-06 | 943-473 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY, LLC - GA | 067D | GAINESVL | GA |
| 2022-12-06 | 949-730 | 0–9 XXXall 10 · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LAGUNA BCH | CA |
| 2022-12-06 | 959-240 | 0–9 XXXall 10 · 3 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - CT | 7143 | HARTFORD | CT |
| 2022-12-05 | 231-415 | 1XXX which blocks → | CHARTER IP ENABLED SERVICES, LLC | 792K | DUBLIN | MI |
| 2022-12-05 | 330-586 | 0–9 XXXwhole prefix which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MANTUA | OH |
| 2022-12-05 | 343-512 | not yet reported which blocks → | Iristel Inc. | 154E | Hawkesbury | — |
| 2022-12-05 | 365-761 | not yet reported which blocks → | Iristel Inc. | 154E | Dunnville | — |
| 2022-12-05 | 365-797 | not yet reported which blocks → | Iristel Inc. | 154E | Grimsby | — |
| 2022-12-05 | 474-470 | not yet reported which blocks → | Fibernetics Corporation | 464D | Davidson | — |
| 2022-12-05 | 474-471 | not yet reported which blocks → | Fibernetics Corporation | 464D | Grenfell | — |
| 2022-12-05 | 474-472 | not yet reported which blocks → | Fibernetics Corporation | 464D | Kipling | — |
| 2022-12-05 | 474-473 | not yet reported which blocks → | Fibernetics Corporation | 464D | Milestone | — |
| 2022-12-05 | 474-475 | not yet reported which blocks → | Fibernetics Corporation | 464D | Southey | — |
| 2022-12-05 | 474-476 | not yet reported which blocks → | Fibernetics Corporation | 464D | Whitewood | — |
| 2022-12-05 | 474-479 | not yet reported which blocks → | Fibernetics Corporation | 464D | Wolseley | — |
| 2022-12-05 | 579-526 | not yet reported which blocks → | Bell Canada | 984C | Contrecoeur | — |
| 2022-12-05 | 582-228 | 0–9 XXXall 10 · 3 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | ERIE | PA |
| 2022-12-05 | 873-747 | not yet reported which blocks → | Bell Canada | 984C | Campbell's Bay | — |
| 2022-12-05 | 919-503 | 0–9 XXXall 10 · 3 holders which blocks → | SUNCOM DBA T-MOBILE USA | 8645 | PITTSBORO | NC |
| 2022-12-05 | 947-260 | 0–9 XXXall 10 · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | BIRMINGHAM | MI |
| 2022-12-02 | 252-273 | 0–9 XXXall 10 · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC | 6324 | MOYOCK | NC |
| 2022-12-02 | 404-726 | 0–9 XXXwhole prefix which blocks → | ONVOY, LLC - GA | 067D | ATLANTA | GA |
| 2022-12-02 | 480-520 | 0–9 XXXwhole prefix which blocks → | ONVOY, LLC - AZ | 630E | PHOENIX | AZ |
| 2022-12-02 | 848-342 | 0–9 XXXall 10 · 4 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ | 6391 | FREEHOLD | NJ |
| 2022-12-01 | 240-973 | 0–9 XXXall 10 · 4 holders which blocks → | METROPCS, INC. | 5562 | WSNGTNZN12 | MD |
| 2022-12-01 | 249-541 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Emsdale | — |
| 2022-12-01 | 249-542 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Mactier | — |
| 2022-12-01 | 249-543 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Port Carling | — |
| 2022-12-01 | 256-986 | 0–9 XXXall 10 · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | DECATUR | AL |
| 2022-12-01 | 269-394 | 0–9 XXXall 10 · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | BATTLE CRK | MI |
| 2022-12-01 | 276-289 | 0–9 XXXall 10 · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | ABINGDON | VA |
| 2022-12-01 | 334-856 | 0–9 XXXwhole prefix which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | DOTHAN | AL |
| 2022-12-01 | 343-796 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Inverary | — |
| 2022-12-01 | 343-797 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Tweed | — |
| 2022-12-01 | 343-798 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Pakenham | — |
| 2022-12-01 | 346-608 | 0–9 XXXall 10 · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | KATY | TX |
| 2022-12-01 | 423-816 | 0–9 XXXwhole prefix which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | BRISTOL | TN |
| 2022-12-01 | 424-483 | 0–9 XXXall 10 · 3 holders which blocks → | T-MOBILE USA, INC. | 6529 | W ANGELES | CA |
| 2022-12-01 | 430-309 | 1XXX which blocks → | TWC IP ENABLED SERVICES, LLC | 793K | CYPRESSSPG | TX |
| 2022-12-01 | 445-279 | 0–9 XXXall 10 · 4 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | PHPHSBZN43 | PA |
| 2022-12-01 | 458-451 | 4XXX5XXX8XXX · 2 holders which blocks → | ONVOY, LLC - OR | 750E | BUTTEFALLS | OR |
| 2022-12-01 | 507-901 | 0–9 XXXall 10 · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN | 5816 | MANKATO | MN |
| 2022-12-01 | 534-207 | 9XXX which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | FOX CREEK | WI |
| 2022-12-01 | 567-592 | 3XXX which blocks → | FARMERS MUTUAL TELEPHONE CO. DBA FMTC | 760J | NAPOLEON | OH |
| 2022-12-01 | 579-733 | not yet reported which blocks → | TELUS Quebec | 2243 | St-Alphonse-de-Rodriguez | — |
| 2022-12-01 | 579-734 | not yet reported which blocks → | TELUS Quebec | 2243 | St-Eustache | — |
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.