NumberResearchRecent prefix assignments
349 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/24/2026
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
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Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2022-08-16 | 667-412 | 0XXX1XXX9XXX · 3 holders which blocks → | NUSO, LLC | 732J | EASTON | MD |
| 2022-08-16 | 667-413 | 0–9 XXXall 10 · 3 holders which blocks → | NUSO, LLC | 732J | ARGRGBSNIS | MD |
| 2022-08-16 | 708-413 | 0–9 XXXall 10 · 2 holders which blocks → | BANDWIDTH.COM CLEC, LLC - IL | 984E | CICERO | IL |
| 2022-08-16 | 725-279 | 0–9 XXXall 10 · 4 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LAS VEGAS | NV |
| 2022-08-16 | 727-604 | 0–9 XXXall 10 · 2 holders which blocks → | ONVOY SPECTRUM, LLC | 624H | CLEARWATER | FL |
| 2022-08-16 | 737-330 | 0–9 XXXall 10 · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | AUSTIN | TX |
| 2022-08-16 | 743-252 | 0–9 XXXwhole prefix which blocks → | LEVEL 3 COMMUNICATIONS, LLC - NC | 3235 | WINSTN SAL | NC |
| 2022-08-16 | 825-460 | not yet reported which blocks → | Iristel Inc. | 154E | Lac La Biche | — |
| 2022-08-16 | 825-873 | not yet reported which blocks → | Iristel Inc. | 154E | Jasper | — |
| 2022-08-16 | 825-895 | not yet reported which blocks → | Iristel Inc. | 154E | Oyen | — |
| 2022-08-16 | 825-968 | not yet reported which blocks → | TELUS Mobility | 8301 | Hanna | — |
| 2022-08-16 | 825-969 | not yet reported which blocks → | TELUS Mobility | 8301 | Canmore | — |
| 2022-08-16 | 901-670 | 0–9 XXXwhole prefix which blocks → | ONVOY SPECTRUM, LLC | 624H | MEMPHIS | TN |
| 2022-08-16 | 914-546 | 0–9 XXXall 10 · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - NY | 997E | WSCHSTZN03 | NY |
| 2022-08-15 | 424-482 | 0–9 XXXall 10 · 4 holders which blocks → | T-MOBILE USA, INC. | 6529 | SAN PEDRO | CA |
| 2022-08-15 | 825-557 | not yet reported which blocks → | Iristel Inc. | 154E | High Level | — |
| 2022-08-15 | 825-864 | not yet reported which blocks → | Iristel Inc. | 154E | Fort McMurray | — |
| 2022-08-15 | 825-908 | not yet reported which blocks → | Iristel Inc. | 154E | Langdon | — |
| 2022-08-15 | 825-916 | not yet reported which blocks → | Iristel Inc. | 154E | Coaldale | — |
| 2022-08-12 | 231-410 | 0XXX1XXX2XXX4XXX7XXX8XXX9XXX · 6 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MANISTEE | MI |
| 2022-08-12 | 253-308 | 0–9 XXXall 10 · 3 holders which blocks → | T-MOBILE USA, INC. | 6529 | AUBURN | WA |
| 2022-08-12 | 256-969 | 0–9 XXXall 10 · 2 holders which blocks → | HD CARRIER LLC | 321J | HUNTSVILLE | AL |
| 2022-08-12 | 272-294 | 1XXX2XXX3XXX9XXX · 4 holders which blocks → | BOOST SUBSCRIBERCO L.L.C. | 490J | AVIS | PA |
| 2022-08-12 | 279-226 | 0–9 XXXall 10 · 3 holders which blocks → | T-MOBILE USA, INC. | 6529 | RSVL MAIN | CA |
| 2022-08-12 | 331-289 | 0–9 XXXall 10 · 5 holders which blocks → | T-MOBILE USA, INC. | 6529 | HINSDALE | IL |
| 2022-08-12 | 346-579 | 0–9 XXXall 10 · 3 holders which blocks → | AERIAL COMMUNICATIONS, INC. | 6701 | DICKINSON | TX |
| 2022-08-12 | 365-466 | not yet reported which blocks → | Fibernetics Corporation | 464D | Cayuga | — |
| 2022-08-12 | 365-467 | not yet reported which blocks → | Fibernetics Corporation | 464D | Dunnville | — |
| 2022-08-12 | 365-468 | not yet reported which blocks → | Fibernetics Corporation | 464D | Fisherville | — |
| 2022-08-12 | 365-469 | not yet reported which blocks → | Fibernetics Corporation | 464D | Port Robinson | — |
| 2022-08-12 | 365-470 | not yet reported which blocks → | Fibernetics Corporation | 464D | Ridgeway | — |
| 2022-08-12 | 365-471 | not yet reported which blocks → | Fibernetics Corporation | 464D | Selkirk | — |
| 2022-08-12 | 365-472 | not yet reported which blocks → | Fibernetics Corporation | 464D | Stevensville | — |
| 2022-08-12 | 365-473 | not yet reported which blocks → | Fibernetics Corporation | 464D | Wainfleet | — |
| 2022-08-12 | 365-474 | not yet reported which blocks → | Fibernetics Corporation | 464D | Wellandport | — |
| 2022-08-12 | 417-301 | 0XXX1XXX9XXX · 2 holders which blocks → | BOOST SUBSCRIBERCO L.L.C. | 490J | ANDERSON | MO |
| 2022-08-12 | 417-375 | 0XXX9XXX · 2 holders which blocks → | BOOST SUBSCRIBERCO L.L.C. | 490J | NOEL | MO |
| 2022-08-12 | 424-470 | 0–9 XXXwhole prefix which blocks → | T-MOBILE USA, INC. | 6529 | BEVERLYHLS | CA |
| 2022-08-12 | 475-314 | 0–9 XXXall 10 · 6 holders which blocks → | HD CARRIER LLC | 321J | HUNTINGTON | CT |
| 2022-08-12 | 557-500 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY SPECTRUM, LLC | 624H | ST LOUIS | MO |
| 2022-08-12 | 571-563 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY SPECTRUM, LLC | 624H | HERNDON | VA |
| 2022-08-12 | 573-806 | 0–9 XXXwhole prefix which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | BIRCH TREE | MO |
| 2022-08-12 | 582-217 | 6XXX7XXX9XXX · 3 holders which blocks → | BOOST SUBSCRIBERCO L.L.C. | 490J | MEYERSDALE | PA |
| 2022-08-12 | 582-218 | 0XXX1XXX9XXX · 2 holders which blocks → | BOOST SUBSCRIBERCO L.L.C. | 490J | TYRONE | PA |
| 2022-08-12 | 626-640 | 0–9 XXXall 10 · 4 holders which blocks → | T-MOBILE USA, INC. | 6529 | LA PUENTE | CA |
| 2022-08-12 | 657-615 | 0–9 XXXall 10 · 2 holders which blocks → | T-MOBILE USA, INC. | 6529 | ANAHEIM | CA |
| 2022-08-12 | 680-244 | 0–9 XXXall 10 · 5 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | SYRACUSE | NY |
| 2022-08-12 | 682-387 | 0–9 XXXwhole prefix which blocks → | T-MOBILE USA, INC. | 6529 | GRANBURY | TX |
| 2022-08-12 | 682-389 | 0–9 XXXwhole prefix which blocks → | T-MOBILE USA, INC. | 6529 | GRANBURY | TX |
| 2022-08-12 | 719-670 | 0–9 XXXall 10 · 6 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | 6567 | ALAMOSA | CO |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/24/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.