NumberResearchRecent 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.
Most active assignees, last 30 days
New assignments by month
Sep 2026
Aug 2026
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May 2026
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Mar 2026
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Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2017-03-07 | 431-256 | not yet reported which blocks → | Bell Mobility | 6574 | Fisher River | — |
| 2017-03-07 | 431-257 | not yet reported which blocks → | Bell Mobility | 6574 | Foxwarren | — |
| 2017-03-07 | 431-258 | not yet reported which blocks → | Bell Mobility | 6574 | Gillam | — |
| 2017-03-07 | 431-259 | not yet reported which blocks → | Bell Mobility | 6574 | Grand Rapids | — |
| 2017-03-07 | 431-260 | not yet reported which blocks → | Bell Mobility | 6574 | Grand Beach | — |
| 2017-03-07 | 431-261 | not yet reported which blocks → | Bell Mobility | 6574 | Hamiota | — |
| 2017-03-07 | 431-262 | not yet reported which blocks → | Bell Mobility | 6574 | Libau | — |
| 2017-03-07 | 431-263 | not yet reported which blocks → | Bell Mobility | 6574 | Churchill | — |
| 2017-03-07 | 431-264 | not yet reported which blocks → | Bell Mobility | 6574 | Cross Lake | — |
| 2017-03-07 | 431-265 | not yet reported which blocks → | Bell Mobility | 6574 | Easterville | — |
| 2017-03-07 | 431-266 | not yet reported which blocks → | Bell Mobility | 6574 | Killarney | — |
| 2017-03-07 | 431-267 | not yet reported which blocks → | Bell Mobility | 6574 | Oxford House | — |
| 2017-03-07 | 431-268 | not yet reported which blocks → | Bell Mobility | 6574 | Pilot Mound | — |
| 2017-03-07 | 431-269 | not yet reported which blocks → | Bell Mobility | 6574 | Pointe Du Bois | — |
| 2017-03-07 | 440-722 | 0–9 XXXall 10 · 3 holders which blocks → | TELNYX LLC | 073H | BRECKSVL | OH |
| 2017-03-07 | 440-929 | 0–9 XXXall 10 · 3 holders which blocks → | TELNYX LLC | 073H | BEREA | OH |
| 2017-03-07 | 845-413 | 0–9 XXXall 10 · 5 holders which blocks → | OMNIPOINT COMMUNICATIONS, INC. - NY | 6622 | CARMEL | NY |
| 2017-03-07 | 845-822 | 0–9 XXXall 10 · 8 holders which blocks → | TELNYX LLC | 073H | CORNWALL | NY |
| 2017-03-07 | 845-836 | 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → | TELNYX LLC | 073H | WAPIGRSFLS | NY |
| 2017-03-06 | 336-942 | 0–9 XXXall 10 · 3 holders which blocks → | METROPCS, INC. | 5562 | HIGH POINT | NC |
| 2017-03-06 | 364-888 | 0–9 XXXall 10 · 2 holders which blocks → | ONVOY, LLC - KY | 896E | BOWLNGGREN | KY |
| 2017-03-06 | 431-270 | not yet reported which blocks → | Bell Mobility | 6574 | Rivers | — |
| 2017-03-06 | 431-271 | not yet reported which blocks → | Bell Mobility | 6574 | Roblin | — |
| 2017-03-06 | 431-272 | not yet reported which blocks → | Bell Mobility | 6574 | Riverton | — |
| 2017-03-06 | 431-286 | not yet reported which blocks → | Bell Mobility | 6574 | Rossburn | — |
| 2017-03-06 | 431-287 | not yet reported which blocks → | Bell Mobility | 6574 | Sprague | — |
| 2017-03-06 | 431-288 | not yet reported which blocks → | Bell Mobility | 6574 | St. Theresa Point | — |
| 2017-03-06 | 431-289 | not yet reported which blocks → | Bell Mobility | 6574 | Ste. Rose du Lac | — |
| 2017-03-06 | 431-290 | not yet reported which blocks → | Bell Mobility | 6574 | Treherne | — |
| 2017-03-06 | 431-291 | not yet reported which blocks → | Bell Mobility | 6574 | Strathclair | — |
| 2017-03-06 | 431-292 | not yet reported which blocks → | Bell Mobility | 6574 | Woodlands | — |
| 2017-03-06 | 501-293 | 0–9 XXXall 10 · 4 holders which blocks → | T-MOBILE USA, INC. | 6529 | HOTSPRINGS | AR |
| 2017-03-06 | 506-495 | not yet reported which blocks → | Bragg Communications Inc. | 421G | Shediac | — |
| 2017-03-06 | 540-900 | 0–9 XXXwhole prefix which blocks → | ONVOY, LLC - VA | 138E | ROANOKE | VA |
| 2017-03-06 | 608-731 | 2XXX3XXX · 2 holders which blocks → | ONVOY, LLC - WI | 225C | WEST SALEM | WI |
| 2017-03-06 | 647-250 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Toronto | — |
| 2017-03-06 | 702-801 | 0–9 XXXwhole prefix which blocks → | METROPCS, INC. | 5562 | LAS VEGAS | NV |
| 2017-03-06 | 782-466 | not yet reported which blocks → | Bragg Communications Inc. | 4878 | Port Hood | — |
| 2017-03-06 | 808-818 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | TWC IP ENABLED SERVICES, LLC | 793K | LANAI CITY | HI |
| 2017-03-06 | 808-862 | 2XXX3XXX4XXX5XXX6XXX8XXX · 2 holders which blocks → | TWC IP ENABLED SERVICES, LLC | 793K | KAUNAKAKAI | HI |
| 2017-03-06 | 813-459 | 0–9 XXXwhole prefix which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL | 6502 | TAMPACEN | FL |
| 2017-03-06 | 828-405 | 0–9 XXXall 10 · 4 holders which blocks → | METROPCS, INC. | 5562 | HICKORY | NC |
| 2017-03-03 | 231-260 | 0–9 XXXall 10 · 3 holders which blocks → | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | MUSKEGON | MI |
| 2017-03-03 | 317-516 | 0–9 XXXall 10 · 4 holders which blocks → | COMCAST IP PHONE, LLC | 318J | FISHERS | IN |
| 2017-03-03 | 385-485 | 0–9 XXXall 10 · 5 holders which blocks → | WIDE VOICE, LLC - UT | 659H | MURRAY | UT |
| 2017-03-03 | 434-777 | 0–9 XXXall 10 · 4 holders which blocks → | TELNYX LLC | 073H | CHASE CITY | VA |
| 2017-03-03 | 434-888 | 0XXX1XXX4XXX6XXX8XXX9XXX · 5 holders which blocks → | TELNYX LLC | 073H | CHRLTTCTHS | VA |
| 2017-03-03 | 605-417 | 0–9 XXXwhole prefix which blocks → | NATIVE AMERICAN TELECOM, LLC - SD | 424F | FTTHOMPSON | SD |
| 2017-03-03 | 681-779 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - WV | 080F | RIVESVILLE | WV |
| 2017-03-03 | 769-252 | 0–9 XXXall 10 · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - MS | 992E | PELAHATCHI | MS |
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.