NumberResearchRecent prefix assignments
354 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/22/2026
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 |
|---|---|---|---|---|---|---|
| 2022-10-05 | 548-442 | not yet reported which blocks → | Fibernetics Corporation | 464D | Hickson | — |
| 2022-10-05 | 548-443 | not yet reported which blocks → | Fibernetics Corporation | 464D | Ingersoll | — |
| 2022-10-05 | 548-445 | not yet reported which blocks → | Fibernetics Corporation | 464D | Innerkip | — |
| 2022-10-05 | 548-446 | not yet reported which blocks → | Fibernetics Corporation | 464D | Kintore | — |
| 2022-10-05 | 559-810 | 1XXX7XXX9XXX · 3 holders which blocks → | COMCAST PHONE OF CALIFORNIA, LLC | 394L | CARUTHERS | CA |
| 2022-10-05 | 720-991 | 0–9 XXXall 10 · 4 holders which blocks → | COMMIO, LLC | 939H | DECKERS | CO |
| 2022-10-05 | 945-271 | 0–9 XXXall 10 · 7 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TX | 004F | WAXAHACHIE | TX |
| 2022-10-04 | 228-203 | 0–9 XXXall 10 · 3 holders which blocks → | NUSO, LLC | 732J | GULFPORT | MS |
| 2022-10-04 | 229-476 | 0–9 XXXwhole prefix which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | CUTHBERT | GA |
| 2022-10-04 | 343-596 | not yet reported which blocks → | Bell Mobility | 6574 | Ottawa-Hull | — |
| 2022-10-04 | 346-595 | 0–9 XXXall 10 · 2 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TX | 004F | ARCOLA | TX |
| 2022-10-04 | 350-222 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → | TERRA NOVA TELECOM INC. | 145J | HUGHSON | CA |
| 2022-10-04 | 350-333 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → | TERRA NOVA TELECOM INC. | 145J | NEWMAN | CA |
| 2022-10-04 | 350-444 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | TERRA NOVA TELECOM INC. | 145J | SNELLING | CA |
| 2022-10-04 | 350-666 | 0XXX1XXX2XXX6XXX9XXX · 4 holders which blocks → | TERRA NOVA TELECOM INC. | 145J | SANANDREAS | CA |
| 2022-10-04 | 350-777 | 0–9 XXXall 10 · 7 holders which blocks → | TERRA NOVA TELECOM INC. | 145J | GALT | CA |
| 2022-10-04 | 350-888 | 0XXX1XXX2XXX6XXX9XXX · 5 holders which blocks → | TERRA NOVA TELECOM INC. | 145J | GROVELAND | CA |
| 2022-10-04 | 350-999 | 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 6 holders which blocks → | TERRA NOVA TELECOM INC. | 145J | GUSTINE | CA |
| 2022-10-04 | 351-232 | 0XXX1XXX2XXX8XXX9XXX · 2 holders which blocks → | ONVOY, LLC - MA | 892D | TYNGSBORO | MA |
| 2022-10-04 | 365-341 | not yet reported which blocks → | Bell Mobility | 6574 | Brampton | — |
| 2022-10-04 | 365-378 | not yet reported which blocks → | Bell Mobility | 6574 | Hamilton | — |
| 2022-10-04 | 365-524 | not yet reported which blocks → | Videotron Ltd. | 787G | St. Catharines-Thorold | — |
| 2022-10-04 | 417-560 | 0–9 XXXall 10 · 4 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO | 5814 | WEBB CITY | MO |
| 2022-10-04 | 430-308 | 1XXX which blocks → | TWC IP ENABLED SERVICES, LLC | 793K | YANTIS | TX |
| 2022-10-04 | 437-430 | not yet reported which blocks → | Videotron Ltd. | 787G | Toronto | — |
| 2022-10-04 | 445-266 | 0–9 XXXall 10 · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | QUAKERTOWN | PA |
| 2022-10-04 | 480-914 | 0–9 XXXwhole prefix which blocks → | ONVOY, LLC - AZ | 630E | PHOENIX | AZ |
| 2022-10-04 | 520-657 | 0–9 XXXall 10 · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - AZ | 587F | HAYDEN | AZ |
| 2022-10-04 | 548-384 | not yet reported which blocks → | Videotron Ltd. | 787G | Kitchener-Waterloo | — |
| 2022-10-04 | 548-398 | not yet reported which blocks → | Bell Mobility | 6574 | Kitchener-Waterloo | — |
| 2022-10-04 | 548-435 | not yet reported which blocks → | Fibernetics Corporation | 464D | Beachville | — |
| 2022-10-04 | 548-436 | not yet reported which blocks → | Fibernetics Corporation | 464D | Bright | — |
| 2022-10-04 | 562-581 | 0–9 XXXall 10 · 5 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LAKEWOOD | CA |
| 2022-10-04 | 571-582 | 0–9 XXXwhole prefix which blocks → | ONVOY, LLC - VA | 138E | LORTONMTRO | VA |
| 2022-10-04 | 572-206 | 0–9 XXXall 10 · 3 holders which blocks → | PAETEC ITEL, LLC | 829J | OKLA CITY | OK |
| 2022-10-04 | 602-898 | 0–9 XXXwhole prefix which blocks → | ONVOY, LLC - AZ | 630E | PHOENIX | AZ |
| 2022-10-04 | 623-352 | 0–9 XXXwhole prefix which blocks → | ONVOY, LLC - AZ | 630E | PHOENIX | AZ |
| 2022-10-04 | 651-677 | 0–9 XXXall 10 · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN | 5816 | HASTINGS | MN |
| 2022-10-04 | 657-619 | 0–9 XXXall 10 · 3 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7139 | ORANGE | CA |
| 2022-10-04 | 662-203 | 0XXX1XXX2XXX3XXX9XXX · 3 holders which blocks → | NUSO, LLC | 732J | IUKA | MS |
| 2022-10-04 | 681-452 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WV | 6394 | HEDGESVL | WV |
| 2022-10-04 | 771-216 | 0–9 XXXall 10 · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DC | 6402 | WSHNGTNZN1 | DC |
| 2022-10-04 | 816-816 | 0–9 XXXwhole prefix which blocks → | ONVOY, LLC - MO | 093F | KANSASCITY | MO |
| 2022-10-04 | 858-326 | 0–9 XXXall 10 · 3 holders which blocks → | BANDWIDTH.COM CLEC, LLC - CA | 981E | CHULAVISTA | CA |
| 2022-10-04 | 947-256 | 0–9 XXXwhole prefix which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MILFDWH LK | MI |
| 2022-10-04 | 959-249 | 0XXX1XXX2XXX3XXX4XXX9XXX · 4 holders which blocks → | BANDWIDTH.COM CLEC, LLC - CT | 199F | CANAAN | CT |
| 2022-10-03 | 212-718 | 0–9 XXXall 10 · 2 holders which blocks → | BANDWIDTH.COM CLEC, LLC - NY | 997E | NWYRCYZN01 | NY |
| 2022-10-03 | 212-917 | 0–9 XXXwhole prefix which blocks → | BANDWIDTH.COM CLEC, LLC - NY | 997E | NWYRCYZN01 | NY |
| 2022-10-03 | 220-238 | 0–9 XXXwhole prefix which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH | 6025 | PATASKALA | OH |
| 2022-10-03 | 224-490 | 0–9 XXXall 10 · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ARLIGTNHTS | IL |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.