NumberResearchRecent prefix assignments
341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026
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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Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2004-12-13 | 214-996 | 0–9 XXXwhole prefix which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | DALLAS | TX |
| 2004-12-13 | 240-394 | 0–9 XXXall 10 · 4 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | MOUNT AIRY | MD |
| 2004-12-13 | 512-727 | 0–9 XXXwhole prefix which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | AUSTIN | TX |
| 2004-12-13 | 540-244 | 0–9 XXXall 10 · 3 holders which blocks → | METROPCS, INC. | 5562 | LURAY | VA |
| 2004-12-13 | 636-393 | 0–9 XXXall 10 · 7 holders which blocks → | CHARTER IP ENABLED SERVICES, LLC | 792K | PACIFIC | MO |
| 2004-12-13 | 636-887 | 0–9 XXXall 10 · 4 holders which blocks → | CHARTER IP ENABLED SERVICES, LLC | 792K | WENTZVILLE | MO |
| 2004-12-13 | 713-583 | 0–9 XXXwhole prefix which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7074 | HOUSTON | TX |
| 2004-12-13 | 740-882 | 2XXX4XXX7XXX8XXX9XXX · 3 holders which blocks → | TWC IP ENABLED SERVICES, LLC | 793K | CUMBERLAND | OH |
| 2004-12-13 | 812-787 | 0XXX1XXX2XXX3XXX8XXX9XXX · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN | 6725 | MONTGOMERY | IN |
| 2004-12-13 | 817-603 | 0–9 XXXwhole prefix which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | FORT WORTH | TX |
| 2004-12-13 | 817-830 | 0–9 XXXwhole prefix which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | NRICHLDHLS | TX |
| 2004-12-13 | 817-977 | 0–9 XXXwhole prefix which blocks → | LEVEL 3 OF TELECOM OF TEXAS, LLC - TX | 7516 | ARLINGTON | TX |
| 2004-12-13 | 905-860 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Caledon East | — |
| 2004-12-13 | 905-916 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Clarkson | — |
| 2004-12-13 | 905-990 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Port Credit | — |
| 2004-12-13 | 905-996 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Snelgrove | — |
| 2004-12-13 | 905-998 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Victoria | — |
| 2004-12-13 | 909-522 | 0–9 XXXall 10 · 6 holders which blocks → | METROPCS NETWORKS, LLC | 899D | S BERNDINO | CA |
| 2004-12-13 | 985-218 | 0–9 XXXall 10 · 7 holders which blocks → | PAETEC ITEL, LLC | 829J | LACOMBE | LA |
| 2004-12-10 | 435-491 | 0XXX1XXX2XXX7XXX9XXX which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BICKNELL | UT |
| 2004-12-10 | 580-461 | 0–9 XXXwhole prefix which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK | 5813 | GUYMON | OK |
| 2004-12-10 | 905-503 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Aurora | — |
| 2004-12-10 | 905-533 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Bolton | — |
| 2004-12-10 | 905-534 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Gormley | — |
| 2004-12-10 | 905-535 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Keswick | — |
| 2004-12-10 | 905-539 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | King City | — |
| 2004-12-10 | 905-552 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Kleinburg | — |
| 2004-12-10 | 912-314 | 6XXX7XXX8XXX which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA | 6540 | METTER | GA |
| 2004-12-09 | 309-508 | not yet reported which blocks → | MTCO COMMUNICATIONS, INC. | 4837 | METAMORA | IL |
| 2004-12-09 | 320-434 | 0–9 XXXall 10 · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MN | 5256 | LITCHFIELD | MN |
| 2004-12-09 | 480-277 | 0–9 XXXall 10 · 2 holders which blocks → | T-MOBILE USA, INC. | 6529 | PHOENIX | AZ |
| 2004-12-09 | 859-218 | not yet reported which blocks → | WINDSTREAM KENTUCKY EAST, INC. - LEXINGTON | 9690 | LEXINGTON | KY |
| 2004-12-09 | 905-583 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Palgrave | — |
| 2004-12-09 | 905-589 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Queensville | — |
| 2004-12-09 | 905-590 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Schomberg | — |
| 2004-12-09 | 905-591 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Stouffville | — |
| 2004-12-09 | 905-597 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Thornhill | — |
| 2004-12-09 | 905-604 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Unionville | — |
| 2004-12-09 | 905-605 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Woodbridge | — |
| 2004-12-08 | 229-486 | not yet reported which blocks → | MCC TELEPHONY LLC | 593K | VIENNA | GA |
| 2004-12-08 | 304-515 | not yet reported which blocks → | FIBERNET, LLC - WV | 4095 | ROMNEY | WV |
| 2004-12-08 | 503-367 | 0–9 XXXall 10 · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PORTLAND | OR |
| 2004-12-08 | 715-941 | 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - WI | 5489 | ELLSWORTH | WI |
| 2004-12-08 | 905-553 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Maple | — |
| 2004-12-08 | 905-554 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Markham | — |
| 2004-12-08 | 905-557 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Mount Albert | — |
| 2004-12-08 | 905-558 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Nobleton | — |
| 2004-12-08 | 905-596 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Sutton | — |
| 2004-12-07 | 636-707 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MO | 4932 | CEDAR HILL | MO |
| 2004-12-07 | 772-634 | 0–9 XXXwhole prefix which blocks → | METROPCS, INC. | 5562 | STUART | FL |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.