NumberResearchRecent prefix assignments
358 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
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2011-06-08 | 716-248 | 0–9 XXXall 10 · 5 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY | 6959 | BUFFALO | NY |
| 2011-06-08 | 778-264 | not yet reported which blocks → | Zayo Canada Inc. | 8304 | North Vancouver | — |
| 2011-06-08 | 818-976 | not yet reported which blocks → | NORTH COUNTY COMMUNICATION CORPORATION - CA | 7894 | VAN NUYS | CA |
| 2011-06-08 | 862-232 | 0–9 XXXall 10 · 3 holders which blocks → | OMNIPOINT COMMUNICATIONS, INC. - NJ | 6623 | PASSAIC | NJ |
| 2011-06-08 | 914-352 | 0–9 XXXall 10 · 6 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7650 | YORKTN HTS | NY |
| 2011-06-07 | 204-707 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | Virden | — |
| 2011-06-07 | 415-906 | 0–9 XXXall 10 · 3 holders which blocks → | BANDWIDTH.COM CLEC, LLC - CA | 981E | SNFC CNTRL | CA |
| 2011-06-07 | 450-453 | not yet reported which blocks → | Distributel | 083E | Pont-Viau | — |
| 2011-06-07 | 581-317 | not yet reported which blocks → | Distributel | 083E | Quebec | — |
| 2011-06-07 | 581-318 | not yet reported which blocks → | Distributel | 083E | Quebec | — |
| 2011-06-07 | 587-977 | not yet reported which blocks → | Distributel | 081E | Calgary | — |
| 2011-06-07 | 587-978 | not yet reported which blocks → | Distributel | 081E | Calgary | — |
| 2011-06-07 | 604-424 | not yet reported which blocks → | Distributel | 081E | Vancouver | — |
| 2011-06-07 | 613-778 | not yet reported which blocks → | Distributel | 082E | Ottawa-Hull | — |
| 2011-06-07 | 613-916 | not yet reported which blocks → | Distributel | 082E | Ottawa-Hull | — |
| 2011-06-07 | 613-917 | not yet reported which blocks → | Distributel | 082E | Ottawa-Hull | — |
| 2011-06-07 | 682-220 | 0–9 XXXall 10 · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | ARLINGTON | TX |
| 2011-06-06 | 352-282 | 0–9 XXXall 10 · 6 holders which blocks → | METROPCS, INC. | 5562 | OCALA | FL |
| 2011-06-06 | 609-342 | 0–9 XXXall 10 · 4 holders which blocks → | COMCAST IP PHONE, LLC | 318J | BEACHHAVEN | NJ |
| 2011-06-03 | 208-901 | 0–9 XXXall 10 · 5 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - ID | 678B | BOISE | ID |
| 2011-06-03 | 314-499 | 0–9 XXXall 10 · 4 holders which blocks → | BANDWIDTH.COM CLEC, LLC - MO | 993E | ST LOUIS | MO |
| 2011-06-03 | 414-639 | 0–9 XXXall 10 · 3 holders which blocks → | T-MOBILE USA, INC. | 6529 | MILWAUKZN1 | WI |
| 2011-06-03 | 425-505 | 0–9 XXXall 10 · 5 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BELLEVUE | WA |
| 2011-06-03 | 438-317 | not yet reported which blocks → | Distributel | 083E | Montreal | — |
| 2011-06-03 | 438-318 | not yet reported which blocks → | Distributel | 083E | Montreal | — |
| 2011-06-03 | 438-319 | not yet reported which blocks → | Distributel | 083E | Montreal | — |
| 2011-06-03 | 502-908 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → | WINDSTREAM KENTUCKY WEST, INC. | 0402 | ZONETON | KY |
| 2011-06-03 | 606-492 | 0–9 XXXall 10 · 5 holders which blocks → | WINDSTREAM KENTUCKY EAST, INC. - LEXINGTON | 9690 | SOMERSET | KY |
| 2011-06-03 | 631-527 | 0–9 XXXall 10 · 5 holders which blocks → | CSC VOICE, LLC | 612K | E HAMPTON | NY |
| 2011-06-03 | 647-732 | not yet reported which blocks → | Distributel | 082E | Toronto | — |
| 2011-06-03 | 647-733 | not yet reported which blocks → | Distributel | 082E | Toronto | — |
| 2011-06-03 | 647-734 | not yet reported which blocks → | Distributel | 082E | Toronto | — |
| 2011-06-03 | 647-735 | not yet reported which blocks → | Distributel | 082E | Toronto | — |
| 2011-06-03 | 647-736 | not yet reported which blocks → | Distributel | 082E | Toronto | — |
| 2011-06-03 | 734-589 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - MI | 991E | WAYNE | MI |
| 2011-06-03 | 850-296 | 0–9 XXXall 10 · 3 holders which blocks → | BANDWIDTH.COM CLEC, LLC - FL | 982E | TALLAHASSE | FL |
| 2011-06-03 | 915-230 | 0–9 XXXall 10 · 3 holders which blocks → | SOUTHWESTERN BELL | 9533 | EL PASO | TX |
| 2011-06-03 | 915-236 | 0–9 XXXall 10 · 3 holders which blocks → | SOUTHWESTERN BELL | 9533 | EL PASO | TX |
| 2011-06-02 | 479-237 | 0XXX1XXX2XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → | T-MOBILE USA, INC. | 6529 | RUSSELLVL | AR |
| 2011-06-02 | 480-395 | 0–9 XXXwhole prefix which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PHOENIX | AZ |
| 2011-06-02 | 501-243 | 0–9 XXXall 10 · 4 holders which blocks → | T-MOBILE USA, INC. | 6529 | LITTLEROCK | AR |
| 2011-06-02 | 513-370 | 0–9 XXXall 10 · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - OH | 4863 | CINCINNATI | OH |
| 2011-06-02 | 612-222 | 0–9 XXXall 10 · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | TWINCITIES | MN |
| 2011-06-02 | 615-854 | 0–9 XXXall 10 · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | NASHVILLE | TN |
| 2011-06-02 | 684-248 | not yet reported which blocks → | AST TELECOM, LLC | 1460 | AM SAMOA | AS |
| 2011-06-02 | 702-690 | 0–9 XXXall 10 · 5 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LAS VEGAS | NV |
| 2011-06-02 | 760-991 | 0–9 XXXall 10 · 6 holders which blocks → | PAETEC ITEL, LLC | 829J | VTVL ADLN | CA |
| 2011-06-02 | 774-294 | 0–9 XXXall 10 · 3 holders which blocks → | BANDWIDTH.COM CLEC, LLC - MA | 990E | FALL RIVER | MA |
| 2011-06-02 | 774-462 | 0–9 XXXall 10 · 7 holders which blocks → | BANDWIDTH.COM CLEC, LLC - MA | 990E | MILFORD | MA |
| 2011-06-02 | 865-221 | 0–9 XXXall 10 · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | KNOXVILLE | TN |
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.