NumberResearchRecent prefix assignments
334 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
Jul 2026
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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 |
|---|---|---|---|---|---|---|
| 2015-12-04 | 860-936 | 0–9 XXXall 10 · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 6388 | HARTFORD | CT |
| 2015-12-03 | 269-482 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 6 holders which blocks → | PEERLESS NETWORK OF MICHIGAN, LLC - MI | 933G | OTSEGO | MI |
| 2015-12-03 | 425-375 | 0–9 XXXall 10 · 6 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BOTHELL | WA |
| 2015-12-03 | 442-269 | 0–9 XXXall 10 · 5 holders which blocks → | CENTURYLINK COMMUNICATIONS, LLC | 508J | JOSHUATREE | CA |
| 2015-12-03 | 442-276 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → | ONVOY, LLC - CA | 649C | PINYON | CA |
| 2015-12-03 | 442-282 | 0–9 XXXall 10 · 4 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PALMDESERT | CA |
| 2015-12-03 | 518-760 | 0–9 XXXall 10 · 6 holders which blocks → | OMNIPOINT COMMUNICATIONS, INC. - NY | 6622 | GLENSFALLS | NY |
| 2015-12-03 | 867-677 | not yet reported which blocks → | Iristel Inc. | 154E | Yellowknife | — |
| 2015-12-03 | 867-679 | not yet reported which blocks → | Iristel Inc. | 154E | Yellowknife | — |
| 2015-12-03 | 867-680 | not yet reported which blocks → | Iristel Inc. | 154E | Yellowknife | — |
| 2015-12-03 | 867-681 | not yet reported which blocks → | Iristel Inc. | 154E | Yellowknife | — |
| 2015-12-03 | 867-682 | not yet reported which blocks → | Iristel Inc. | 154E | Yellowknife | — |
| 2015-12-03 | 909-377 | 0–9 XXXall 10 · 4 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | UPLAND | CA |
| 2015-12-03 | 909-497 | 0–9 XXXall 10 · 4 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CHINO | CA |
| 2015-12-03 | 916-559 | 0–9 XXXall 10 · 2 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | SCRM NORTH | CA |
| 2015-12-02 | 231-251 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → | PEERLESS NETWORK OF MICHIGAN, LLC - MI | 933G | LKLEELANAU | MI |
| 2015-12-02 | 231-447 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → | ONVOY, LLCV - MI | 543C | HOLTON | MI |
| 2015-12-02 | 306-705 | not yet reported which blocks → | SaskTel Mobility | 9868 | Melville | — |
| 2015-12-02 | 306-712 | not yet reported which blocks → | SaskTel Mobility | 9868 | Swift Current | — |
| 2015-12-02 | 306-804 | not yet reported which blocks → | SaskTel Mobility | 9868 | Fort Qu'Appelle | — |
| 2015-12-02 | 437-370 | not yet reported which blocks → | Iristel Inc. | 154E | Toronto | — |
| 2015-12-02 | 567-408 | 0–9 XXXall 10 · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | SYLVANIA | OH |
| 2015-12-02 | 867-467 | not yet reported which blocks → | Iristel Inc. | 154E | Whitehorse | — |
| 2015-12-02 | 867-469 | not yet reported which blocks → | Iristel Inc. | 154E | Whitehorse | — |
| 2015-12-02 | 867-470 | not yet reported which blocks → | Iristel Inc. | 154E | Whitehorse | — |
| 2015-12-02 | 867-471 | not yet reported which blocks → | Iristel Inc. | 154E | Whitehorse | — |
| 2015-12-01 | 208-508 | 0–9 XXXall 10 · 5 holders which blocks → | ONVOY, LLC - ID | 689F | RATHDRUM | ID |
| 2015-12-01 | 213-277 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY, LLC - CA | 649C | LSAN DA 10 | CA |
| 2015-12-01 | 231-216 | 0–9 XXXall 10 · 5 holders which blocks → | PEERLESS NETWORK OF MICHIGAN, LLC - MI | 933G | FRANKFORT | MI |
| 2015-12-01 | 231-442 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | PEERLESS NETWORK OF MICHIGAN, LLC - MI | 933G | HARRIETTA | MI |
| 2015-12-01 | 323-613 | 0–9 XXXall 10 · 2 holders which blocks → | ONVOY, LLC - CA | 649C | LSAN DA 03 | CA |
| 2015-12-01 | 424-370 | 0–9 XXXall 10 · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CMTN CMTN | CA |
| 2015-12-01 | 510-319 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY, LLC - CA | 649C | FRNK OLIVR | CA |
| 2015-12-01 | 539-202 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY, LLC - OK | 409F | TULSA | OK |
| 2015-12-01 | 587-490 | not yet reported which blocks → | TELUS | 8084 | Edmonton | — |
| 2015-12-01 | 628-201 | 0–9 XXXall 10 · 5 holders which blocks → | ONVOY, LLC - CA | 649C | SNFC CNTRL | CA |
| 2015-12-01 | 628-235 | 0–9 XXXall 10 · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNFC CNTRL | CA |
| 2015-12-01 | 628-243 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY, LLC - CA | 649C | SAN RAFAEL | CA |
| 2015-12-01 | 650-203 | 0–9 XXXall 10 · 3 holders which blocks → | BANDWIDTH.COM CLEC, LLC - CA | 981E | MT VIEW | CA |
| 2015-12-01 | 657-289 | 0–9 XXXall 10 · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SANTA ANA | CA |
| 2015-12-01 | 712-201 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY, LLC - IA | 221F | UNDERWOOD | IA |
| 2015-12-01 | 720-753 | 0–9 XXXall 10 · 6 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | FORTLUPTON | CO |
| 2015-12-01 | 865-500 | 0–9 XXXall 10 · 5 holders which blocks → | ONVOY, LLC - TN | 525E | KNOXVILLE | TN |
| 2015-12-01 | 867-466 | not yet reported which blocks → | Iristel Inc. | 154E | Whitehorse | — |
| 2015-12-01 | 873-730 | not yet reported which blocks → | Iristel Inc. | 154E | Amos | — |
| 2015-12-01 | 916-305 | 0–9 XXXall 10 · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | RSVL CTHT | CA |
| 2015-12-01 | 916-701 | 0–9 XXXall 10 · 6 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SCRM MAIN | CA |
| 2015-12-01 | 920-666 | 0–9 XXXall 10 · 5 holders which blocks → | ONVOY, LLC - WI | 225C | APPLETON | WI |
| 2015-11-30 | 260-308 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY, LLC - IN | 097D | GARRETT | IN |
| 2015-11-30 | 260-999 | 0–9 XXXall 10 · 6 holders which blocks → | ONVOY, LLC - IN | 097D | FORT WAYNE | IN |
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.