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 |
|---|---|---|---|---|---|---|
| 2022-10-21 | 928-495 | 0–9 XXXall 10 · 4 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | PRESCOTT | AZ |
| 2022-10-21 | 949-745 | 0–9 XXXall 10 · 3 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | IRVINE | CA |
| 2022-10-21 | 951-620 | 0–9 XXXall 10 · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - CA | 981E | ELSINORE | CA |
| 2022-10-21 | 971-441 | 0–9 XXXall 10 · 3 holders which blocks → | BANDWIDTH.COM CLEC, LLC - OR | 076F | BEAVERTON | OR |
| 2022-10-21 | 986-237 | 0XXX which blocks → | FARMERS MUTUAL TEL. CO. | 2221 | FRUITLAND | ID |
| 2022-10-21 | 986-238 | 0XXX1XXX2XXX4XXX8XXX9XXX · 3 holders which blocks → | ONVOY, LLC - ID | 689F | PRIEST RIV | ID |
| 2022-10-20 | 279-235 | 0–9 XXXall 10 · 5 holders which blocks → | METROPCS, INC. | 5562 | FOLSOM | CA |
| 2022-10-20 | 343-947 | not yet reported which blocks → | Iristel Inc. | 154E | Bancroft | — |
| 2022-10-20 | 346-601 | 0–9 XXXall 10 · 2 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TX | 004F | HOUSTON | TX |
| 2022-10-20 | 548-554 | not yet reported which blocks → | Iristel Inc. | 154E | Aylmer | — |
| 2022-10-20 | 551-361 | 0–9 XXXall 10 · 4 holders which blocks → | BANDWIDTH.COM CLEC, LLC - NJ | 118F | HACKENSACK | NJ |
| 2022-10-20 | 562-442 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY, LLC - CA | 649C | WHITTIER | CA |
| 2022-10-20 | 669-326 | 0–9 XXXall 10 · 4 holders which blocks → | METROPCS, INC. | 5562 | SNJS NORTH | CA |
| 2022-10-20 | 858-351 | 0–9 XXXall 10 · 3 holders which blocks → | HD CARRIER LLC | 321J | SNDG SNDG | CA |
| 2022-10-20 | 910-994 | 0–9 XXXwhole prefix which blocks → | ONVOY, LLC - NC | 638E | RAEFORD | NC |
| 2022-10-20 | 940-493 | 0–9 XXXwhole prefix which blocks → | T-MOBILE USA, INC. | 6529 | DENTON | TX |
| 2022-10-20 | 940-629 | 0–9 XXXwhole prefix which blocks → | T-MOBILE USA, INC. | 6529 | DENTON | TX |
| 2022-10-20 | 971-440 | 0–9 XXXwhole prefix which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BEAVERTON | OR |
| 2022-10-19 | 343-316 | not yet reported which blocks → | Iristel Inc. | 154E | Cornwall | — |
| 2022-10-19 | 365-530 | not yet reported which blocks → | Iristel Inc. | 154E | Woodbridge | — |
| 2022-10-19 | 412-806 | 0–9 XXXall 10 · 4 holders which blocks → | BANDWIDTH.COM CLEC, LLC - PA | 002F | PTTSBGZON1 | PA |
| 2022-10-19 | 425-384 | 0–9 XXXall 10 · 5 holders which blocks → | T-MOBILE USA, INC. | 6529 | BOTHELL | WA |
| 2022-10-19 | 506-541 | not yet reported which blocks → | Iristel Inc. | 154E | Woodstock | — |
| 2022-10-19 | 509-273 | 0–9 XXXall 10 · 2 holders which blocks → | T-MOBILE USA, INC. | 6529 | ELLENSBURG | WA |
| 2022-10-19 | 516-951 | 0–9 XXXall 10 · 3 holders which blocks → | BANDWIDTH.COM CLEC, LLC - NY | 997E | NASSAUZN01 | NY |
| 2022-10-19 | 539-287 | 0XXX1XXX2XXX3XXX7XXX8XXX · 5 holders which blocks → | AT&T ENTERPRISES, LLC | 516C | YALE | OK |
| 2022-10-19 | 548-410 | not yet reported which blocks → | Iristel Inc. | 154E | Goderich | — |
| 2022-10-19 | 548-829 | not yet reported which blocks → | Iristel Inc. | 154E | Wingham | — |
| 2022-10-19 | 575-867 | 0–9 XXXall 10 · 4 holders which blocks → | COMMIO, LLC | 939H | ANTHONY | NM |
| 2022-10-19 | 640-236 | 0–9 XXXall 10 · 2 holders which blocks → | BANDWIDTH.COM CLEC, LLC - NJ | 118F | ATLNTIC CY | NJ |
| 2022-10-19 | 640-867 | 0–9 XXXall 10 · 4 holders which blocks → | COMMIO, LLC | 939H | PRINCETON | NJ |
| 2022-10-19 | 640-962 | 0–9 XXXwhole prefix which blocks → | ONVOY, LLC - NJ | 637C | PRINCETON | NJ |
| 2022-10-19 | 672-755 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Vancouver | — |
| 2022-10-19 | 689-285 | 0–9 XXXall 10 · 3 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - FL | 8300 | ORLANDO | FL |
| 2022-10-19 | 769-293 | 0–9 XXXwhole prefix which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | VICKSBURG | MS |
| 2022-10-19 | 782-203 | not yet reported which blocks → | Iristel Inc. | 154E | Weymouth | — |
| 2022-10-19 | 807-781 | not yet reported which blocks → | Iristel Inc. | 154E | Atikokan | — |
| 2022-10-19 | 808-289 | 0–9 XXXall 10 · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - HI | 6516 | HILO | HI |
| 2022-10-19 | 808-751 | 0–9 XXXall 10 · 3 holders which blocks → | T-MOBILE USA, INC. | 6529 | HONOLULU | HI |
| 2022-10-19 | 828-880 | 0XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → | ONVOY, LLC - NC | 638E | SHERILLSFD | NC |
| 2022-10-19 | 848-337 | 0–9 XXXall 10 · 2 holders which blocks → | BANDWIDTH.COM CLEC, LLC - NJ | 118F | PTPLEASANT | NJ |
| 2022-10-19 | 902-263 | not yet reported which blocks → | Iristel Inc. | 154E | Windsor | — |
| 2022-10-19 | 973-561 | 0–9 XXXall 10 · 3 holders which blocks → | BANDWIDTH.COM CLEC, LLC - NJ | 118F | ORANGE | NJ |
| 2022-10-18 | 213-686 | 0–9 XXXall 10 · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - CA | 981E | LSAN DA 11 | CA |
| 2022-10-18 | 213-838 | 0–9 XXXall 10 · 3 holders which blocks → | BANDWIDTH.COM CLEC, LLC - CA | 981E | LSAN DA 05 | CA |
| 2022-10-18 | 213-916 | 0–9 XXXall 10 · 4 holders which blocks → | BANDWIDTH.COM CLEC, LLC - CA | 981E | LSAN DA 14 | CA |
| 2022-10-18 | 223-723 | 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | ONVOY, LLC - PA | 547E | LOGANVILLE | PA |
| 2022-10-18 | 229-581 | 0–9 XXXwhole prefix which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | FITZGERALD | GA |
| 2022-10-18 | 240-963 | 0–9 XXXall 10 · 3 holders which blocks → | BANDWIDTH.COM CLEC, LLC - MD | 071F | WSHNGTNZN3 | MD |
| 2022-10-18 | 249-260 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Elliot Lake | — |
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.