NumberResearchRecent prefix assignments
357 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/23/2026
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 |
|---|---|---|---|---|---|---|
| 2022-07-14 | 646-566 | 0–9 XXXwhole prefix which blocks → | ONVOY SPECTRUM, LLC | 624H | NWYRCYZN01 | NY |
| 2022-07-14 | 646-814 | 0–9 XXXwhole prefix which blocks → | ONVOY, LLC- NY | 384C | NWYRCYZN01 | NY |
| 2022-07-14 | 657-608 | 0–9 XXXall 10 · 5 holders which blocks → | T-MOBILE USA, INC. | 6529 | ORANGE | CA |
| 2022-07-14 | 669-320 | 0–9 XXXwhole prefix which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SARATOGA | CA |
| 2022-07-14 | 684-276 | not yet reported which blocks → | AST TELECOM, LLC | 1460 | AM SAMOA | AS |
| 2022-07-14 | 719-678 | 0–9 XXXall 10 · 4 holders which blocks → | HD CARRIER LLC | 321J | COLORDOSPG | CO |
| 2022-07-14 | 719-681 | 7XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - CO | 6118 | KARVAL | CO |
| 2022-07-14 | 782-317 | not yet reported which blocks → | Distributel | 081E | Charlottetown | — |
| 2022-07-14 | 782-318 | not yet reported which blocks → | Distributel | 081E | Alberton | — |
| 2022-07-14 | 782-319 | not yet reported which blocks → | Distributel | 081E | Borden | — |
| 2022-07-14 | 782-320 | not yet reported which blocks → | Distributel | 081E | Covehead | — |
| 2022-07-14 | 782-323 | not yet reported which blocks → | Distributel | 081E | Hunter River | — |
| 2022-07-14 | 782-325 | not yet reported which blocks → | Distributel | 081E | Kensington | — |
| 2022-07-14 | 782-326 | not yet reported which blocks → | Distributel | 081E | Montague | — |
| 2022-07-14 | 782-327 | not yet reported which blocks → | Distributel | 081E | Murray River | — |
| 2022-07-14 | 782-328 | not yet reported which blocks → | Distributel | 081E | New Haven | — |
| 2022-07-14 | 782-329 | not yet reported which blocks → | Distributel | 081E | O'Leary | — |
| 2022-07-14 | 782-330 | not yet reported which blocks → | Distributel | 081E | Rusticoville | — |
| 2022-07-14 | 782-331 | not yet reported which blocks → | Distributel | 081E | Souris | — |
| 2022-07-14 | 782-332 | not yet reported which blocks → | Distributel | 081E | Summerside | — |
| 2022-07-14 | 782-334 | not yet reported which blocks → | Distributel | 081E | Tignish | — |
| 2022-07-14 | 805-972 | 0–9 XXXall 10 · 4 holders which blocks → | T-MOBILE USA, INC. | 6529 | LOMPOC | CA |
| 2022-07-14 | 848-329 | 0–9 XXXall 10 · 5 holders which blocks → | OMNIPOINT COMMUNICATIONS, INC. - NJ | 6623 | TOMS RIVER | NJ |
| 2022-07-14 | 929-627 | 0–9 XXXall 10 · 2 holders which blocks → | OMNIPOINT COMMUNICATIONS, INC. - NY | 6622 | NWYRCYZN06 | NY |
| 2022-07-14 | 929-628 | 0–9 XXXall 10 · 4 holders which blocks → | OMNIPOINT COMMUNICATIONS, INC. - NY | 6622 | NWYRCYZN07 | NY |
| 2022-07-13 | 229-282 | 2XXX4XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - GA | 6116 | WARWICK | GA |
| 2022-07-13 | 341-241 | 0–9 XXXall 10 · 2 holders which blocks → | ONVOY, LLC - CA | 649C | HAYWARD | CA |
| 2022-07-13 | 346-573 | 0–9 XXXall 10 · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | CYPRESS | TX |
| 2022-07-13 | 414-373 | 0–9 XXXall 10 · 4 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MILWAUKZN1 | WI |
| 2022-07-13 | 442-387 | 4XXX5XXX which blocks → | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | SALTON | CA |
| 2022-07-13 | 505-526 | 0–9 XXXwhole prefix which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM | 6573 | ALBUQURQUE | NM |
| 2022-07-13 | 534-206 | 4XXX which blocks → | LEVEL 3 COMMUNICATIONS, LLC - WI | 5489 | BAY CITY | WI |
| 2022-07-13 | 661-649 | 0–9 XXXall 10 · 3 holders which blocks → | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | ARVIN | CA |
| 2022-07-13 | 662-921 | 0XXX6XXX which blocks → | ONVOY, LLC - MS | 719E | ISOLA | MS |
| 2022-07-13 | 662-938 | 0XXX6XXX which blocks → | ONVOY, LLC - MS | 719E | HOLLYBLUFF | MS |
| 2022-07-13 | 681-896 | 0–9 XXXall 10 · 3 holders which blocks → | TWILIO INTERNATIONAL, INC. | 506J | CLARKSBURG | WV |
| 2022-07-13 | 769-288 | 0XXX6XXX8XXX · 2 holders which blocks → | ONVOY, LLC - MS | 719E | BENNDALE | MS |
| 2022-07-13 | 775-495 | 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 3 holders which blocks → | T-MOBILE USA, INC. | 6529 | GARDNERVL | NV |
| 2022-07-13 | 808-897 | 0–9 XXXall 10 · 2 holders which blocks → | TWILIO INTERNATIONAL, INC. | 506J | HONOLULU | HI |
| 2022-07-13 | 951-612 | 0–9 XXXall 10 · 2 holders which blocks → | ONVOY, LLC - CA | 649C | BANNING | CA |
| 2022-07-12 | 240-935 | 0–9 XXXall 10 · 4 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 6395 | LAUREL236 | MD |
| 2022-07-12 | 256-954 | 0–9 XXXall 10 · 5 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL | 6804 | ANNISTON | AL |
| 2022-07-12 | 365-267 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Victoria | — |
| 2022-07-12 | 365-296 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Ridgeway | — |
| 2022-07-12 | 365-823 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Bethesda | — |
| 2022-07-12 | 365-824 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Keswick | — |
| 2022-07-12 | 458-269 | 0XXX1XXX7XXX · 3 holders which blocks → | BANDWIDTH.COM CLEC, LLC - OR | 076F | DRAIN | OR |
| 2022-07-12 | 513-224 | 0–9 XXXall 10 · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LEBANON | OH |
| 2022-07-12 | 516-814 | 0–9 XXXall 10 · 5 holders which blocks → | ONVOY, LLC- NY | 384C | NASSAUZN08 | NY |
| 2022-07-12 | 579-395 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Huntingdon | — |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.