NumberResearch Membership · Data 09/29/2026

Recent prefix assignments

347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

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
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
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
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2019-08-26 365-828 not yet reported which blocks → Rogers Communications Canada Inc. 571G Bradford —
2019-08-26 405-862 0–9 XXXall 10 · 4 holders which blocks → UNITED STATES CELLULAR - OK 6272 OKLA CITY OK
2019-08-26 430-600 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H HENDERSON TX
2019-08-26 520-472 0–9 XXXall 10 · 5 holders which blocks → QWEST CORPORATION 9636 CASAGRANDE AZ
2019-08-26 548-338 not yet reported which blocks → Rogers Communications Canada Inc. 571G Brantford —
2019-08-26 559-569 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FRESNO CA
2019-08-26 605-525 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → VALLEY COMMUNICATIONS, INC. D/B/A VALLEY FIBERCOM 363J LK PRESTON SD
2019-08-26 609-966 0–9 XXXall 10 · 4 holders which blocks → EXIANT COMMUNICATIONS LLC 114J PLEASANTVL NJ
2019-08-26 623-471 0–9 XXXall 10 · 3 holders which blocks → QWEST CORPORATION 9636 PHOENIX AZ
2019-08-26 628-268 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2019-08-26 629-236 0–9 XXXall 10 · 3 holders which blocks → EXIANT COMMUNICATIONS LLC 114J NASHVILLE TN
2019-08-26 657-392 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-08-26 657-394 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 HUNTITNBCH CA
2019-08-26 707-680 0–9 XXXall 10 · 6 holders which blocks → UNITED STATES CELLULAR - CA 6261 WILLITS CA
2019-08-26 719-463 0–9 XXXall 10 · 5 holders which blocks → EXIANT COMMUNICATIONS LLC 114J COLORDOSPG CO
2019-08-26 747-288 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CANOGAPARK CA
2019-08-26 762-246 0–9 XXXall 10 · 5 holders which blocks → EXIANT COMMUNICATIONS LLC 114J AUGUSTA GA
2019-08-26 769-253 0–9 XXXall 10 · 4 holders which blocks → EXIANT COMMUNICATIONS LLC 114J JACKSON MS
2019-08-26 806-877 1XXX2XXX6XXX7XXX · 3 holders which blocks → FRACTEL, LLC 965H AMARILLO TX
2019-08-26 806-955 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H LUBBOCK TX
2019-08-26 845-760 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NANUET NY
2019-08-26 865-367 0–9 XXXall 10 · 3 holders which blocks → EXIANT COMMUNICATIONS LLC 114J KNOXVILLE TN
2019-08-26 901-456 0–9 XXXall 10 · 3 holders which blocks → EXIANT COMMUNICATIONS LLC 114J MEMPHIS TN
2019-08-26 909-739 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 UPLAND CA
2019-08-26 956-677 0XXX1XXX7XXX8XXX9XXX · 2 holders which blocks → FRACTEL, LLC 965H HARLINGEN TX
2019-08-26 956-977 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H LAREDO TX
2019-08-23 225-254 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - LA 153F WILSON LA
2019-08-23 365-282 not yet reported which blocks → Rogers Communications Canada Inc. 571G Ajax-Pickering —
2019-08-23 365-585 not yet reported which blocks → Rogers Communications Canada Inc. 571G Aurora —
2019-08-23 386-529 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H PALM COAST FL
2019-08-23 386-639 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H BRANFORD FL
2019-08-23 480-573 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PHOENIX AZ
2019-08-23 520-380 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 CASAGRANDE AZ
2019-08-23 531-238 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - NE 549E RANDOLPH NE
2019-08-23 548-822 not yet reported which blocks → Rogers Communications Canada Inc. 571G Ayr —
2019-08-23 720-673 0–9 XXXall 10 · 5 holders which blocks → EXIANT COMMUNICATIONS LLC 114J DENVER CO
2019-08-22 260-529 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H LEO IN
2019-08-22 260-800 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H FORT WAYNE IN
2019-08-22 260-900 0XXX1XXX2XXX3XXX4XXX6XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H ZANESVILLE IN
2019-08-22 276-213 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 BRISTOL VA
2019-08-22 417-900 0XXX1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H MARIONVL MO
2019-08-22 431-601 not yet reported which blocks → MTS Inc. 8088 Winnipeg —
2019-08-22 531-235 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - NE 549E EMERSON NE
2019-08-22 531-236 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - NE 549E HUMPHREY NE
2019-08-22 531-237 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - NE 549E PENDER NE
2019-08-22 606-222 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H SOMERSET KY
2019-08-22 657-391 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ORANGE CA
2019-08-22 763-298 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - MN 980E CAMBRIDGE MN
2019-08-22 867-330 not yet reported which blocks → Bell Mobility 6574 Naujaat —
2019-08-21 341-333 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H OKLD BKLY CA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.