NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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. 38
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
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
2010-09-30 915-741 0–9 XXXwhole prefix which blocks → LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7263 EL PASO TX
2010-09-30 978-830 0XXX1XXX3XXX4XXX8XXX9XXX · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K ATHOL MA
2010-09-29 276-254 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LEBANON VA
2010-09-29 276-439 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NORTON VA
2010-09-29 415-795 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2010-09-29 571-316 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 DALE CITY VA
2010-09-29 757-610 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 NRFOLKZON3 VA
2010-09-29 757-779 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 NRFOLKZON2 VA
2010-09-29 757-918 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 NRFOLKZON2 VA
2010-09-29 850-889 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E PACE FL
2010-09-29 915-742 0–9 XXXwhole prefix which blocks → LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7263 EL PASO TX
2010-09-29 989-623 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J BAD AXE MI
2010-09-28 276-528 0XXX1XXX2XXX3XXX5XXX8XXX · 4 holders which blocks → MIKROTEC OF VIRGINIA, LLC - VA 210F HURLEY VA
2010-09-28 302-585 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HOCKESSIN DE
2010-09-28 412-439 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PTTSBGZON1 PA
2010-09-28 506-820 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Chipman —
2010-09-28 514-587 not yet reported which blocks → Distributel 083E Montreal —
2010-09-28 516-350 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NASSAUZN05 NY
2010-09-28 581-887 not yet reported which blocks → TELUS Mobility 8303 Gaspe —
2010-09-28 587-282 not yet reported which blocks → TELUS Mobility 8301 Stettler —
2010-09-28 587-321 not yet reported which blocks → TELUS Mobility 8301 Three Hills —
2010-09-28 587-351 not yet reported which blocks → Shaw Telecom Inc. 497E Calgary —
2010-09-28 613-400 not yet reported which blocks → Videotron Ltd. 383F Ottawa-Hull —
2010-09-28 647-781 not yet reported which blocks → Videotron Ltd. 383F Toronto —
2010-09-28 647-782 not yet reported which blocks → Videotron Ltd. 383F Toronto —
2010-09-28 702-687 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LAUGHLIN NV
2010-09-28 702-861 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LAUGHLIN NV
2010-09-28 769-247 0–9 XXXall 10 · 8 holders which blocks → AT&T ENTERPRISES, LLC 516C WOODVILLE MS
2010-09-28 909-284 0–9 XXXall 10 · 5 holders which blocks → METROPCS NETWORKS, LLC 899D ONTARIO CA
2010-09-27 240-480 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN2 MD
2010-09-27 302-400 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 NEW CASTLE DE
2010-09-27 302-499 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 DELAWARECY DE
2010-09-27 317-597 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - IN 105F OAKLANDON IN
2010-09-27 425-247 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 TELECOM OF WASHINGTON, LLC - WA 7455 BELLEVUE WA
2010-09-27 443-680 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2010-09-27 505-392 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ABIQUIU NM
2010-09-27 720-458 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 TELECOM OF COLORADO, LLC - CO 4574 DENVER CO
2010-09-24 210-294 0–9 XXXall 10 · 3 holders which blocks → SOUTHWESTERN BELL 9533 SANANTONIO TX
2010-09-24 331-888 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E WARRENVL IL
2010-09-24 417-612 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 SPRINGFLD MO
2010-09-24 438-390 not yet reported which blocks → Videotron Ltd. 328F Montreal —
2010-09-24 540-398 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 WINCHESTER VA
2010-09-24 702-512 1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 JEAN NV
2010-09-24 702-751 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - NV 075F INDIAN SPG NV
2010-09-24 702-852 0–9 XXXall 10 · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LAS VEGAS NV
2010-09-24 702-915 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LAS VEGAS NV
2010-09-24 778-483 not yet reported which blocks → Shaw Telecom Inc. 497E Oyama —
2010-09-24 778-873 not yet reported which blocks → TELUS Mobility 8301 Vancouver —
2010-09-24 778-874 not yet reported which blocks → TELUS Mobility 8301 Vancouver —
2010-09-24 778-875 not yet reported which blocks → TELUS Mobility 8301 Vancouver —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.