NumberResearch Membership · Data 09/23/2026

Recent prefix assignments

357 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/23/2026

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. 39
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - DC 27
ONVOY, LLC - NJ 20
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
2011-09-01 336-490 0–9 XXXall 10 · 7 holders which blocks → WINDSTREAM NORTH CAROLINA, INC. 0476 DENTON NC
2011-09-01 336-815 0–9 XXXall 10 · 5 holders which blocks → WINDSTREAM NORTH CAROLINA, INC. 0476 OLDTOWN NC
2011-09-01 385-252 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2011-09-01 423-481 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - TN 124F ROAN MT TN
2011-09-01 570-550 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F WILKSBARRE PA
2011-09-01 570-664 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F STROUDSBG PA
2011-09-01 571-385 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN17 VA
2011-09-01 571-418 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F WSNGTNZN19 VA
2011-09-01 623-396 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2011-09-01 702-748 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 LAS VEGAS NV
2011-09-01 757-932 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F NRFOLKZON2 VA
2011-09-01 772-210 0–9 XXXall 10 · 6 holders which blocks → ITS FIBER, LLC 572G STUART FL
2011-09-01 786-334 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 MIAMI FL
2011-09-01 850-600 0–9 XXXall 10 · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C CHIPLEY FL
2011-09-01 954-228 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E CORAL SPG FL
2011-09-01 980-332 0–9 XXXall 10 · 6 holders which blocks → WINDSTREAM NORTH CAROLINA, INC. 0476 GRTQRRCKWL NC
2011-08-31 201-212 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 HACKENSACK NJ
2011-08-31 313-287 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN5 MI
2011-08-31 313-713 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN5 MI
2011-08-31 313-844 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN5 MI
2011-08-31 347-980 0–9 XXXall 10 · 2 holders which blocks → CSC VOICE, LLC 612K NWYRCYZN05 NY
2011-08-31 440-305 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F BEREA OH
2011-08-31 504-217 0–9 XXXall 10 · 5 holders which blocks → VOICESTREAM GSM I, LLC 150C KENNER LA
2011-08-31 504-357 0–9 XXXwhole prefix which blocks → VOICESTREAM GSM I, LLC 150C NEWORLEANS LA
2011-08-31 603-400 0–9 XXXall 10 · 3 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K HOLLIS NH
2011-08-31 609-422 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 TRENTON NJ
2011-08-31 786-651 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NORTH DADE FL
2011-08-31 786-657 0–9 XXXall 10 · 3 holders which blocks → AT&T ENTERPRISES, LLC 516C NORTH DADE FL
2011-08-31 819-939 not yet reported which blocks → Bell Canada 8050 Ottawa-Hull —
2011-08-31 850-400 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 MILTON FL
2011-08-30 202-417 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN1 DC
2011-08-30 412-709 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PTTSBGZON1 PA
2011-08-30 424-286 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CMTN GRDN CA
2011-08-30 502-806 0–9 XXXall 10 · 4 holders which blocks → BRANDENBURG TELECOM, LLC - KY 5672 WEST POINT KY
2011-08-30 505-835 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC - NM 206F ALBUQURQUE NM
2011-08-30 573-969 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K CENTRALIA MO
2011-08-30 805-399 0–9 XXXall 10 · 4 holders which blocks → WIDE VOICE, LLC - CA 252F SAN MIGUEL CA
2011-08-30 810-292 0–9 XXXall 10 · 7 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 PORT HURON MI
2011-08-30 819-914 not yet reported which blocks → ISP Telecom Inc. 4727 Ottawa-Hull —
2011-08-30 819-915 not yet reported which blocks → ISP Telecom Inc. 4727 Aylmer —
2011-08-30 819-916 not yet reported which blocks → ISP Telecom Inc. 4727 Gatineau —
2011-08-29 475-282 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CT 199F BRIDGEPORT CT
2011-08-29 507-580 0XXX1XXX2XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → MIDCONTINENT COMMUNICATIONS - MN 429A ELGIN MN
2011-08-29 580-433 not yet reported which blocks → CROSS-VALLIANT CELLULAR PARTNERSHIP 387E VALLIANT OK
2011-08-29 580-728 not yet reported which blocks → CROSS-VALLIANT CELLULAR PARTNERSHIP 387E IDABEL OK
2011-08-29 705-813 not yet reported which blocks → TELUS Integrated Communications 2782 Peterborough —
2011-08-29 705-980 not yet reported which blocks → Iristel Inc. 154E North Bay —
2011-08-26 321-333 0–9 XXXall 10 · 4 holders which blocks → TERRA NOVA TELECOM, INC. - FL 382G KISSIMMEE FL
2011-08-26 404-337 0–9 XXXwhole prefix which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA GA
2011-08-26 408-707 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C SNJS NORTH CA

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.