NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

355 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
ONVOY, LLC - CA 31
NEW CINGULAR WIRELESS PCS, LLC - IL 28
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
2010-06-08 601-715 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS 6396 JACKSON MS
2010-06-08 647-389 not yet reported which blocks → Bell Mobility 6574 Toronto —
2010-06-08 647-522 not yet reported which blocks → Bell Mobility 6574 Toronto —
2010-06-08 706-251 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 AUGUSTA GA
2010-06-08 734-430 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - MI 991E MONROE MI
2010-06-08 780-680 not yet reported which blocks → Videotron Ltd. 383F Edmonton —
2010-06-08 786-477 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MIAMI FL
2010-06-08 819-238 not yet reported which blocks → Bell Mobility 6574 Sherbrooke —
2010-06-08 850-898 0–9 XXXall 10 · 7 holders which blocks → METROPCS, INC. 5562 PENSACOLA FL
2010-06-07 229-499 0–9 XXXall 10 · 4 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ALBANY GA
2010-06-07 315-400 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E FAYETTEVL NY
2010-06-07 323-248 0–9 XXXall 10 · 4 holders which blocks → PACIFIC BELL 9740 MONTEBELLO CA
2010-06-07 336-615 0–9 XXXall 10 · 2 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 GREENSBORO NC
2010-06-07 504-345 0–9 XXXall 10 · 3 holders which blocks → VOICESTREAM GSM I, LLC 150C NEWORLEANS LA
2010-06-07 571-319 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J WSNGTNZN08 VA
2010-06-07 646-692 0–9 XXXall 10 · 3 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 NWYRCYZN01 NY
2010-06-07 720-393 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 TELECOM OF COLORADO, LLC - CO 4574 DENVER CO
2010-06-07 828-785 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 ASHEVILLE NC
2010-06-07 980-208 0–9 XXXall 10 · 3 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 CHARLOTTE NC
2010-06-04 204-619 not yet reported which blocks → MTS Inc. 991B Winnipeg —
2010-06-04 210-501 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SANANTONIO TX
2010-06-04 226-300 not yet reported which blocks → Quadro Communications Co-operative Inc. 004G Stratford —
2010-06-04 226-301 not yet reported which blocks → Quadro Communications Co-operative Inc. 004G St. Marys —
2010-06-04 226-302 not yet reported which blocks → Quadro Communications Co-operative Inc. 004G Dublin —
2010-06-04 226-303 not yet reported which blocks → Quadro Communications Co-operative Inc. 004G Mitchell —
2010-06-04 226-304 not yet reported which blocks → Quadro Communications Co-operative Inc. 004G Lucan —
2010-06-04 226-772 not yet reported which blocks → Zayo Canada Inc. 8304 Kitchener-Waterloo —
2010-06-04 267-227 0–9 XXXall 10 · 6 holders which blocks → PAETEC ITEL, LLC 829J QUAKERTOWN PA
2010-06-04 289-988 not yet reported which blocks → TELUS Mobility 8303 Ajax-Pickering —
2010-06-04 404-859 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA GA
2010-06-04 408-675 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SUNNYVALE CA
2010-06-04 408-684 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNJS NORTH CA
2010-06-04 424-231 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNMN SNMN CA
2010-06-04 450-365 not yet reported which blocks → TELUS Mobility 8303 Joliette —
2010-06-04 484-353 0–9 XXXall 10 · 7 holders which blocks → METROPCS, INC. 5562 BETHLEHEM PA
2010-06-04 506-812 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Meductic —
2010-06-04 509-828 0–9 XXXall 10 · 4 holders which blocks → QWEST CORPORATION 9638 SPOKANE WA
2010-06-04 559-546 0–9 XXXall 10 · 6 holders which blocks → WIDE VOICE, LLC - CA 252F SANGER CA
2010-06-04 604-758 not yet reported which blocks → Shaw Telecom Inc. 497E Abbotsford —
2010-06-04 619-870 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CHULAVISTA CA
2010-06-04 647-256 not yet reported which blocks → Zayo Canada Inc. 8304 Toronto —
2010-06-04 706-501 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 WEST POINT GA
2010-06-04 862-261 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - NJ 7142 BOONTON NJ
2010-06-04 916-913 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM NORTH CA
2010-06-03 229-733 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ALBANY GA
2010-06-03 269-364 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 KALAMAZOO MI
2010-06-03 317-559 0–9 XXXwhole prefix which blocks → PEERLESS NETWORK OF INDIANA, LLC - IN 279F INDIANAPLS IN
2010-06-03 404-416 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA GA
2010-06-03 404-989 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA GA
2010-06-03 801-871 0–9 XXXall 10 · 6 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7176 MIDVALE UT

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.