NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
ONVOY, LLC - CA 21
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
2021-12-06 551-342 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 UNION CITY NJ
2021-12-06 640-221 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MOUNTHOLLY NJ
2021-12-06 640-223 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 PEMBERTON NJ
2021-12-06 640-225 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 LAWRENCEVL NJ
2021-12-06 662-859 0XXX8XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - MS 992E CALEDONIA MS
2021-12-06 742-234 not yet reported which blocks → TELUS Integrated Communications 2782 Milton —
2021-12-06 862-391 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 HOPATCONG NJ
2021-12-06 870-560 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PARAGOULD AR
2021-12-06 908-549 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 BERNARDSVL NJ
2021-12-03 229-553 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BAINBRIDGE GA
2021-12-03 251-381 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 478J MOBILE AL
2021-12-03 260-291 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - IN 105F LEO IN
2021-12-03 269-402 2XXX3XXX4XXX · 2 holders which blocks → ONVOY, LLCV - MI 543C GLENN MI
2021-12-03 318-785 0XXX6XXX8XXX · 3 holders which blocks → CSC VOICE, LLC 612K MOREAUVL LA
2021-12-03 321-378 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MELBOURNE FL
2021-12-03 351-220 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 ACTON MA
2021-12-03 351-228 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E ANDOVER MA
2021-12-03 401-394 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 PASCOAG RI
2021-12-03 409-285 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - TX 903C WOODVILLE TX
2021-12-03 430-288 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 478J TYLER TX
2021-12-03 432-316 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 478J ODESSA TX
2021-12-03 463-264 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - IN 097D FORTVILLE IN
2021-12-03 475-320 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - CT 6624 ANSONIDRBY CT
2021-12-03 563-338 8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOPKINTON IA
2021-12-03 563-509 9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LIME SPG IA
2021-12-03 585-614 3XXX4XXX6XXX · 3 holders which blocks → ONVOY, LLC- NY 384C SHORTSVL NY
2021-12-03 641-252 2XXX4XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DUMONT IA
2021-12-03 641-506 9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ZEARING IA
2021-12-03 641-916 6XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ST CHARLES IA
2021-12-03 667-374 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - MD 071F WATERLO238 MD
2021-12-03 715-728 1XXX2XXX which blocks → NUSO, LLC 478J EAU CLAIRE WI
2021-12-03 720-906 1XXX which blocks → COMCAST IP PHONE, LLC 318J BYERS CO
2021-12-03 727-486 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 CLEARWATER FL
2021-12-03 781-692 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 BRAINTREE MA
2021-12-03 781-809 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 DEDHAM MA
2021-12-03 782-980 not yet reported which blocks → ISP Telecom Inc. 4727 Wallace —
2021-12-03 782-981 not yet reported which blocks → ISP Telecom Inc. 4727 Wolfville —
2021-12-03 782-982 not yet reported which blocks → ISP Telecom Inc. 4727 Windsor —
2021-12-03 830-375 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C BOERNE TX
2021-12-03 857-391 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 CHARLESTN MA
2021-12-03 901-657 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 SOMERVILLE TN
2021-12-03 912-613 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 DOUGLAS GA
2021-12-03 937-891 8XXX which blocks → TWILIO INTERNATIONAL, INC. 506J CEDARVILLE OH
2021-12-03 959-237 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - CT 6624 GLASTONBY CT
2021-12-02 213-646 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 LSAN DA 05 CA
2021-12-02 249-563 not yet reported which blocks → Fibernetics Corporation 464D Algonquin Park —
2021-12-02 249-564 not yet reported which blocks → Fibernetics Corporation 464D Baysville —
2021-12-02 249-565 not yet reported which blocks → Fibernetics Corporation 464D Britt —
2021-12-02 249-566 not yet reported which blocks → Fibernetics Corporation 464D Dwight —
2021-12-02 249-567 not yet reported which blocks → Fibernetics Corporation 464D Emsdale —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.