NumberResearch Membership · Data 09/23/2026

Recent prefix assignments

338 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
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 15
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
2004-09-15 907-382 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 GIRDWOOD AK
2004-09-15 918-413 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 POTEAU OK
2004-09-14 203-636 0–9 XXXall 10 · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 DARIEN CT
2004-09-14 804-210 0–9 XXXall 10 · 6 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 GLOUCESTER VA
2004-09-14 828-557 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 SUIT NC
2004-09-13 612-262 0–9 XXXwhole prefix which blocks → QWEST CORPORATION 9631 TWINCITIES MN
2004-09-10 469-226 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 GRANDPRARI TX
2004-09-10 570-396 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 MONTROSE PA
2004-09-10 570-529 6XXX7XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 TROY PA
2004-09-10 570-637 9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 TOWANDA PA
2004-09-10 570-721 4XXX5XXX6XXX7XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 WYALUSING PA
2004-09-10 860-762 not yet reported which blocks → AQUIS COMMUNICATIONS, INC. 6919 HARTFORD CT
2004-09-10 951-638 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 TEMSCL CNY CA
2004-09-10 972-310 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANDPRARI TX
2004-09-10 972-415 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANDPRARI TX
2004-09-10 972-762 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANDPRARI TX
2004-09-10 972-804 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANDPRARI TX
2004-09-10 972-900 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANDPRARI TX
2004-09-09 430-255 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF TEXAS, LLC - TX 177F KEMP TX
2004-09-09 469-212 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 GRANDPRARI TX
2004-09-08 204-993 not yet reported which blocks → TELUS Mobility 8303 Steinbach —
2004-09-08 204-994 not yet reported which blocks → TELUS Mobility 8303 Selkirk —
2004-09-08 330-302 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 LODI OH
2004-09-08 330-331 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 WADSWORTH OH
2004-09-08 662-744 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 EUPORA MS
2004-09-08 712-893 not yet reported which blocks → COMMCHOICE OF IOWA, LLC 4092 DANBURY IA
2004-09-07 216-286 0–9 XXXwhole prefix which blocks → OHIO BELL TEL CO 9321 CLEVELAND OH
2004-09-07 308-890 not yet reported which blocks → N.E. COLORADO CELLULAR, INC. 6874 CHAPPELL NE
2004-09-07 703-300 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN17 VA
2004-09-07 773-318 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN03 IL
2004-09-07 773-414 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2004-09-07 830-331 0–9 XXXall 10 · 5 holders which blocks → GUADALUPE VALLEY COMMUNICATIONS SYSTEMS, LP - TX 9872 BOERNE TX
2004-09-07 910-556 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 VASS NC
2004-09-03 209-888 0–9 XXXall 10 · 7 holders which blocks → UTILITY TELECOM GROUP, LLC - CA 9262 STOCKTON CA
2004-09-03 254-979 3XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DE LEON TX
2004-09-02 256-660 0–9 XXXall 10 · 7 holders which blocks → POWERTEL BIRMINGHAM LICENSES, INC. 7475 ALBERTVL AL
2004-09-02 416-553 not yet reported which blocks → Bell Mobility 6574 Toronto —
2004-09-02 450-828 not yet reported which blocks → Fido Solutions Inc. 5643 Chomedey —
2004-09-02 450-860 not yet reported which blocks → Fido Solutions Inc. 5643 Laval-Ouest —
2004-09-02 450-862 not yet reported which blocks → Fido Solutions Inc. 5643 Ste-Rose —
2004-09-02 450-863 not yet reported which blocks → Fido Solutions Inc. 5643 Pont-Viau —
2004-09-02 502-522 0–9 XXXwhole prefix which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 LOUISVILLE KY
2004-09-02 514-269 not yet reported which blocks → TELUS Mobility 8303 Montreal —
2004-09-02 514-681 not yet reported which blocks → Fido Solutions Inc. 5643 Ile-Perrot —
2004-09-02 514-682 not yet reported which blocks → Fido Solutions Inc. 5643 Ste-Genevieve —
2004-09-02 514-689 not yet reported which blocks → Fido Solutions Inc. 5643 Lachine —
2004-09-02 617-820 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BOSTON MA
2004-09-02 630-303 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 NAPERVILLE IL
2004-09-02 781-214 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 HULL MA
2004-09-02 972-533 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANDPRARI TX

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.