NumberResearch Membership · Data 09/29/2026

Recent prefix assignments

347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026

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 28
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
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
2018-10-04 469-578 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANDPRARI TX
2018-10-04 469-584 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 MCKINNEY TX
2018-10-04 530-560 0–9 XXXall 10 · 5 holders which blocks → AIRESPRING, INC. 996H REDDING CA
2018-10-04 602-563 0–9 XXXall 10 · 5 holders which blocks → AIRESPRING, INC. 996H PHOENIX AZ
2018-10-04 603-519 0–9 XXXall 10 · 5 holders which blocks → BELL ATLANTIC MOBILE, INC 6386 EXETER NH
2018-10-04 610-484 0–9 XXXall 10 · 8 holders which blocks → AIRESPRING, INC. 996H READING PA
2018-10-04 616-287 0–9 XXXall 10 · 2 holders which blocks → TELNET WORLDWIDE, INC. 817J GRAND RPDS MI
2018-10-04 650-439 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MT VIEW CA
2018-10-04 708-556 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FOREST IL
2018-10-04 720-614 0–9 XXXall 10 · 3 holders which blocks → AIRESPRING, INC. 996H DENVER CO
2018-10-04 747-284 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 AGOURA CA
2018-10-04 747-301 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 AGOURA CA
2018-10-04 856-360 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MOORESTOWN NJ
2018-10-04 913-346 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - KS 986E BONNER SPG KS
2018-10-04 980-294 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E ALTON NC
2018-10-04 980-375 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E DENVER NC
2018-10-03 207-888 0–9 XXXall 10 · 5 holders which blocks → TERRA NOVA TELECOM INC. 145J PORTLAND ME
2018-10-03 289-226 not yet reported which blocks → Videotron Ltd. 383F Grafton —
2018-10-03 343-636 not yet reported which blocks → Videotron Ltd. 383F Ingleside —
2018-10-03 343-980 not yet reported which blocks → Videotron Ltd. 383F Petawawa —
2018-10-03 346-366 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 LANGHAMCRK TX
2018-10-03 613-705 not yet reported which blocks → Videotron Ltd. 383F Mallorytown —
2018-10-03 618-422 0–9 XXXall 10 · 6 holders which blocks → FUTIVA, LLC - IL 248J MARION IL
2018-10-03 682-274 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 ARLINGTON TX
2018-10-03 782-777 not yet reported which blocks → TELUS Mobility 8303 Sydney —
2018-10-03 843-960 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - SC 548E MCCOLL SC
2018-10-03 843-962 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC 6398 BEAUFORT SC
2018-10-03 843-966 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - SC 548E SOCIETY HL SC
2018-10-03 858-269 0–9 XXXall 10 · 5 holders which blocks → PACIFIC BELL 9740 POWAY CA
2018-10-02 236-978 not yet reported which blocks → TELUS Mobility 8301 Vancouver —
2018-10-02 236-979 not yet reported which blocks → TELUS Mobility 8301 Vancouver —
2018-10-02 343-737 not yet reported which blocks → Videotron Ltd. 383F St-Regis —
2018-10-02 343-970 not yet reported which blocks → Videotron Ltd. 383F Cobden —
2018-10-02 623-473 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2018-10-02 727-285 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 CLEARWATER FL
2018-10-02 737-249 0–9 XXXall 10 · 7 holders which blocks → IP GLOBAL NETWORKS - TX 763H AUSTIN TX
2018-10-02 984-245 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 DURHAM NC
2018-10-01 581-862 not yet reported which blocks → Videotron Ltd. 8306 Baie-Comeau (Hauterive) —
2018-10-01 586-525 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 ARMADA MI
2018-10-01 646-987 0–9 XXXwhole prefix which blocks → PAETEC ITEL, LLC 829J NWYRCYZN01 NY
2018-10-01 681-641 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → ONVOY, LLC - WV 449F SETH WV
2018-10-01 681-691 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - WV 449F SCOTTDEPOT WV
2018-10-01 681-861 0XXX1XXX3XXX6XXX8XXX · 3 holders which blocks → ONVOY, LLC - WV 449F IVYDALE WV
2018-10-01 732-760 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DUNELLEN NJ
2018-10-01 908-440 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ELIZABETH NJ
2018-10-01 914-317 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 WSCHSTZN04 NY
2018-10-01 929-492 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 NWYRCYZN15 NY
2018-09-28 223-212 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - PA 547E CARLISLE PA
2018-09-28 229-280 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - GA 067D JAKIN GA
2018-09-28 229-360 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - GA 067D OCHLOCKNEE GA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.