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
2016-09-26 571-371 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J WSNGTNZN08 VA
2016-09-26 661-386 0–9 XXXall 10 · 4 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K ROSAMOND CA
2016-09-26 669-285 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 SNJS SOUTH CA
2016-09-26 909-751 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 S BERNDINO CA
2016-09-26 916-345 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 SCRM NORTH CA
2016-09-26 916-892 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F ELK GROVE CA
2016-09-26 972-430 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 BLUE RIDGE TX
2016-09-24 516-266 0–9 XXXall 10 · 6 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 NASSAUZN04 NY
2016-09-24 646-809 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN01 NY
2016-09-23 231-545 0XXX1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 5 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K BOYNEFALLS MI
2016-09-23 315-920 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LIVERPOOL NY
2016-09-23 365-803 not yet reported which blocks → Iristel Inc. 154E Aurora —
2016-09-23 484-513 0–9 XXXall 10 · 5 holders which blocks → D&E/OMNIPOINT WIREL JOINT VENT LP DBA PCS ONE 6846 READING PA
2016-09-23 516-373 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NASSAUZN01 NY
2016-09-23 516-675 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NASSAUZN02 NY
2016-09-23 563-239 0–9 XXXall 10 · 7 holders which blocks → MCC TELEPHONY OF IOWA, LLC - IA 751F DUBUQUE IA
2016-09-23 581-770 not yet reported which blocks → Videotron Ltd. 8306 Sainte-Rose —
2016-09-23 581-771 not yet reported which blocks → Videotron Ltd. 8306 Sainte-Justine —
2016-09-23 581-772 not yet reported which blocks → Videotron Ltd. 8306 Saint-Odilon —
2016-09-23 581-773 not yet reported which blocks → Videotron Ltd. 8306 Saint-Zacharie —
2016-09-23 581-774 not yet reported which blocks → Cooptel 818D Saint-Camille —
2016-09-23 616-278 0–9 XXXall 10 · 7 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRAND RPDS MI
2016-09-23 646-940 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN01 NY
2016-09-23 646-972 0–9 XXXwhole prefix which blocks → METROPCS, INC. 5562 NWYRCYZN01 NY
2016-09-23 646-992 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN01 NY
2016-09-23 712-535 0–9 XXXall 10 · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J SIOUX CITY IA
2016-09-23 782-450 not yet reported which blocks → Bragg Communications Inc. 4878 Eskasoni —
2016-09-23 804-676 0–9 XXXall 10 · 7 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K WAVERLY VA
2016-09-23 845-904 0XXX1XXX2XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC- NY 384C CLINTONDL NY
2016-09-23 908-357 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 LINDEN NJ
2016-09-23 916-465 0–9 XXXall 10 · 4 holders which blocks → FIDIUM ENTERPRISE SERVICES, LLC 3964 SCRM MAIN CA
2016-09-23 916-886 0–9 XXXall 10 · 5 holders which blocks → FIDIUM ENTERPRISE SERVICES, LLC 3964 RSVL MAIN CA
2016-09-23 929-420 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN06 NY
2016-09-23 929-426 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN09 NY
2016-09-23 929-427 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN07 NY
2016-09-23 929-435 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN08 NY
2016-09-23 980-260 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - NC 8389 CHARLOTTE NC
2016-09-22 205-878 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 JASPER AL
2016-09-22 302-488 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - DE 969E HARRINGTON DE
2016-09-22 315-990 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC- NY 384C HEUVELTON NY
2016-09-22 315-994 0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC- NY 384C POPLAR RDG NY
2016-09-22 315-995 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC- NY 384C RED CREEK NY
2016-09-22 315-998 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC- NY 384C MORRISTOWN NY
2016-09-22 365-712 not yet reported which blocks → Bell Canada 8051 Brampton —
2016-09-22 365-713 not yet reported which blocks → Bell Canada 8051 Burlington —
2016-09-22 365-714 not yet reported which blocks → Bell Canada 8051 Cobourg —
2016-09-22 365-715 not yet reported which blocks → Bell Canada 8051 Hamilton —
2016-09-22 365-716 not yet reported which blocks → Bell Canada 8051 Oshawa —
2016-09-22 365-717 not yet reported which blocks → Bell Canada 8051 Richmond Hill —
2016-09-22 365-718 not yet reported which blocks → Bell Canada 8051 St. Catharines-Thorold —

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.