NumberResearch Membership · Data 09/25/2026

Recent prefix assignments

358 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/25/2026

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 31
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
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
2013-02-19 737-777 0–9 XXXall 10 · 5 holders which blocks → FOREMOST TELECOMMUNICATIONS CORPORATION - TX 319D LEANDER TX
2013-02-19 832-856 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F HSTNSUBURB TX
2013-02-19 872-215 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHICGOZN07 IL
2013-02-18 415-521 0–9 XXXall 10 · 8 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SAN RAFAEL CA
2013-02-18 845-289 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J PAWLING NY
2013-02-18 917-966 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 NWYRCYZN06 NY
2013-02-15 204-814 not yet reported which blocks → Distributel 081E Portage La Prairie —
2013-02-15 204-901 not yet reported which blocks → Bell Mobility 6574 Brandon —
2013-02-15 204-902 not yet reported which blocks → Bell Mobility 6574 Oakbank —
2013-02-15 204-903 not yet reported which blocks → Bell Mobility 6574 Portage La Prairie —
2013-02-15 239-231 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 NAPLES FL
2013-02-15 289-798 not yet reported which blocks → Distributel 082E Burlington —
2013-02-15 289-961 not yet reported which blocks → Comwave Networks 160G Caledon East —
2013-02-15 424-295 0–9 XXXall 10 · 5 holders which blocks → METROPCS NETWORKS, LLC 899D CMTN GRDN CA
2013-02-15 609-831 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - NJ 118F FORT DIX NJ
2013-02-15 646-659 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
2013-02-15 702-781 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NV 075F INDIAN SPG NV
2013-02-15 775-432 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NV 075F RENO NV
2013-02-15 813-803 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E TAMPANTH FL
2013-02-15 872-702 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2013-02-15 917-244 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN06 NY
2013-02-15 917-473 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN03 NY
2013-02-15 929-226 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN05 NY
2013-02-15 949-535 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E IRVINE CA
2013-02-14 323-531 0–9 XXXall 10 · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K LSAN DA 09 CA
2013-02-14 512-991 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C LOMETA TX
2013-02-14 646-640 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J NWYRCYZN01 NY
2013-02-14 646-663 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 NWYRCYZN01 NY
2013-02-14 657-218 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K SANTA ANA CA
2013-02-14 657-220 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K ANAHEIM CA
2013-02-14 818-616 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K VAN NUYS CA
2013-02-13 210-718 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SANANTONIO TX
2013-02-13 256-808 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 551G HUNTSVILLE AL
2013-02-13 385-224 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2013-02-13 385-329 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2013-02-13 385-335 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2013-02-13 484-704 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHPHSBZN30 PA
2013-02-13 513-630 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 LTL MIAMI OH
2013-02-13 531-333 0–9 XXXall 10 · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J LINCOLN NE
2013-02-13 803-602 0–9 XXXall 10 · 6 holders which blocks → NUSO, LLC 551G COLUMBIA SC
2013-02-13 920-399 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → PLTC, LLC - WI 375F OCONTO FLS WI
2013-02-13 928-723 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - AZ 630E YUMA AZ
2013-02-12 226-545 not yet reported which blocks → Bell Mobility 6574 Aylmer —
2013-02-12 289-912 not yet reported which blocks → Comwave Networks 160G Port Perry —
2013-02-12 289-913 not yet reported which blocks → Comwave Networks 160G Ajax-Pickering —
2013-02-12 289-915 not yet reported which blocks → Comwave Networks 160G South Pickering —
2013-02-12 385-228 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2013-02-12 385-315 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2013-02-12 385-321 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2013-02-12 404-998 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA GA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.