NumberResearch Membership · Data 09/25/2026

Recent prefix assignments

337 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 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - IL 25
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 12
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
2013-04-10 541-903 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 PRINEVILLE OR
2013-04-10 579-919 not yet reported which blocks → Comwave Networks 160G Pont-Viau —
2013-04-10 579-929 not yet reported which blocks → Comwave Networks 160G Chomedey —
2013-04-10 579-939 not yet reported which blocks → Comwave Networks 160G Laval-Est —
2013-04-10 579-969 not yet reported which blocks → Comwave Networks 160G Ste-Rose —
2013-04-10 579-989 not yet reported which blocks → Comwave Networks 160G Laval-Ouest —
2013-04-10 586-200 0–9 XXXall 10 · 7 holders which blocks → COMCAST IP PHONE, LLC 318J ROSEVILLE MI
2013-04-10 587-334 not yet reported which blocks → Bell Mobility 6574 Edmonton —
2013-04-10 587-768 not yet reported which blocks → Distributel 081E Wetaskiwin —
2013-04-10 587-769 not yet reported which blocks → Distributel 081E Camrose —
2013-04-10 587-770 not yet reported which blocks → Distributel 081E Medicine Hat —
2013-04-10 587-771 not yet reported which blocks → Distributel 081E Grande Prairie —
2013-04-10 682-301 0–9 XXXall 10 · 6 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K GLENDALE TX
2013-04-10 708-719 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E MOKENA IL
2013-04-10 708-803 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E OAK FOR SO IL
2013-04-10 779-228 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E MAZON IL
2013-04-10 779-994 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E CRYSTAL LK IL
2013-04-10 862-803 0–9 XXXall 10 · 6 holders which blocks → CSC VOICE, LLC 612K HOPATCONG NJ
2013-04-10 970-289 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF COLORADO, LLC - CO 278F BRUSH CO
2013-04-10 970-528 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF COLORADO, LLC - CO 278F BERTHOUD CO
2013-04-10 970-591 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF COLORADO, LLC - CO 278F ESTES PARK CO
2013-04-10 970-661 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF COLORADO, LLC - CO 278F BAYFIELD CO
2013-04-10 970-713 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → PEERLESS NETWORK OF COLORADO, LLC - CO 278F CRESTEDBTE CO
2013-04-10 970-718 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF COLORADO, LLC - CO 278F BASALT CO
2013-04-09 226-616 not yet reported which blocks → Comwave Networks 160G Galt —
2013-04-09 226-632 not yet reported which blocks → Comwave Networks 160G Breslau —
2013-04-09 226-642 not yet reported which blocks → Comwave Networks 160G Ayr —
2013-04-09 226-686 not yet reported which blocks → Comwave Networks 160G Kitchener-Waterloo —
2013-04-09 226-696 not yet reported which blocks → Comwave Networks 160G Hespeler —
2013-04-09 240-503 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF MARYLAND, LLC 568G TOMPKINSVL MD
2013-04-09 267-928 0–9 XXXall 10 · 2 holders which blocks → COMCAST IP PHONE, LLC 318J PHLDLPHZN1 PA
2013-04-09 530-338 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E REDDING CA
2013-04-09 579-266 not yet reported which blocks → Comwave Networks 160G St-Lambert —
2013-04-09 579-859 not yet reported which blocks → Comwave Networks 160G Marieville —
2013-04-09 579-869 not yet reported which blocks → Comwave Networks 160G Laprairie —
2013-04-09 579-949 not yet reported which blocks → Comwave Networks 160G Beloeil —
2013-04-09 614-721 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F COLUMBUS OH
2013-04-09 631-250 0–9 XXXall 10 · 5 holders which blocks → CSC VOICE, LLC 612K ST JAMES NY
2013-04-09 651-412 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF MINNESOTA, LLC - MN 107F WABASHA MN
2013-04-09 667-307 0–9 XXXall 10 · 7 holders which blocks → PEERLESS NETWORK OF MARYLAND, LLC 568G CROFTON MD
2013-04-09 708-864 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E TINLEYPARK IL
2013-04-09 754-307 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J POMPANOBCH FL
2013-04-09 778-302 not yet reported which blocks → Videotron Ltd. 787G Vancouver —
2013-04-09 779-213 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E OGLESBY IL
2013-04-09 779-215 0XXX which blocks → IP HORIZON LLC 515J TONICA IL
2013-04-09 779-216 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E FRANKFORT IL
2013-04-09 779-218 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E WATSEKA IL
2013-04-08 269-222 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - MI 991E WATERVLIET MI
2013-04-08 404-670 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA GA
2013-04-08 405-696 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F EDMOND OK

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.