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
2013-05-22 613-974 not yet reported which blocks → Fibernetics Corporation 464D Kanata-Stittsville —
2013-05-22 702-904 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NV 6458 LAS VEGAS NV
2013-05-22 719-453 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 COLORDOSPG CO
2013-05-22 740-771 0–9 XXXall 10 · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K CHILLICOTH OH
2013-05-22 918-414 not yet reported which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F TAHLEQUAH OK
2013-05-22 970-342 0–9 XXXall 10 · 4 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 3467 LOVELAND CO
2013-05-21 317-909 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 INDIANAPLS IN
2013-05-21 408-831 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNJS WEST CA
2013-05-21 413-402 0XXX1XXX2XXX3XXX4XXX6XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E SHEFFIELD MA
2013-05-21 646-681 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 NWYRCYZN01 NY
2013-05-21 702-903 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - NV 587C LAUGHLIN NV
2013-05-21 705-317 not yet reported which blocks → Comwave Networks 160G Udora —
2013-05-21 705-318 not yet reported which blocks → Comwave Networks 160G Pefferlaw —
2013-05-21 713-352 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F APOLLO TX
2013-05-21 902-949 not yet reported which blocks → Bell Mobility Aliant 329A Halifax —
2013-05-20 210-812 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 SANANTONIO TX
2013-05-20 210-816 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F SANANTONIO TX
2013-05-20 210-910 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F SANANTONIO TX
2013-05-20 252-214 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 GREENVILLE NC
2013-05-20 314-202 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 ST LOUIS MO
2013-05-20 404-528 0–9 XXXall 10 · 2 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA GA
2013-05-20 404-940 0–9 XXXwhole prefix which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA GA
2013-05-20 469-607 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F DALLAS TX
2013-05-20 713-322 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F HOUSTON TX
2013-05-20 810-662 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - MI 991E PORT HURON MI
2013-05-20 956-415 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F LAREDO TX
2013-05-20 971-308 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F CANNON BCH OR
2013-05-20 971-320 0–9 XXXall 10 · 9 holders which blocks → T-MOBILE USA, INC. 6529 SEASIDE OR
2013-05-20 980-444 0–9 XXXall 10 · 6 holders which blocks → SOUTH CAROLINA NET, INC. - NC 511C MOORESVL NC
2013-05-20 985-302 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - LA 153F COVINGTON LA
2013-05-19 513-802 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CINCINNATI OH
2013-05-17 267-355 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHPHSBZN43 PA
2013-05-17 267-400 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHPHSBZN43 PA
2013-05-17 267-922 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHPHSBZN43 PA
2013-05-17 267-969 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHLDLPHZN2 PA
2013-05-17 289-594 not yet reported which blocks → Comwave Networks 160G Palgrave —
2013-05-17 289-851 not yet reported which blocks → Bell Canada 8051 Milton —
2013-05-17 313-472 0–9 XXXall 10 · 3 holders which blocks → AT&T ENTERPRISES, LLC 516C DETROITZN5 MI
2013-05-17 613-554 not yet reported which blocks → Fibernetics Corporation 464D Belleville —
2013-05-17 613-666 not yet reported which blocks → Fibernetics Corporation 464D Madoc —
2013-05-17 804-208 0XXX2XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - VA 4644 BEAVERDAM VA
2013-05-17 816-908 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7594 KANSASCITY MO
2013-05-17 864-520 0–9 XXXall 10 · 4 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K GREENVILLE SC
2013-05-16 385-220 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - UT 871E FARMINGTON UT
2013-05-16 424-332 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 BEVERLYHLS CA
2013-05-16 435-218 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - UT 871E ST GEORGE UT
2013-05-16 510-362 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 HAYWARD CA
2013-05-16 567-309 0–9 XXXall 10 · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J MANSFIELD OH
2013-05-16 571-551 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WSNGTNZN08 VA
2013-05-16 618-607 0–9 XXXall 10 · 6 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J O FALLON IL

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.