NumberResearch Membership · Data 09/24/2026

Recent prefix assignments

358 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/24/2026

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
2012-02-21 864-308 0–9 XXXall 10 · 5 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 SPARTANBG SC
2012-02-21 907-810 7XXX which blocks → GCI COMMUNICATION CORP. DBA GENERAL COMMUNICATION 6872 DELTA JCT AK
2012-02-20 631-496 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 SELDEN NY
2012-02-20 916-426 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SCRM NORTH CA
2012-02-17 262-648 0–9 XXXwhole prefix which blocks → ONVOY, LLC - WI 225C MILWAUKZN2 WI
2012-02-17 339-201 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 WEYMOUTH MA
2012-02-17 469-205 0–9 XXXwhole prefix which blocks → ONVOY, LLC - TX 903C DLFTWTARPT TX
2012-02-17 470-222 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA NE GA
2012-02-17 470-289 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA NE GA
2012-02-17 470-328 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA NE GA
2012-02-17 470-336 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA NE GA
2012-02-17 470-673 0–9 XXXwhole prefix which blocks → ONVOY, LLC - GA 067D ATLANTA GA
2012-02-17 480-439 0–9 XXXwhole prefix which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2012-02-17 505-354 0XXX1XXX4XXX5XXX8XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NM 5470 SHIPROCK NM
2012-02-17 505-422 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CROWNPOINT NM
2012-02-17 512-256 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F KYLE TX
2012-02-17 567-218 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 TOLEDO OH
2012-02-17 619-720 0–9 XXXwhole prefix which blocks → ONVOY, LLC - CA 649C SNDG SNDG CA
2012-02-17 646-412 0–9 XXXall 10 · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 NWYRCYZN01 NY
2012-02-17 702-718 0–9 XXXwhole prefix which blocks → ONVOY, LLC - NV 029F LAS VEGAS NV
2012-02-17 720-623 0–9 XXXwhole prefix which blocks → ONVOY, LLC - CO 026D DENVER CO
2012-02-17 775-405 0–9 XXXall 10 · 8 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NV 4805 ELY NV
2012-02-17 941-254 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 BRADENTON FL
2012-02-16 407-337 0–9 XXXwhole prefix which blocks → ONVOY, LLC - FL 937C ORLANDO FL
2012-02-16 408-508 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CAMPBELL CA
2012-02-16 408-560 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E LOS GATOS CA
2012-02-16 480-426 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2012-02-16 575-252 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - NM 206F ANGEL FIRE NM
2012-02-16 612-502 0–9 XXXwhole prefix which blocks → ONVOY, LLC - MN 184D TWINCITIES MN
2012-02-16 786-480 0–9 XXXwhole prefix which blocks → ONVOY, LLC - FL 937C NORTH DADE FL
2012-02-16 813-430 0–9 XXXwhole prefix which blocks → ONVOY, LLC - FL 937C TAMPAWST FL
2012-02-16 832-650 0–9 XXXwhole prefix which blocks → ONVOY, LLC - TX 903C HOUSTON TX
2012-02-16 857-219 0–9 XXXwhole prefix which blocks → ONVOY, LLC - MA 892D NEWTON MA
2012-02-16 915-777 0–9 XXXall 10 · 3 holders which blocks → INTRADO COMMUNICATIONS, LLC 9558 EL PASO TX
2012-02-16 971-260 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F CLATSKANIE OR
2012-02-16 971-512 0–9 XXXwhole prefix which blocks → ONVOY, LLC - OR 750E PORTLAND OR
2012-02-15 201-879 0–9 XXXall 10 · 6 holders which blocks → CABLEVISION LIGHTPATH, INC. - NJ 4948 RIDGEWOOD NJ
2012-02-15 219-239 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 GARY IN
2012-02-15 234-203 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CANTON OH
2012-02-15 306-513 not yet reported which blocks → SaskTel Mobility 9868 Moose Jaw —
2012-02-15 306-515 not yet reported which blocks → SaskTel Mobility 9868 Regina —
2012-02-15 352-530 0–9 XXXall 10 · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 LEESBURG FL
2012-02-15 502-709 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KY 6500 LOUISVILLE KY
2012-02-15 587-390 not yet reported which blocks → Shaw Telecom Inc. 497E Calgary —
2012-02-15 616-259 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 GRAND RPDS MI
2012-02-15 647-873 not yet reported which blocks → Fibernetics Corporation 464D Toronto —
2012-02-15 734-343 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 LIVONIA MI
2012-02-15 775-870 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NV 6458 RENO NV
2012-02-15 832-614 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 HSTNSUBURB TX
2012-02-15 859-490 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KY 6500 LEXINGTON KY

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/24/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.