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
2013-06-03 234-805 0–9 XXXall 10 · 7 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K LOWELLVL OH
2013-06-03 234-806 0–9 XXXall 10 · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K WARREN OH
2013-06-03 234-808 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K NORTHFIELD OH
2013-06-03 510-680 0–9 XXXall 10 · 7 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J RICHMOND CA
2013-06-03 567-805 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K NORWALK OH
2013-06-03 740-914 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K MARION OH
2013-06-03 740-915 0–9 XXXall 10 · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K NEWARK OH
2013-06-03 872-239 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2013-06-03 929-241 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN03 NY
2013-06-03 929-245 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN07 NY
2013-06-03 929-272 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN06 NY
2013-06-03 937-805 0XXX4XXX9XXX · 2 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K WILMINGTON OH
2013-06-03 937-808 0XXX4XXX5XXX7XXX · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K GREENVILLE OH
2013-06-03 949-396 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 IRVINE CA
2013-05-31 208-400 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - ID 6565 OROFINO ID
2013-05-31 226-275 not yet reported which blocks → Gosfield North Communication Co-operative Ltd. 117H Woodslee —
2013-05-31 226-375 not yet reported which blocks → Gosfield North Communication Co-operative Ltd. 117H Pleasant Park —
2013-05-31 337-221 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J DE RIDDER LA
2013-05-31 424-322 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNMN SNMN CA
2013-05-31 431-432 not yet reported which blocks → RFNow Inc. 346G Brandon —
2013-05-31 431-433 not yet reported which blocks → RFNow Inc. 346G Winnipeg —
2013-05-31 431-645 not yet reported which blocks → RFNow Inc. 346G Virden —
2013-05-31 484-447 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 POTTSTOWN PA
2013-05-31 512-621 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2013-05-31 682-226 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 ARLINGTON TX
2013-05-31 702-623 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - NV 075F LAS VEGAS NV
2013-05-31 860-850 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - CT 199F NIANTIC CT
2013-05-31 878-202 0–9 XXXall 10 · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K SHARON PA
2013-05-30 207-806 0–9 XXXall 10 · 7 holders which blocks → FREEDOM RING COMMUNICATIONS, LLC - ME 512F SANFORD ME
2013-05-30 210-719 0–9 XXXwhole prefix which blocks → METROPCS, INC. 5562 SANANTONIO TX
2013-05-30 954-906 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E CORAL SPG FL
2013-05-29 202-910 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 WSHNGTNZN1 DC
2013-05-29 240-615 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 WSHNGTNZN4 MD
2013-05-29 313-214 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN5 MI
2013-05-29 313-326 0–9 XXXall 10 · 6 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN5 MI
2013-05-29 470-592 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - GA 983E BARNESVL GA
2013-05-29 731-500 0XXX1XXX2XXX4XXX5XXX8XXX · 5 holders which blocks → TENNESSEE TEL. CO. 0575 PARSONS TN
2013-05-29 763-310 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MN 5256 CAMBRIDGE MN
2013-05-29 956-413 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 LAREDO TX
2013-05-28 202-831 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 551G WSHNGTNZN1 DC
2013-05-28 210-760 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 SANANTONIO TX
2013-05-28 219-315 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 E CHICAGO IN
2013-05-28 219-316 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 E CHICAGO IN
2013-05-28 302-502 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J WILMINGTON DE
2013-05-28 313-264 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN2 MI
2013-05-28 313-327 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN3 MI
2013-05-28 313-367 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN4 MI
2013-05-28 313-374 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN6 MI
2013-05-28 505-278 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NM 5470 FARMINGTON NM
2013-05-28 506-991 not yet reported which blocks → Fido Solutions Inc. 8820 Woodstock —

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.