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
2013-03-28 819-954 not yet reported which blocks → ISP Telecom Inc. 4727 Amos —
2013-03-27 202-909 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 WSHNGTNZN1 DC
2013-03-27 469-518 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 DALLAS TX
2013-03-27 469-605 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 FRISCO TX
2013-03-27 512-270 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 AUSTIN TX
2013-03-27 567-418 0–9 XXXall 10 · 2 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J LIMA OH
2013-03-27 707-379 0–9 XXXall 10 · 7 holders which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F VALLEYFORD CA
2013-03-27 832-920 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 LANGHAMCRK TX
2013-03-27 832-941 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7239 HOUSTON TX
2013-03-27 917-708 0–9 XXXall 10 · 5 holders which blocks → CSC VOICE, LLC 612K NWYRCYZN04 NY
2013-03-27 929-231 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN10 NY
2013-03-27 929-236 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF NEW YORK, LLC - NY 155E NWYRCYZN07 NY
2013-03-27 929-244 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 NWYRCYZN10 NY
2013-03-27 929-252 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 NWYRCYZN06 NY
2013-03-27 951-399 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K ELSINORE CA
2013-03-26 253-204 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - WA 483E AUBURN WA
2013-03-26 470-443 0–9 XXXall 10 · 2 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA GA
2013-03-26 575-265 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NM 5470 CLOVIS NM
2013-03-26 575-449 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NM 5470 LAS CRUCES NM
2013-03-26 609-904 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF NEW JERSEY, LLC - NJ 264F SOMERS PT NJ
2013-03-26 734-431 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 WAYNE MI
2013-03-26 856-440 0–9 XXXall 10 · 7 holders which blocks → PEERLESS NETWORK OF NEW JERSEY, LLC - NJ 264F MILLVILLE NJ
2013-03-26 913-313 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KANSASCITY KS
2013-03-25 415-767 0–9 XXXall 10 · 6 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7174 SNFC CNTRL CA
2013-03-25 442-244 0–9 XXXall 10 · 8 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K OCSD CRLS CA
2013-03-25 682-219 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ARLINGTON TX
2013-03-25 682-240 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 ARLINGTON TX
2013-03-25 707-306 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F ANNAPOLIS CA
2013-03-25 760-706 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F WRWD PHLN CA
2013-03-25 848-217 0–9 XXXall 10 · 9 holders which blocks → PEERLESS NETWORK OF NEW JERSEY, LLC - NJ 264F ASBURYPARK NJ
2013-03-25 909-324 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F RUNNINGSPG CA
2013-03-25 914-349 0–9 XXXall 10 · 3 holders which blocks → CSC VOICE, LLC 612K WSCHSTZN01 NY
2013-03-25 916-347 0–9 XXXall 10 · 7 holders which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F FAIR OAKS CA
2013-03-25 917-801 0–9 XXXall 10 · 3 holders which blocks → CSC VOICE, LLC 612K NWYRCYZN03 NY
2013-03-25 925-239 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F WALNUT CRK CA
2013-03-25 929-228 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN03 NY
2013-03-25 929-229 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF NEW YORK, LLC - NY 155E NWYRCYZN08 NY
2013-03-25 940-218 0–9 XXXall 10 · 5 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K DENTON TX
2013-03-25 951-366 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LAKEVIEWNU CA
2013-03-22 226-247 not yet reported which blocks → TELUS Integrated Communications 2782 McGregor —
2013-03-22 226-248 not yet reported which blocks → TELUS Integrated Communications 2782 Wheatley —
2013-03-22 226-249 not yet reported which blocks → TELUS Integrated Communications 2782 Thamesville —
2013-03-22 365-560 not yet reported which blocks → Comwave Networks 160G Beeton —
2013-03-22 415-549 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 SNFC CNTRL CA
2013-03-22 506-799 not yet reported which blocks → Iristel Inc. 154E Saint John —
2013-03-22 639-571 not yet reported which blocks → SaskTel Mobility 9868 Regina —
2013-03-22 812-914 0–9 XXXall 10 · 7 holders which blocks → PAETEC ITEL, LLC 829J NEW ALBANY IN
2013-03-22 909-929 0–9 XXXall 10 · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K CLAREMONT CA
2013-03-22 913-304 0–9 XXXall 10 · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 KANSASCITY KS
2013-03-22 913-305 0–9 XXXall 10 · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 KANSASCITY KS

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.