NumberResearch Membership · Data 09/21/2026

Recent prefix assignments

338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/21/2026

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. 38
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
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
2010-10-14 347-699 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN07 NY
2010-10-14 347-708 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN03 NY
2010-10-14 406-505 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CONRAD MT
2010-10-14 432-456 0–9 XXXwhole prefix which blocks → SOUTHWESTERN BELL 9533 ODESSA TX
2010-10-14 484-725 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ALLENTOWN PA
2010-10-14 504-346 0XXX1XXX3XXX6XXX8XXX9XXX · 2 holders which blocks → VOICESTREAM GSM I, LLC 150C KENNER LA
2010-10-14 575-263 0–9 XXXall 10 · 4 holders which blocks → VALOR TELECOM TX,LP-NM #1 DBA WINDSTREAM COMM SW 1164 HOBBS NM
2010-10-14 585-308 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E LE ROY NY
2010-10-14 720-686 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 DENVER CO
2010-10-14 757-995 0–9 XXXall 10 · 4 holders which blocks → PAETEC ITEL, LLC 829J NRFOLKZON2 VA
2010-10-13 224-239 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 ELGIN IL
2010-10-13 778-349 not yet reported which blocks → TELUS Mobility 8301 Prince George —
2010-10-13 778-679 not yet reported which blocks → TELUS Mobility 8301 Victoria —
2010-10-13 786-441 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - FL 8664 MIAMI FL
2010-10-13 786-600 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E MIAMI FL
2010-10-13 914-246 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E WSCHSTZN03 NY
2010-10-13 956-699 not yet reported which blocks → VTX COMMUNICATIONS, LLC 776A RAYMONDVL TX
2010-10-12 204-891 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Winnipeg —
2010-10-12 219-225 0–9 XXXall 10 · 6 holders which blocks → PAETEC ITEL, LLC 829J LOWELL IN
2010-10-12 406-269 none assigned yet which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ST REGIS MT
2010-10-12 406-515 5XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SUPERIOR MT
2010-10-12 504-300 0–9 XXXall 10 · 3 holders which blocks → VOICESTREAM GSM I, LLC 150C NEWORLEANS LA
2010-10-12 647-622 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Toronto —
2010-10-12 647-623 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Toronto —
2010-10-12 647-624 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Toronto —
2010-10-12 647-625 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Toronto —
2010-10-12 647-626 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Toronto —
2010-10-12 647-627 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Toronto —
2010-10-12 647-629 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Toronto —
2010-10-12 845-219 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NEWBURGH NY
2010-10-12 939-274 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2010-10-12 939-275 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2010-10-12 939-276 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2010-10-12 939-278 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2010-10-12 971-310 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - OR 7531 BEAVERTON OR
2010-10-11 231-412 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - MI 991E HARBOR SPG MI
2010-10-11 302-300 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DE 6393 WILMINGTON DE
2010-10-11 323-391 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 14 CA
2010-10-11 347-639 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 NWYRCYZN08 NY
2010-10-11 347-650 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN12 NY
2010-10-11 347-656 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN08 NY
2010-10-11 347-662 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN07 NY
2010-10-11 347-667 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN09 NY
2010-10-11 424-257 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E REDONDO CA
2010-10-11 810-294 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - MI 991E PORT HURON MI
2010-10-11 970-317 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 DURANGO CO
2010-10-11 971-313 0–9 XXXall 10 · 3 holders which blocks → QWEST CORPORATION 9638 PORTLAND OR
2010-10-08 226-229 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Chatham —
2010-10-08 226-988 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Kitchener-Waterloo —
2010-10-08 256-440 0XXX1XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 FYFFE AL

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.