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
2013-05-28 506-994 not yet reported which blocks → Fido Solutions Inc. 8820 Sussex —
2013-05-28 506-997 not yet reported which blocks → Fido Solutions Inc. 8820 Caraquet —
2013-05-28 682-262 0–9 XXXall 10 · 5 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K WEATHERFD TX
2013-05-28 902-996 not yet reported which blocks → Fido Solutions Inc. 8820 Kingston —
2013-05-28 937-813 0–9 XXXall 10 · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K DAYTON OH
2013-05-28 956-378 0–9 XXXall 10 · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K EDINBURG TX
2013-05-28 980-231 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E DAVIDSON NC
2013-05-28 980-247 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E DENVER NC
2013-05-28 980-267 0–9 XXXall 10 · 3 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 CHARLOTTE NC
2013-05-24 224-409 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2013-05-24 224-410 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 ALGONQUIN IL
2013-05-24 312-647 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2013-05-24 312-709 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2013-05-24 314-297 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - MO 993E ST LOUIS MO
2013-05-24 407-930 0–9 XXXall 10 · 3 holders which blocks → BHN IP ENABLED SERVICES, LLC 045L ORLANDO FL
2013-05-24 571-758 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 DULLES VA
2013-05-24 619-930 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 SNDG SNDG CA
2013-05-24 720-504 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - CO 078F DENVER CO
2013-05-24 774-423 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 FRAMINGHAM MA
2013-05-24 786-930 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MIAMI FL
2013-05-24 804-220 0–9 XXXall 10 · 5 holders which blocks → IDT AMERICA, CORP. - VA 231C REEDVILLE VA
2013-05-24 814-315 0–9 XXXall 10 · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K ERIE PA
2013-05-24 848-404 0XXX1XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BELMAR NJ
2013-05-24 859-878 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 COVINGTON KY
2013-05-24 872-218 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2013-05-24 872-303 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2013-05-24 872-305 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2013-05-24 904-930 0–9 XXXall 10 · 2 holders which blocks → POWERTEL JACKSONVILLE LICENSES, INC. 7472 JACKSONVL FL
2013-05-24 917-809 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN03 NY
2013-05-24 920-300 0XXX1XXX3XXX7XXX8XXX · 4 holders which blocks → EASTCOAST TELECOM, INC. 0914 CLEVELAND WI
2013-05-23 281-223 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J CLEVELAND TX
2013-05-23 307-429 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - WY 081F SHERIDAN WY
2013-05-23 314-319 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 ST LOUIS MO
2013-05-23 405-404 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CHANDLER OK
2013-05-23 613-412 not yet reported which blocks → Fibernetics Corporation 464D Bancroft —
2013-05-23 614-710 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F HILLIARD OH
2013-05-23 774-419 0–9 XXXall 10 · 7 holders which blocks → PAETEC ITEL, LLC 829J MIDDLEBORO MA
2013-05-23 786-617 0–9 XXXall 10 · 2 holders which blocks → NUSO, LLC 551G NORTH DADE FL
2013-05-23 864-559 0–9 XXXall 10 · 2 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 ANDERSON SC
2013-05-22 216-331 0–9 XXXall 10 · 2 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K CLEVELAND OH
2013-05-22 234-571 0–9 XXXall 10 · 2 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K AKRON OH
2013-05-22 513-873 0–9 XXXall 10 · 2 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K CINCINNATI OH
2013-05-22 567-413 0XXX1XXX4XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K BOWLNGGREN OH
2013-05-22 613-416 not yet reported which blocks → Fibernetics Corporation 464D Ottawa-Hull —
2013-05-22 613-681 not yet reported which blocks → Fibernetics Corporation 464D Trenton —
2013-05-22 613-713 not yet reported which blocks → Fibernetics Corporation 464D Kemptville —
2013-05-22 613-814 not yet reported which blocks → Fibernetics Corporation 464D Brighton —
2013-05-22 613-906 not yet reported which blocks → Fibernetics Corporation 464D Picton —
2013-05-22 613-908 not yet reported which blocks → Fibernetics Corporation 464D Manotick —
2013-05-22 613-964 not yet reported which blocks → Fibernetics Corporation 464D Carleton Place —

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.