NumberResearch Membership · Data 09/22/2026

Recent prefix assignments

354 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/22/2026

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. 39
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 20
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
2011-03-16 708-238 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
2011-03-16 716-261 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC- NY 384C BUFFALO NY
2011-03-16 769-524 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 TELECOM OF MISSISSIPPI, LLC - MS 220C JACKSON MS
2011-03-16 770-400 0–9 XXXall 10 · 4 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 NEWNAN GA
2011-03-16 779-500 0XXX4XXX6XXX9XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 ROCKFORD IL
2011-03-16 902-204 not yet reported which blocks → Bragg Communications Inc. 421G Chester —
2011-03-16 902-337 not yet reported which blocks → Bragg Communications Inc. 421G Musquodoboit Harbour —
2011-03-16 902-340 not yet reported which blocks → Bragg Communications Inc. 421G Digby —
2011-03-16 902-343 not yet reported which blocks → Bragg Communications Inc. 421G Liverpool —
2011-03-16 902-349 not yet reported which blocks → Bragg Communications Inc. 421G Middleton —
2011-03-16 902-385 not yet reported which blocks → Bragg Communications Inc. 421G Kentville —
2011-03-16 902-514 not yet reported which blocks → Bragg Communications Inc. 421G Bridgewater —
2011-03-16 902-581 not yet reported which blocks → Bragg Communications Inc. 421G Barrington —
2011-03-16 910-852 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 LAURINBURG NC
2011-03-16 913-200 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 KANSASCITY KS
2011-03-16 919-213 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 TELECOM OF NORTH CAROLINA, LP - NC 7555 DURHAM NC
2011-03-16 939-413 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2011-03-16 939-414 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2011-03-16 939-415 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2011-03-16 939-416 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2011-03-16 939-417 0–9 XXXall 10 · 2 holders which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2011-03-16 939-418 0–9 XXXwhole prefix which blocks → PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2011-03-16 971-295 0–9 XXXall 10 · 2 holders which blocks → PAETEC ITEL, LLC 829J PORTLAND OR
2011-03-16 980-255 0–9 XXXall 10 · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C CONCORD NC
2011-03-15 450-391 not yet reported which blocks → ISP Telecom Inc. 4727 Ste-Marthe —
2011-03-15 478-443 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 LKSINCLAIR GA
2011-03-15 587-778 not yet reported which blocks → Videotron Ltd. 383F Edmonton —
2011-03-15 587-891 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Calgary —
2011-03-15 587-892 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Calgary —
2011-03-15 587-893 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Calgary —
2011-03-15 587-894 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Calgary —
2011-03-15 587-895 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Calgary —
2011-03-15 605-744 0XXX1XXX4XXX6XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LENNOX SD
2011-03-15 613-413 not yet reported which blocks → Videotron Ltd. 383F Ottawa-Hull —
2011-03-15 647-737 not yet reported which blocks → Distributel 082E Toronto —
2011-03-15 812-996 0–9 XXXwhole prefix which blocks → FULLNET ADVANCED COMMUNICATIONS, INC. - IN 068F JASPER IN
2011-03-15 859-414 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 COVINGTON KY
2011-03-15 902-389 not yet reported which blocks → Bragg Communications Inc. 421G Aylesford —
2011-03-15 902-714 not yet reported which blocks → Bragg Communications Inc. 421G Antigonish —
2011-03-15 916-895 0–9 XXXall 10 · 4 holders which blocks → FRONTIER COMMUNICATIONS OF AMERICA, INC. - CA 006E ELK GROVE CA
2011-03-14 401-500 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - RI 6389 PROVIDENCE RI
2011-03-14 484-721 0–9 XXXwhole prefix which blocks → METROPCS, INC. 5562 READING PA
2011-03-14 720-369 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 DENVER CO
2011-03-14 872-600 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2011-03-14 956-529 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MISSION TX
2011-03-14 970-658 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CO 6118 FT COLLINS CO
2011-03-13 440-961 0–9 XXXall 10 · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K AVON LAKE OH
2011-03-11 347-904 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN03 NY
2011-03-11 401-332 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 PROVIDENCE RI
2011-03-11 504-317 0–9 XXXall 10 · 3 holders which blocks → VOICESTREAM GSM I, LLC 150C KENNER LA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.