NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
ONVOY, LLC - CA 21
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
2013-07-23 647-517 not yet reported which blocks → Bell Mobility 6574 Toronto —
2013-07-23 720-456 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 TELECOM OF COLORADO, LLC - CO 4574 DENVER CO
2013-07-23 737-346 0–9 XXXall 10 · 5 holders which blocks → AUSTIN BESTLINE COMPANY 7551 AUSTIN TX
2013-07-23 786-618 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 MIAMI FL
2013-07-22 650-445 0–9 XXXall 10 · 7 holders which blocks → T-MOBILE USA, INC. 6529 SAN MATEO CA
2013-07-22 858-260 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 LA JOLLA CA
2013-07-22 956-518 0–9 XXXall 10 · 4 holders which blocks → STPCS JOINT VENTURE, LLC 4290 BROWNSVL TX
2013-07-22 979-208 7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WARRENTON TX
2013-07-19 581-629 not yet reported which blocks → TELUS Quebec 2243 Levis —
2013-07-19 585-471 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 ROCHESTER NY
2013-07-19 709-295 not yet reported which blocks → Bragg Communications Inc. 4878 St. Mary's —
2013-07-19 709-326 not yet reported which blocks → Bragg Communications Inc. 4878 Trepassey —
2013-07-19 709-493 not yet reported which blocks → Bragg Communications Inc. 4878 Witless Bay —
2013-07-19 709-756 not yet reported which blocks → Bragg Communications Inc. 4878 Cape Broyle —
2013-07-19 709-849 not yet reported which blocks → Bragg Communications Inc. 4878 Bell Island —
2013-07-19 857-305 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BOSTON MA
2013-07-19 873-387 not yet reported which blocks → TELUS Quebec 2243 Trois-Rivieres —
2013-07-19 873-388 not yet reported which blocks → TELUS Quebec 2243 Mont-Laurier —
2013-07-18 206-305 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2013-07-18 224-412 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 NORTHBROOK IL
2013-07-18 321-307 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 COCOA FL
2013-07-18 587-540 not yet reported which blocks → Bell West Inc. 2933 Olds —
2013-07-18 904-510 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 JACKSONVL FL
2013-07-17 406-300 0–9 XXXall 10 · 6 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K KALISPELL MT
2013-07-17 515-642 0–9 XXXall 10 · 6 holders which blocks → MINBURN TELEPHONE COMPANY - IA 143H PERRY IA
2013-07-17 581-829 not yet reported which blocks → TELUS Quebec 8083 Baie-Comeau (Hauterive) —
2013-07-17 581-831 not yet reported which blocks → TELUS Quebec 8083 Saint-Georges-de-Beauce —
2013-07-17 587-340 not yet reported which blocks → Bell Mobility 6574 Edmonton —
2013-07-17 587-830 not yet reported which blocks → Bell Mobility 6574 Calgary —
2013-07-17 605-218 8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 6569 EAGLEBUTTE SD
2013-07-17 681-315 0–9 XXXall 10 · 5 holders which blocks → DIGITAL CONNECTIONS, INC. - WV 5201 PRKRSBGZN1 WV
2013-07-16 204-552 not yet reported which blocks → Westman Media Cooperative Ltd 120F Boissevain —
2013-07-16 204-554 not yet reported which blocks → Westman Media Cooperative Ltd 120F Killarney —
2013-07-16 240-614 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 WSNGTNZN10 MD
2013-07-16 317-954 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 INDIANAPLS IN
2013-07-16 571-253 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 WSNGTNZN17 VA
2013-07-16 667-206 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 TOWSON MD
2013-07-16 902-573 not yet reported which blocks → Bell Mobility Aliant 329A Country Harbour —
2013-07-16 902-716 not yet reported which blocks → Bell Mobility Aliant 329A Grand Narrows —
2013-07-16 978-553 not yet reported which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HUDSON MA
2013-07-15 323-714 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 MONTEBELLO CA
2013-07-15 647-518 not yet reported which blocks → Bell Mobility 6574 Toronto —
2013-07-15 709-325 not yet reported which blocks → Bell Mobility Aliant 329A St. John's —
2013-07-15 778-903 not yet reported which blocks → Bell Mobility 6574 Vancouver —
2013-07-15 819-452 not yet reported which blocks → Bell Mobility 6574 Sherbrooke —
2013-07-15 857-267 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J MILTON MA
2013-07-12 204-202 not yet reported which blocks → Fibernetics Corporation 464D Winnipeg —
2013-07-12 442-226 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 BRAWLEY CA
2013-07-12 720-391 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 DENVER CO
2013-07-12 778-243 not yet reported which blocks → Bell West Inc. 2933 Aldergrove —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.