Recent prefix assignments

347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026

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
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
2017-02-14 507-686 0XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J OWATONNA MN
2017-02-14 559-293 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 FRESNO CA
2017-02-14 581-613 not yet reported which blocks → Bell Canada 8050 Quebec —
2017-02-14 647-915 not yet reported which blocks → Videotron Ltd. 787G Toronto —
2017-02-14 775-395 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NV 4805 RENO NV
2017-02-13 321-372 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H MELBOURNE FL
2017-02-13 336-568 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 NOWILKESBO NC
2017-02-13 470-373 0–9 XXXall 10 · 2 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 ATLANTA GA
2017-02-13 470-381 0–9 XXXall 10 · 2 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 ATLANTA GA
2017-02-13 540-924 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F BUCHANAN VA
2017-02-13 703-423 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - DC 7529 DULLES VA
2017-02-10 205-644 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 BIRMINGHAM AL
2017-02-10 205-645 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 BIRMINGHAM AL
2017-02-10 213-428 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 LSAN DA 01 CA
2017-02-10 518-571 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 0096 GLOVERSVL NY
2017-02-10 530-407 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ANDERSON CA
2017-02-10 574-999 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - IN 097D SOUTH BEND IN
2017-02-10 628-255 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC CNTRL CA
2017-02-10 657-353 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2017-02-10 707-613 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 EUREKA CA
2017-02-10 725-223 0–9 XXXall 10 · 6 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J LAS VEGAS NV
2017-02-10 909-738 0–9 XXXall 10 · 6 holders which blocks → METROPCS NETWORKS, LLC 899D ONTARIO CA
2017-02-09 217-888 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC 224C CHAMPAURBN IL
2017-02-09 470-379 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA NW GA
2017-02-09 470-601 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ADAIRSVL GA
2017-02-09 470-631 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA GA
2017-02-09 478-800 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - GA 067D DUBLIN GA
2017-02-09 567-777 0–9 XXXwhole prefix which blocks → ONVOY, LLC - OH 464C TOLEDO OH
2017-02-09 581-479 not yet reported which blocks → ISP Telecom Inc. 4727 Chibougamau —
2017-02-09 762-234 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J ATHENS GA
2017-02-09 873-472 not yet reported which blocks → ISP Telecom Inc. 4727 Ville-Marie —
2017-02-08 208-605 0–9 XXXall 10 · 5 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7865 BOISE ID
2017-02-08 343-618 not yet reported which blocks → Bell Canada 8051 Jockvale —
2017-02-08 343-619 not yet reported which blocks → Bell Canada 8051 Ottawa-Hull —
2017-02-08 365-701 not yet reported which blocks → Bell Canada 8051 Hamilton —
2017-02-08 365-702 not yet reported which blocks → Bell Canada 8051 Hamilton —
2017-02-08 365-703 not yet reported which blocks → Bell Canada 8051 Oshawa —
2017-02-08 365-704 not yet reported which blocks → Bell Canada 8051 Ajax-Pickering —
2017-02-08 365-706 not yet reported which blocks → Bell Canada 8051 Burlington —
2017-02-08 365-707 not yet reported which blocks → Bell Canada 8051 Oakville —
2017-02-08 365-708 not yet reported which blocks → Bell Canada 8051 Cooksville —
2017-02-08 365-709 not yet reported which blocks → Bell Canada 8051 Streetsville —
2017-02-08 365-710 not yet reported which blocks → Bell Canada 8051 Aurora —
2017-02-08 365-719 not yet reported which blocks → Bell Canada 8051 Thornhill —
2017-02-08 516-757 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NASSAUZN02 NY
2017-02-08 548-216 not yet reported which blocks → Bell Canada 8051 London —
2017-02-08 548-217 not yet reported which blocks → Bell Canada 8051 London —
2017-02-08 548-218 not yet reported which blocks → Bell Canada 8051 Galt —
2017-02-08 548-219 not yet reported which blocks → Bell Canada 8051 Kitchener-Waterloo —
2017-02-08 579-618 not yet reported which blocks → Bell Canada 8050 Chomedey —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.