NumberResearch Membership · Data 09/29/2026

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
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
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
2016-07-07 639-502 not yet reported which blocks → Distributel 081E Dinsmore —
2016-07-07 639-503 not yet reported which blocks → Distributel 081E Duck Lake —
2016-07-07 639-504 not yet reported which blocks → Distributel 081E Dundurn —
2016-07-07 639-505 not yet reported which blocks → Distributel 081E Hafford —
2016-07-07 639-506 not yet reported which blocks → Distributel 081E Hague —
2016-07-07 639-507 not yet reported which blocks → Distributel 081E Hanley —
2016-07-07 639-508 not yet reported which blocks → Distributel 081E Hepburn —
2016-07-07 639-509 not yet reported which blocks → Distributel 081E Langham —
2016-07-07 639-510 not yet reported which blocks → Distributel 081E Lanigan —
2016-07-07 639-512 not yet reported which blocks → Distributel 081E Lucky Lake —
2016-07-07 639-513 not yet reported which blocks → Distributel 081E Meacham —
2016-07-07 639-514 not yet reported which blocks → Distributel 081E Osler —
2016-07-07 639-515 not yet reported which blocks → Distributel 081E Outlook —
2016-07-07 639-516 not yet reported which blocks → Distributel 081E Perdue —
2016-07-07 639-517 not yet reported which blocks → Distributel 081E Prudhomme —
2016-07-07 639-518 not yet reported which blocks → Distributel 081E Radisson —
2016-07-07 639-519 not yet reported which blocks → Distributel 081E Rosthern —
2016-07-07 639-520 not yet reported which blocks → Distributel 081E Vonda —
2016-07-07 639-521 not yet reported which blocks → Distributel 081E Wakaw —
2016-07-07 639-522 not yet reported which blocks → Distributel 081E Waldheim —
2016-07-07 639-523 not yet reported which blocks → Distributel 081E Watrous —
2016-07-07 782-463 not yet reported which blocks → Bragg Communications Inc. 4878 Lockeport —
2016-07-07 813-296 0–9 XXXall 10 · 6 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 TAMPASTH FL
2016-07-07 865-770 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 KNOXVILLE TN
2016-07-06 346-241 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C HOUSTON TX
2016-07-06 432-232 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ODESSA TX
2016-07-06 458-213 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OR 750E WALLOWA OR
2016-07-06 469-356 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC - TX 903C NEVADA TX
2016-07-06 480-493 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2016-07-06 520-330 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 TUCSON AZ
2016-07-06 579-281 not yet reported which blocks → TELUS Quebec 2243 St-Jerome —
2016-07-06 579-282 not yet reported which blocks → TELUS Quebec 2243 St-Calixte-de-Kilkenny —
2016-07-06 579-283 not yet reported which blocks → TELUS Quebec 2243 St-Lin —
2016-07-06 579-284 not yet reported which blocks → TELUS Quebec 2243 St-Hippolyte —
2016-07-06 579-285 not yet reported which blocks → TELUS Quebec 2243 St-Vincent-de-Paul —
2016-07-06 646-815 0–9 XXXwhole prefix which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 NWYRCYZN01 NY
2016-07-06 646-816 0–9 XXXwhole prefix which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 NWYRCYZN01 NY
2016-07-06 828-529 2XXX3XXX9XXX · 3 holders which blocks → WINDSTREAM NORTH CAROLINA, INC. 0476 TRYON NC
2016-07-06 936-265 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - TX 903C SHIRO TX
2016-07-06 980-825 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 HARRISBURG NC
2016-07-05 325-221 0–9 XXXall 10 · 3 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J BRONTE TX
2016-07-05 813-328 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 TAMPAWST FL
2016-07-01 240-592 0–9 XXXwhole prefix which blocks → VERIZON MARYLAND, INC. 9212 WSNG236Z13 MD
2016-07-01 475-217 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2016-07-01 475-229 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2016-07-01 559-214 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 FRESNO CA
2016-07-01 628-204 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 NICASIO CA
2016-07-01 628-241 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 SNFC JUNPR CA
2016-07-01 628-252 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 CORTEMADRA CA
2016-07-01 951-409 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E ELSINORE CA

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.