NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

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

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
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 27
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
New assignments by month Oct 2026 Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2018-09-21 458-228 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → PEERLESS NETWORK OF OREGON, LLC - OR 157F SUMPTER OR
2018-09-21 469-558 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 ENNIS TX
2018-09-21 475-701 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F NAUGATUCK CT
2018-09-21 501-300 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - AR 348F BRADFORD AR
2018-09-21 501-506 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - AR 348F GRIFFITHVL AR
2018-09-21 501-600 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - AR 348F PLEASANTPL AR
2018-09-21 502-818 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - KY 987E LEBANONJCT KY
2018-09-21 520-346 0–9 XXXall 10 · 3 holders which blocks → PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F BISBEE AZ
2018-09-21 539-224 0XXX1XXX2XXX3XXX4XXX5XXX6XXX · 2 holders which blocks → ONVOY, LLC - OK 409F WMAYSVILLE OK
2018-09-21 574-564 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - IN 097D ELKHART IN
2018-09-21 612-403 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 TWINCITIES MN
2018-09-21 616-483 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - MI 991E DUTTON MI
2018-09-21 704-703 0–9 XXXwhole prefix which blocks → ONVOY, LLC - NC 638E LILESVILLE NC
2018-09-21 774-378 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → TC SYSTEMS, INC. 7135 WRENTHAM MA
2018-09-21 870-800 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - AR 348F ROSSTON AR
2018-09-21 989-290 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 GRAYLING MI
2018-09-20 206-665 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 SEATTLE WA
2018-09-20 309-610 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC 224C FORESTCITY IL
2018-09-20 309-640 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC 224C HAVANA IL
2018-09-20 313-257 0–9 XXXwhole prefix which blocks → METROPCS, INC. 5562 DETROITZN3 MI
2018-09-20 343-471 not yet reported which blocks → ISP Telecom Inc. 4727 Tweed —
2018-09-20 475-252 0–9 XXXall 10 · 4 holders which blocks → CABLEVISION LIGHTPATH, INC. - CT 4950 BYRAM CT
2018-09-20 510-930 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F OKLD FRTVL CA
2018-09-20 561-388 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 WPALMBEACH FL
2018-09-20 561-418 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 BOCA RATON FL
2018-09-20 581-856 not yet reported which blocks → Videotron Ltd. 8306 Sainte-Agathe-de-Lotbiniere —
2018-09-20 581-857 not yet reported which blocks → Videotron Ltd. 8306 Frampton —
2018-09-20 581-858 not yet reported which blocks → Videotron Ltd. 8306 Saint-Joseph-de-Beauce —
2018-09-20 646-978 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN01 NY
2018-09-20 720-730 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CO 026D DENVER CO
2018-09-20 803-868 0–9 XXXall 10 · 4 holders which blocks → PALMETTO TELEPHONE COMMUNICATIONS, LLC - SC 154C BARNWELL SC
2018-09-20 813-522 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 TAMPANTH FL
2018-09-20 825-993 not yet reported which blocks → TELUS Mobility 8301 Edmonton —
2018-09-20 843-905 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - SC 548E PAMPLICO SC
2018-09-20 850-407 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - FL 937C PENSACOLA FL
2018-09-20 856-390 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - NJ 118F WOODSTOWN NJ
2018-09-20 857-349 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E WINTHROP MA
2018-09-20 929-491 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN06 NY
2018-09-19 202-919 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - DC 850D WSHNGTNZN1 DC
2018-09-19 251-351 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AL 604E BEATRICE AL
2018-09-19 251-451 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AL 604E GOSPORT AL
2018-09-19 251-551 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AL 604E PINE APPLE AL
2018-09-19 267-854 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHLDLPHZN2 PA
2018-09-19 438-360 not yet reported which blocks → Bell Mobility 6574 Montreal —
2018-09-19 438-441 not yet reported which blocks → Bell Mobility 6574 Montreal —
2018-09-19 479-339 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AR 348F BOLES AR
2018-09-19 479-341 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AR 348F CENTERTON AR
2018-09-19 479-342 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AR 348F GARFIELD AR
2018-09-19 479-346 0–9 XXXwhole prefix which blocks → ONVOY, LLC - AR 348F GATEWAY AR
2018-09-19 479-348 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - AR 348F MAYSVILLE AR

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.