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
2021-11-18 269-374 0XXX1XXX2XXX4XXX5XXX8XXX · 4 holders which blocks → ONVOY, LLCV - MI 543C MARSHALL MI
2021-11-18 272-281 0XXX2XXX3XXX4XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 TUNKHANNCK PA
2021-11-18 303-616 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H KEENESBURG CO
2021-11-18 313-490 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E DETROITZN6 MI
2021-11-18 346-526 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 HOUSTON TX
2021-11-18 424-462 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 SAN PEDRO CA
2021-11-18 447-218 1XXX8XXX9XXX · 2 holders which blocks → STRATUS NETWORKS 495J CHAMPAURBN IL
2021-11-18 470-894 0–9 XXXwhole prefix which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 WINDER GA
2021-11-18 470-896 0–9 XXXwhole prefix which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 WINDER GA
2021-11-18 470-903 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - GA 6116 ATLANTA GA
2021-11-18 475-301 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2021-11-18 475-307 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - CT 6624 MERIDEN CT
2021-11-18 475-310 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - CT 199F WALLINGFD CT
2021-11-18 505-512 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NM 123F FARMINGTON NM
2021-11-18 507-809 0XXX1XXX3XXX7XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - MN 980E AUSTIN MN
2021-11-18 510-721 0–9 XXXwhole prefix which blocks → ONVOY, LLC - CA 649C OKLD MN-PD CA
2021-11-18 539-267 0XXX3XXX4XXX7XXX9XXX · 3 holders which blocks → ONVOY, LLC - OK 409F CHELSEA OK
2021-11-18 539-300 0XXX1XXX3XXX7XXX · 4 holders which blocks → FRACTEL, LLC 965H WESTVILLE OK
2021-11-18 551-335 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 HACKENSACK NJ
2021-11-18 571-478 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN08 VA
2021-11-18 616-354 4XXX5XXX which blocks → ONVOY, LLCV - MI 543C GREENVILLE MI
2021-11-18 639-296 not yet reported which blocks → Fibernetics Corporation 464D Regina Beach —
2021-11-18 657-556 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CYPRESS CA
2021-11-18 662-853 4XXX7XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 SMITHVILLE MS
2021-11-18 720-871 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 LONGMONT CO
2021-11-18 754-280 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 HOLLYWOOD FL
2021-11-18 762-308 0–9 XXXall 10 · 2 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 LAGRANGE GA
2021-11-18 774-499 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BRIDGEWTR MA
2021-11-18 817-883 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 ARLINGTON TX
2021-11-18 828-647 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E CANTON NC
2021-11-18 845-903 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 MONTICELLO NY
2021-11-18 845-906 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NYACK NY
2021-11-18 858-330 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 RNCHOPNQTS CA
2021-11-18 862-375 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NJ 118F BUTLER NJ
2021-11-18 864-759 0XXX1XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - SC 077F BELTON SC
2021-11-18 864-765 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - SC 077F CENTRAL SC
2021-11-18 864-769 0XXX1XXX2XXX3XXX8XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - SC 077F PELZER SC
2021-11-18 864-771 0XXX1XXX2XXX3XXX4XXX5XXX8XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - SC 077F PENDLETON SC
2021-11-18 908-539 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - NJ 118F CHESTER NJ
2021-11-18 912-606 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - GA 8392 VIDALIA GA
2021-11-18 914-531 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 MOUNTKISCO NY
2021-11-18 934-225 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E SHOREHAM NY
2021-11-18 939-326 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 CAROLINA PR
2021-11-18 951-604 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 HEMT SNJC CA
2021-11-18 984-313 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E ZEBULON NC
2021-11-17 213-778 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H LSAN DA 01 CA
2021-11-17 214-898 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H CELINA TX
2021-11-17 224-439 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 WAUKEGAN IL
2021-11-17 234-587 8XXX9XXX · 2 holders which blocks → FRACTEL, LLC 965H WAYLAND OH
2021-11-17 240-886 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN4 MD

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.