NumberResearch Membership · Data 09/25/2026

Recent prefix assignments

337 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/25/2026

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
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - IL 25
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 12
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
2021-11-22 719-677 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - CO 078F BUENAVISTA CO
2021-11-22 725-270 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NV 6458 LAS VEGAS NV
2021-11-22 779-340 0XXX1XXX2XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E COAL CITY IL
2021-11-22 860-699 0XXX1XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CT 199F LEDYARD CT
2021-11-22 910-906 0–9 XXXall 10 · 8 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E CASTLEHAYN NC
2021-11-22 928-400 0XXX4XXX · 2 holders which blocks → FRACTEL, LLC 965H WIKIEUP AZ
2021-11-22 951-606 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SUN CITY CA
2021-11-21 341-212 0–9 XXXall 10 · 3 holders which blocks → TELNYX LLC 073H OKLD BKLY CA
2021-11-21 831-842 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H APTOS CA
2021-11-19 262-276 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - WI 007F HARTFORD WI
2021-11-19 341-344 0–9 XXXall 10 · 3 holders which blocks → SONIC TELECOM, LLC - CA 433E OKLD TRNID CA
2021-11-19 346-527 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - TX 903C KATY TX
2021-11-19 458-867 0–9 XXXall 10 · 4 holders which blocks → COMMIO, LLC 939H EUGENE OR
2021-11-19 470-901 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ATLANTA NE GA
2021-11-19 470-904 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ATLANTA SO GA
2021-11-19 470-905 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ATLANTA GA
2021-11-19 470-906 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H ATLANTA GA
2021-11-19 470-940 0–9 XXXall 10 · 2 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J WINDER GA
2021-11-19 639-381 not yet reported which blocks → Fibernetics Corporation 464D Indian Head —
2021-11-19 639-418 not yet reported which blocks → Fibernetics Corporation 464D Langham —
2021-11-19 681-276 0XXX1XXX2XXX3XXX5XXX6XXX7XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - WV 080F BUCKHANNON WV
2021-11-19 681-309 0XXX2XXX6XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - WV 080F GRAFTON WV
2021-11-19 914-535 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSCHSTZN03 NY
2021-11-18 213-645 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 LSAN DA 10 CA
2021-11-18 251-376 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MOBILE AL
2021-11-18 256-948 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 SCOTTSBORO AL
2021-11-18 262-304 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - WI 225C CEDARBURG WI
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

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.