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
2021-10-28 747-488 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H SNFN SNFN CA
2021-10-28 830-354 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C DEL RIO TX
2021-10-28 830-362 0–9 XXXall 10 · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H FREDECKSBG TX
2021-10-28 830-364 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC - TX 903C HONDO TX
2021-10-28 840-207 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 ARROWHEAD CA
2021-10-28 840-588 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H DIAMONDBAR CA
2021-10-28 840-677 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H ETIWANDA CA
2021-10-28 872-295 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN03 IL
2021-10-28 872-296 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC 224C CHICGOZN03 IL
2021-10-28 872-336 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H CHICGOZN01 IL
2021-10-28 872-946 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H CHICGOZN03 IL
2021-10-28 909-916 0XXX1XXX2XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E BIGBEAR LK CA
2021-10-28 945-228 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F CEDAR HILL TX
2021-10-28 971-417 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 PORTLAND OR
2021-10-27 224-455 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H WAUKEGAN IL
2021-10-27 224-466 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H NORTHBROOK IL
2021-10-27 224-833 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H ELGIN IL
2021-10-27 224-844 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H ARLIGTNHTS IL
2021-10-27 269-346 0XXX3XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - MI 991E HOPKINS MI
2021-10-27 302-586 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - DE 073F MILFORD DE
2021-10-27 319-303 1XXX2XXX7XXX8XXX · 4 holders which blocks → AUREON COMMUNICATIONS, LLC 444G DENVER IA
2021-10-27 319-305 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 5 holders which blocks → AUREON COMMUNICATIONS, LLC 444G MT VERNON IA
2021-10-27 331-758 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H AURORA IL
2021-10-27 413-450 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E AMHERST MA
2021-10-27 463-258 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - IN 105F DANVILLE IN
2021-10-27 463-259 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - IN 105F CUMBERLAND IN
2021-10-27 470-879 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - GA 983E CARROLLTON GA
2021-10-27 551-334 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 KEARNY NJ
2021-10-27 571-516 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 TRIANGLE VA
2021-10-27 662-683 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → POWERTEL MEMPHIS LICENSES, INC. 7474 CLARKSDALE MS
2021-10-27 689-263 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 WINTERPARK FL
2021-10-27 743-236 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 LEXINGTON NC
2021-10-27 840-205 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E CLAREMONT CA
2021-10-27 986-866 0XXX1XXX6XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H OROFINO ID
2021-10-26 213-592 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 03 CA
2021-10-26 216-474 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F INDEPNDNCE OH
2021-10-26 219-295 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - IN 105F CROWNPOINT IN
2021-10-26 231-390 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 BIG RAPIDS MI
2021-10-26 236-514 not yet reported which blocks → Videotron Ltd. 787G Vancouver —
2021-10-26 236-515 not yet reported which blocks → Videotron Ltd. 787G Vancouver —
2021-10-26 236-516 not yet reported which blocks → Videotron Ltd. 787G Vancouver —
2021-10-26 309-900 0XXX1XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H FARMINGTON IL
2021-10-26 341-207 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E RICHMOND CA
2021-10-26 341-208 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 HAYWARD CA
2021-10-26 346-517 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F BARKER TX
2021-10-26 347-519 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC- NY 384C NWYRCYZN06 NY
2021-10-26 385-426 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - UT 117F CLEARFIELD UT
2021-10-26 385-443 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 SALT LAKE UT
2021-10-26 385-451 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 KAYSVILLE UT
2021-10-26 437-255 not yet reported which blocks → Videotron Ltd. 787G Toronto —

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.