NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

360 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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 26
Rogers Communications Canada Inc. (Wireless) 23
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
2021-07-01 858-315 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CHULAVISTA CA
2021-07-01 858-316 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CHULAVISTA CA
2021-07-01 913-786 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → FRACTEL, LLC 965H ATCHISON KS
2021-06-30 209-871 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 STOCKTON CA
2021-06-30 346-478 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F SPRING TX
2021-06-30 458-270 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F VENETA OR
2021-06-30 458-271 0XXX1XXX2XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 ROSEBURG OR
2021-06-30 480-746 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AZ 3285 PHOENIX AZ
2021-06-30 539-250 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 BROKENARRW OK
2021-06-30 539-251 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 PRYOR OK
2021-06-30 551-323 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 UNION CITY NJ
2021-06-30 657-508 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 CYPRESS CA
2021-06-30 661-519 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ARVIN CA
2021-06-30 682-353 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - TX 903C EULESS TX
2021-06-30 707-807 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ROSA CA
2021-06-30 726-212 0–9 XXXwhole prefix which blocks → TWC IP ENABLED SERVICES, LLC 793K SANANTONIO TX
2021-06-30 802-305 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - VT 451F ESSEX JCT VT
2021-06-30 908-449 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 PLAINFIELD NJ
2021-06-30 945-205 0XXX1XXX2XXX3XXX6XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F BLUE RIDGE TX
2021-06-30 959-226 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEWBRITAIN CT
2021-06-29 308-456 0XXX1XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NE 3233 MITCHELL NE
2021-06-29 318-782 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA LA - LLC 653C ALEXANDRIA LA
2021-06-29 413-419 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 CHICOPEE MA
2021-06-29 580-390 0XXX1XXX2XXX3XXX8XXX9XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 ELK CITY OK
2021-06-29 603-584 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 CONCORD NH
2021-06-29 608-944 1XXX2XXX3XXX4XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H WOODFORD WI
2021-06-29 618-738 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E ALTAMONT IL
2021-06-29 636-252 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 CHESTERFLD MO
2021-06-29 669-577 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H SUNNYVALE CA
2021-06-29 774-486 0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 MILLBURY MA
2021-06-29 786-791 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E NORTH DADE FL
2021-06-29 857-376 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 BROOKLINE MA
2021-06-29 873-830 not yet reported which blocks → Cooptel 818D Danville —
2021-06-29 939-317 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 CAROLINA PR
2021-06-28 380-232 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - OH 464C DUBLIN OH
2021-06-28 431-395 not yet reported which blocks → Bell Mobility 6574 Winnipeg —
2021-06-28 437-516 not yet reported which blocks → Bell Mobility 6574 Toronto —
2021-06-28 438-594 not yet reported which blocks → Bell Mobility 6574 Montreal —
2021-06-28 520-580 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H SUPERIOR AZ
2021-06-28 534-203 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - WI 225C RIVERFALLS WI
2021-06-28 608-706 0XXX1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 TOMAH WI
2021-06-28 659-233 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - AL 072F COLUMBIANA AL
2021-06-28 810-268 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 FLINT MI
2021-06-28 810-281 0XXX2XXX7XXX8XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 LEXINGTON MI
2021-06-28 825-447 not yet reported which blocks → Bell Mobility 6574 Calgary —
2021-06-28 913-405 0–9 XXXall 10 · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 GARDNER KS
2021-06-28 929-599 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H NWYRCYZN10 NY
2021-06-28 938-204 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - AL 072F CHILDERSBG AL
2021-06-28 947-239 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 CLARKSTON MI
2021-06-25 213-561 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 07 CA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.