NumberResearch Membership · Data 09/28/2026

Recent prefix assignments

334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/28/2026

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 19
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
2020-02-21 267-891 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 LANSDALE PA
2020-02-21 437-381 not yet reported which blocks → Bell Mobility 6574 Toronto —
2020-02-21 437-506 not yet reported which blocks → Bell Mobility 6574 Toronto —
2020-02-21 501-393 0XXX1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - AR 196F PANGBURN AR
2020-02-21 506-990 not yet reported which blocks → Iristel Inc. 154E Doaktown —
2020-02-21 807-806 not yet reported which blocks → Iristel Inc. 154E Geraldton —
2020-02-20 210-940 0–9 XXXall 10 · 2 holders which blocks → HD CARRIER LLC 321J SANANTONIO TX
2020-02-20 239-946 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H CAPE CORAL FL
2020-02-20 254-504 9XXX which blocks → HD CARRIER LLC 321J WACO TX
2020-02-20 405-890 0XXX1XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 STELLA OK
2020-02-20 438-295 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-02-20 540-210 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - VA 138E CALVERTON VA
2020-02-20 602-806 0–9 XXXwhole prefix which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2020-02-20 623-323 0–9 XXXwhole prefix which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2020-02-20 659-599 0–9 XXXwhole prefix which blocks → ONVOY, LLC - AL 604E BIRMINGHAM AL
2020-02-20 681-581 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - WV 449F VAN WV
2020-02-20 681-881 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - WV 449F WHARTON WV
2020-02-20 720-674 0–9 XXXall 10 · 2 holders which blocks → COMCAST IP PHONE, LLC 318J DENVER CO
2020-02-20 762-247 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 THOMASTON GA
2020-02-20 786-748 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 MIAMI FL
2020-02-20 825-424 not yet reported which blocks → Bell Mobility 6574 Calgary —
2020-02-20 825-734 not yet reported which blocks → Bell Mobility 6574 Calgary —
2020-02-19 207-544 0–9 XXXall 10 · 4 holders which blocks → CSC WIRELESS, LLC 425J PORTLAND ME
2020-02-19 217-798 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MATTOON IL
2020-02-19 231-688 1XXX6XXX8XXX · 3 holders which blocks → FRACTEL, LLC 965H MERRITT MI
2020-02-19 231-977 0XXX2XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H MACKINAWCY MI
2020-02-19 234-268 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OH 464C ALLIANCE OH
2020-02-19 256-793 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 CULLMAN AL
2020-02-19 262-356 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H BOHNERS LK WI
2020-02-19 262-400 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H JACKSON WI
2020-02-19 262-600 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H HUBERTUS WI
2020-02-19 262-688 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H HARTLAND WI
2020-02-19 262-722 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H WAUKESHA WI
2020-02-19 262-766 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H EAST TROY WI
2020-02-19 262-799 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H MILWAUKZN2 WI
2020-02-19 262-855 0XXX5XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H SHARON WI
2020-02-19 262-944 1XXX2XXX3XXX4XXX6XXX7XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H WALWORTH WI
2020-02-19 269-300 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H BATTLE CRK MI
2020-02-19 269-356 7XXX9XXX which blocks → FRACTEL, LLC 965H DELTON MI
2020-02-19 269-444 2XXX3XXX4XXX5XXX6XXX8XXX · 5 holders which blocks → FRACTEL, LLC 965H WATERVLIET MI
2020-02-19 269-600 0XXX3XXX4XXX5XXX6XXX · 3 holders which blocks → FRACTEL, LLC 965H GALESBURG MI
2020-02-19 269-900 0XXX7XXX9XXX · 2 holders which blocks → FRACTEL, LLC 965H LACEY MI
2020-02-19 361-261 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 PORTLDGGRY TX
2020-02-19 401-291 0–9 XXXall 10 · 4 holders which blocks → CSC WIRELESS, LLC 425J PROVIDENCE RI
2020-02-19 413-361 0–9 XXXall 10 · 6 holders which blocks → CSC WIRELESS, LLC 425J SPRINGFLD MA
2020-02-19 430-269 0XXX1XXX2XXX7XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F PAYNE SPG TX
2020-02-19 431-206 not yet reported which blocks → Bell Mobility 6574 Winnipeg —
2020-02-19 438-245 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-02-19 438-287 not yet reported which blocks → Bell Mobility 6574 Montreal —
2020-02-19 469-793 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 MCKINNEY TX

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/28/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.