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
2021-10-25 502-789 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H SHEPHEDSVL KY
2021-10-25 520-605 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - AZ 587F TUCSON AZ
2021-10-25 562-669 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H NORWALK CA
2021-10-25 567-359 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MANSFIELD OH
2021-10-25 567-500 0XXX1XXX2XXX5XXX · 4 holders which blocks → FRACTEL, LLC 965H ATTICA OH
2021-10-25 580-400 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H LAWTON OK
2021-10-25 667-359 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - MD 071F COLUMBIA MD
2021-10-25 667-899 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H BALTIMORE MD
2021-10-25 672-868 not yet reported which blocks → Fibernetics Corporation 464D Winter Harbour —
2021-10-25 672-869 not yet reported which blocks → Fibernetics Corporation 464D Tahsis —
2021-10-25 672-870 not yet reported which blocks → Fibernetics Corporation 464D Port Renfrew —
2021-10-25 672-871 not yet reported which blocks → Fibernetics Corporation 464D Ocean Falls —
2021-10-25 672-872 not yet reported which blocks → Fibernetics Corporation 464D Jordan River —
2021-10-25 708-312 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E BLUEISLAND IL
2021-10-25 720-831 0–9 XXXall 10 · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CO 7378 DENVER CO
2021-10-25 720-853 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CO 078F LONGMONT CO
2021-10-25 720-869 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 DENVER CO
2021-10-25 720-894 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - CO 078F DECKERS CO
2021-10-25 734-541 2XXX5XXX · 2 holders which blocks → NUSO, LLC 478J NOSYLVANIA MI
2021-10-25 762-732 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H COMMERCE GA
2021-10-25 808-302 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 478J HONOLULU HI
2021-10-25 816-955 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H KANSASCITY MO
2021-10-25 830-349 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 CASTROVL TX
2021-10-25 840-688 0XXX1XXX2XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H CRESTLINE CA
2021-10-25 878-239 0XXX1XXX2XXX3XXX6XXX8XXX9XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J ZELIENOPLE PA
2021-10-25 878-336 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H PTTSBGZON6 PA
2021-10-25 878-465 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H WEXFORD PA
2021-10-25 928-732 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H LKHAVASUCY AZ
2021-10-25 930-251 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 3 holders which blocks → NUSO, LLC 478J EVANSVILLE IN
2021-10-25 971-415 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - OR 076F PORTLAND OR
2021-10-25 986-213 0–9 XXXall 10 · 5 holders which blocks → IP HORIZON LLC 515J BOISE ID
2021-10-25 986-215 1XXX5XXX · 2 holders which blocks → IP HORIZON LLC 515J COERDALENE ID
2021-10-22 216-457 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 CLEVELAND OH
2021-10-22 216-460 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 MONTRSE OH
2021-10-22 216-463 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 CLEVELAND OH
2021-10-22 216-467 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 TERRACE OH
2021-10-22 276-280 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H BLUEFIELD VA
2021-10-22 351-667 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H ACTON MA
2021-10-22 360-803 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - WA 483E RIDGEFIELD WA
2021-10-22 367-380 not yet reported which blocks → Videotron Ltd. 328F Quebec —
2021-10-22 438-376 not yet reported which blocks → Videotron Ltd. 328F Montreal —
2021-10-22 559-628 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E CLOVIS CA
2021-10-22 667-788 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → QUANTUM TELECOMMUNICATIONS, INC. - MD 2596 WESTMINSTR MD
2021-10-22 672-873 not yet reported which blocks → Fibernetics Corporation 464D Holberg —
2021-10-22 672-874 not yet reported which blocks → Fibernetics Corporation 464D Ganges —
2021-10-22 672-875 not yet reported which blocks → Fibernetics Corporation 464D Fulford Harbour —
2021-10-22 689-946 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H WINTERGRDN FL
2021-10-22 725-263 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - NV 075F LAS VEGAS NV
2021-10-22 725-264 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LAS VEGAS NV
2021-10-22 737-308 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX

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.