NumberResearch Membership · Data 09/24/2026

Recent prefix assignments

352 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 31
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
ONVOY, LLC - NJ 15
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
2022-07-21 925-502 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 DANVILLE CA
2022-07-21 937-345 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F DAYTON OH
2022-07-20 331-287 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E AURORA IL
2022-07-20 346-575 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F HSTNSUBURB TX
2022-07-20 385-463 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MIDVALE UT
2022-07-20 478-874 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H MACON GA
2022-07-20 520-653 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - AZ 587F TUCSON AZ
2022-07-20 572-275 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H OKLA CITY OK
2022-07-20 661-610 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 BKFD MAIN CA
2022-07-20 689-281 0–9 XXXall 10 · 5 holders which blocks → WOW! INTERNET, CABLE AND PHONE 961J SANFORD FL
2022-07-20 943-208 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - GA 8392 BUFORD GA
2022-07-19 220-231 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7836 JOHNSTOWN OH
2022-07-19 307-230 0XXX which blocks → BANDWIDTH.COM CLEC, LLC - WY 081F BORDER WY
2022-07-19 332-267 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN01 NY
2022-07-19 343-992 not yet reported which blocks → Bell Canada 8051 Ottawa-Hull —
2022-07-19 343-993 not yet reported which blocks → Bell Canada 8051 Ottawa-Hull —
2022-07-19 404-282 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - GA 983E ATLANTA GA
2022-07-19 404-533 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H ATLANTA GA
2022-07-19 412-239 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PTTSBGZON1 PA
2022-07-19 474-895 not yet reported which blocks → TELUS Integrated Communications 2782 Assiniboia —
2022-07-19 474-896 not yet reported which blocks → TELUS Integrated Communications 2782 Tisdale —
2022-07-19 474-897 not yet reported which blocks → TELUS Integrated Communications 2782 Nipawin —
2022-07-19 474-898 not yet reported which blocks → TELUS Integrated Communications 2782 Melfort —
2022-07-19 474-899 not yet reported which blocks → TELUS Integrated Communications 2782 Humboldt —
2022-07-19 484-890 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 READING PA
2022-07-19 561-879 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 BELLEGLADE FL
2022-07-19 713-832 0–9 XXXwhole prefix which blocks → ONVOY, LLC - TX 903C HOUSTON TX
2022-07-19 770-273 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - GA 983E ATLANTA NW GA
2022-07-18 206-750 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H SEATTLE WA
2022-07-18 343-991 not yet reported which blocks → Bell Canada 8051 Ottawa-Hull —
2022-07-18 367-382 not yet reported which blocks → Videotron Ltd. 328F Quebec —
2022-07-18 424-525 0–9 XXXall 10 · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H SNMN MRVS CA
2022-07-18 424-626 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H W ANGELES CA
2022-07-18 657-607 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2022-07-18 873-307 not yet reported which blocks → Bell Mobility 6574 Trois-Rivieres —
2022-07-15 225-422 0–9 XXXall 10 · 6 holders which blocks → ONVOY SPECTRUM, LLC 624H ALBANY LA
2022-07-15 254-264 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 EASTLAND TX
2022-07-15 269-360 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 KALAMAZOO MI
2022-07-15 301-381 0–9 XXXwhole prefix which blocks → ONVOY, LLC - MD 876D WSHNGTNZN2 MD
2022-07-15 301-450 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSHNGTNZN3 MD
2022-07-15 313-391 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 DETROITZN5 MI
2022-07-15 331-286 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 ST CHARLES IL
2022-07-15 332-261 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN01 NY
2022-07-15 332-265 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN01 NY
2022-07-15 332-266 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 NWYRCYZN01 NY
2022-07-15 346-574 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SPRING TX
2022-07-15 601-524 0–9 XXXwhole prefix which blocks → ONVOY, LLC - MS 719E JACKSON MS
2022-07-15 623-294 0–9 XXXwhole prefix which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2022-07-15 659-255 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AL 5255 BESSEMER AL
2022-07-15 689-280 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 LKBUNAVIST FL

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.