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
2013-06-20 910-758 0–9 XXXall 10 · 6 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J FAYETTEVL NC
2013-06-20 980-938 0–9 XXXall 10 · 7 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J CHARLOTTE NC
2013-06-19 469-291 0–9 XXXall 10 · 4 holders which blocks → SOUTHWESTERN BELL 9533 DALLAS TX
2013-06-19 702-906 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 LAS VEGAS NV
2013-06-19 916-472 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 RSVL MAIN CA
2013-06-18 210-906 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 SANANTONIO TX
2013-06-18 234-229 0–9 XXXall 10 · 2 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K MANCHESTR OH
2013-06-18 234-252 0–9 XXXall 10 · 7 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K LOUISVILLE OH
2013-06-18 234-813 0–9 XXXall 10 · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K MOGADORE OH
2013-06-18 281-662 0–9 XXXwhole prefix which blocks → METROPCS, INC. 5562 CHANNELVW TX
2013-06-18 385-325 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - UT 117F SPRINGVL UT
2013-06-18 409-205 0–9 XXXall 10 · 5 holders which blocks → SOUTHWESTERN BELL 9533 SABINEPASS TX
2013-06-18 440-560 0XXX1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → GREAT WAVE BROADBAND SERVICES, LLC 032H ROCK CREEK OH
2013-06-18 440-990 0–9 XXXall 10 · 3 holders which blocks → GREAT WAVE BROADBAND SERVICES, LLC 032H ASHTABULA OH
2013-06-18 469-353 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 FRISCO TX
2013-06-18 469-804 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 DALLAS TX
2013-06-18 507-591 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN 5816 MARSHALL MN
2013-06-18 512-872 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 AUSTIN TX
2013-06-18 740-770 0XXX7XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 FRANKFORT OH
2013-06-18 740-940 0XXX7XXX9XXX · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K MASSIEVL OH
2013-06-18 810-216 0–9 XXXall 10 · 4 holders which blocks → TELNET WORLDWIDE, INC. 817J PORT HURON MI
2013-06-18 832-792 0–9 XXXall 10 · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 HOUSTON TX
2013-06-17 267-789 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J PHPHSBZN43 PA
2013-06-17 424-321 0–9 XXXall 10 · 7 holders which blocks → T-MOBILE USA, INC. 6529 EL SEGUNDO CA
2013-06-17 717-969 0–9 XXXall 10 · 8 holders which blocks → COMCAST IP PHONE, LLC 318J HANOVER PA
2013-06-17 832-751 0–9 XXXwhole prefix which blocks → SOUTHWESTERN BELL 9533 HOUSTON TX
2013-06-17 909-485 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 ARROWHEAD CA
2013-06-17 956-352 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 RIGRANDECY TX
2013-06-17 956-509 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BROWNSVL TX
2013-06-14 234-804 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 CANTON OH
2013-06-14 314-665 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 ST LOUIS MO
2013-06-14 437-887 not yet reported which blocks → Fibernetics Corporation 464D Toronto —
2013-06-14 438-228 not yet reported which blocks → Fibernetics Corporation 464D Montreal —
2013-06-14 440-830 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 6 holders which blocks → T-MOBILE USA, INC. 6529 LORAIN OH
2013-06-14 484-425 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 ALLENTOWN PA
2013-06-14 581-720 not yet reported which blocks → TELUS Quebec 8083 Rimouski —
2013-06-14 585-446 0–9 XXXall 10 · 8 holders which blocks → LEVEL 3 TELECOM OF NEW YORK, LP - NY 8473 W WEBSTER NY
2013-06-14 586-522 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MT CLEMENS MI
2013-06-14 612-806 0–9 XXXall 10 · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 TWINCITIES MN
2013-06-14 615-913 0–9 XXXall 10 · 4 holders which blocks → POWERTEL NASHVILLE LICENSES, INC. 7476 NASHVILLE TN
2013-06-14 631-449 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 BRENTWOOD NY
2013-06-14 647-252 not yet reported which blocks → TELUS Integrated Communications 2782 Toronto —
2013-06-14 647-790 not yet reported which blocks → TELUS Integrated Communications 2782 Toronto —
2013-06-14 785-802 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J JUNCTIONCY KS
2013-06-14 808-725 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 HONOLULU HI
2013-06-14 819-982 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Maniwaki —
2013-06-14 873-405 not yet reported which blocks → TELUS Quebec 2243 Shawinigan —
2013-06-14 928-293 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 KINGMAN AZ
2013-06-13 213-263 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K LSAN DA 10 CA
2013-06-13 219-702 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 GARY IN

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.