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
Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2002-09-22 440-310 4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH 7443 COLUMBISTA OH
2002-09-20 503-354 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OR 3234 TILLAMOOK OR
2002-09-20 706-623 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - GA 6116 EATONTON GA
2002-09-20 740-260 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CAMBRIDGE OH
2002-09-20 760-840 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 ENCINITAS CA
2002-09-20 770-572 not yet reported which blocks → METROPCS, INC. 5562 FLOWEYBRCH GA
2002-09-20 775-341 1XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → MATRIX TELECOM, LLC. S/I/I TNCI - NV 2817 HAWTHORNE NV
2002-09-20 775-346 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NV 6458 ROUND MT NV
2002-09-20 805-260 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SANTAMARIA CA
2002-09-20 805-574 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 ARROYOGRND CA
2002-09-20 805-703 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → T-MOBILE USA, INC. 6529 ATASCADERO CA
2002-09-20 818-744 1XXX2XXX7XXX which blocks → T-MOBILE USA, INC. 6529 SNFN SNFN CA
2002-09-20 818-915 7XXX which blocks → T-MOBILE USA, INC. 6529 NO HOLLYWD CA
2002-09-20 909-844 none assigned yet which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 S BERNDINO CA
2002-09-20 912-289 2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - GA 6116 BRUNSWICK GA
2002-09-20 925-913 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 BSHP RNCH CA
2002-09-20 925-914 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 CLAYTON CA
2002-09-20 925-915 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 DANVILLE CA
2002-09-20 925-917 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 MARTINEZ CA
2002-09-20 925-922 3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 PLEASANTON CA
2002-09-20 937-665 2XXX8XXX9XXX · 2 holders which blocks → CINCINNATI BELL EXTENDED TERRITORIES LLC - OH 309B VANDALIA OH
2002-09-20 949-690 4XXX which blocks → T-MOBILE USA, INC. 6529 SADLBK VLY CA
2002-09-20 949-701 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 IRVINE CA
2002-09-20 949-742 3XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 TRABUCO CA
2002-09-20 949-903 7XXX which blocks → T-MOBILE USA, INC. 6529 NEWPORTBCH CA
2002-09-19 209-502 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → T-MOBILE USA, INC. 6529 RIVERBANK CA
2002-09-19 209-542 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 HUGHSON CA
2002-09-19 209-676 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → T-MOBILE USA, INC. 6529 ATWATER CA
2002-09-19 209-764 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → T-MOBILE USA, INC. 6529 OAKDALE CA
2002-09-19 224-293 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 7 holders which blocks → ILLINOIS BELL TEL CO 9329 DUNDEE IL
2002-09-19 228-261 6XXX9XXX · 2 holders which blocks → METROPCS, INC. 5562 GULFPORT MS
2002-09-19 252-505 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 PLYMOUTH NC
2002-09-19 252-506 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 GATESVILLE NC
2002-09-19 252-507 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 ROANOKERPD NC
2002-09-19 252-508 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 WILLIAMSTN NC
2002-09-19 252-509 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 WINDSOR NC
2002-09-19 252-548 2XXX3XXX4XXX5XXX6XXX8XXX · 4 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ELIZABTHCY NC
2002-09-19 252-648 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 MOREHEADCY NC
2002-09-19 252-649 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NC 3235 NEW BERN NC
2002-09-19 270-971 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - KY 4369 LEITCHFLD KY
2002-09-19 270-972 2XXX7XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - KY 4369 LEBANON KY
2002-09-19 270-973 1XXX2XXX3XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - KY 4369 GREENSBURG KY
2002-09-19 270-974 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - KY 4369 COLUMBIA KY
2002-09-19 270-975 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - KY 4369 BROWNSVL KY
2002-09-19 323-350 not yet reported which blocks → T-MOBILE USA, INC. 6529 LSAN DA 04 CA
2002-09-19 323-788 not yet reported which blocks → T-MOBILE USA, INC. 6529 LSAN DA 05 CA
2002-09-19 360-860 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 KINGSTON WA
2002-09-19 360-861 0–9 XXXall 10 · 6 holders which blocks → UNITED STATES CELLULAR - WA 6270 ELMA WA
2002-09-19 408-429 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 CAMPBELL CA
2002-09-19 415-612 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 IGNACIO 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.