NumberResearch Membership · Data 2026-04

Recent prefix assignments

5 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 2026-04

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

Which carriers received which NPA-NXX prefixes, and where. Assignments are initial assignments from NANPA records — because of number portability, the current serving carrier of individual numbers may differ. For finer-grained activity, see the thousands-block view above.

Most active assignees, last 30 days
T-MOBILE USA, INC. 5
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-NXXAssigneeOCNRate centerState
2007-07-02 510-314 T-MOBILE USA, INC. 6529 HAYWARD CA
2007-06-25 801-512 T-MOBILE USA, INC. 6529 SALT LAKE UT
2007-06-22 805-248 T-MOBILE USA, INC. 6529 OXNARD CA
2007-06-22 818-233 T-MOBILE USA, INC. 6529 SNFN SNFN CA
2007-06-21 818-220 T-MOBILE USA, INC. 6529 BRBN BRBN CA
2007-06-20 626-494 T-MOBILE USA, INC. 6529 COVINA CA
2007-06-20 702-716 T-MOBILE USA, INC. 6529 LAS VEGAS NV
2007-06-20 760-619 T-MOBILE USA, INC. 6529 INDIO CA
2007-06-19 773-749 T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2007-06-14 773-952 T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2007-06-13 773-698 T-MOBILE USA, INC. 6529 CHICGOZN04 IL
2007-06-13 818-217 T-MOBILE USA, INC. 6529 SNFN GRHL CA
2007-06-12 702-578 T-MOBILE USA, INC. 6529 LAS VEGAS NV
2007-06-07 951-227 T-MOBILE USA, INC. 6529 CORONA CA
2007-06-06 520-443 T-MOBILE USA, INC. 6529 TUCSON AZ
2007-06-05 224-645 T-MOBILE USA, INC. 6529 NORTHBROOK IL
2007-06-01 405-537 T-MOBILE USA, INC. 6529 OKLA CITY OK
2007-05-23 513-578 T-MOBILE USA, INC. 6529 CINCINNATI OH
2007-05-23 515-943 T-MOBILE USA, INC. 6529 DES MOINES IA
2007-05-22 630-666 T-MOBILE USA, INC. 6529 ELMHURST IL
2007-05-18 323-470 T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2007-05-09 505-906 T-MOBILE USA, INC. 6529 GALLUP NM
2007-05-08 469-463 T-MOBILE USA, INC. 6529 GRANDPRARI TX
2007-05-04 818-916 T-MOBILE USA, INC. 6529 VAN NUYS CA
2007-05-03 253-282 T-MOBILE USA, INC. 6529 TACOMA WA
2007-04-30 702-426 T-MOBILE USA, INC. 6529 LAS VEGAS NV
2007-04-30 775-389 T-MOBILE USA, INC. 6529 ELKO NV
2007-04-27 801-793 T-MOBILE USA, INC. 6529 SALT LAKE UT
2007-04-26 206-446 T-MOBILE USA, INC. 6529 SEATTLE WA
2007-04-24 224-465 T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2007-04-24 323-455 T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2007-04-19 682-367 T-MOBILE USA, INC. 6529 ARLINGTON TX
2007-04-18 405-585 T-MOBILE USA, INC. 6529 SHAWNEE OK
2007-04-16 210-548 T-MOBILE USA, INC. 6529 SANANTONIO TX
2007-04-16 469-321 T-MOBILE USA, INC. 6529 GRANDPRARI TX
2007-04-09 801-615 T-MOBILE USA, INC. 6529 PROVO UT
2007-04-05 469-279 T-MOBILE USA, INC. 6529 GRANDPRARI TX
2007-04-03 682-234 T-MOBILE USA, INC. 6529 ARLINGTON TX
2007-03-29 206-631 T-MOBILE USA, INC. 6529 SEATTLE WA
2007-03-28 605-585 T-MOBILE USA, INC. 6529 NOSIOUX CY SD
2007-03-28 708-262 T-MOBILE USA, INC. 6529 TINLEYPARK IL
2007-03-26 760-605 T-MOBILE USA, INC. 6529 VICTORVL CA
2007-03-23 714-759 T-MOBILE USA, INC. 6529 CYPRESS CA
2007-03-23 909-244 T-MOBILE USA, INC. 6529 UPLAND CA
2007-03-22 702-412 T-MOBILE USA, INC. 6529 LAS VEGAS NV
2007-03-16 623-255 T-MOBILE USA, INC. 6529 PHOENIX AZ
2007-03-15 440-787 T-MOBILE USA, INC. 6529 LORAIN OH
2007-03-15 773-642 T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2007-03-15 773-803 T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2007-03-15 773-984 T-MOBILE USA, INC. 6529 CHICGOZN03 IL

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 2026-04 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.