NumberResearch Membership · Data 09/18/2026

Recent prefix assignments

5 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/18/2026

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
2022-01-10 341-213 T-MOBILE USA, INC. 6529 OKLD MN-PD CA
2022-01-10 657-540 T-MOBILE USA, INC. 6529 HUNTITNBCH CA
2022-01-10 657-543 T-MOBILE USA, INC. 6529 SANTA ANA CA
2022-01-10 669-308 T-MOBILE USA, INC. 6529 SNJS NORTH CA
2022-01-09 808-743 T-MOBILE USA, INC. 6529 WAILUKU HI
2022-01-07 206-746 T-MOBILE USA, INC. 6529 BAINBDG IS WA
2022-01-07 213-649 T-MOBILE USA, INC. 6529 LSAN DA 11 CA
2022-01-07 253-349 T-MOBILE USA, INC. 6529 AUBURN WA
2022-01-07 424-471 T-MOBILE USA, INC. 6529 REDONDO CA
2022-01-07 442-375 T-MOBILE USA, INC. 6529 OCSD OCSD CA
2022-01-07 564-219 T-MOBILE USA, INC. 6529 VANCOUVER WA
2022-01-07 626-635 T-MOBILE USA, INC. 6529 AZUSA CA
2022-01-07 628-283 T-MOBILE USA, INC. 6529 SNFC MT-EV CA
2022-01-07 650-671 T-MOBILE USA, INC. 6529 SSNFRNCSCO CA
2022-01-07 747-321 T-MOBILE USA, INC. 6529 SNFN PACM CA
2022-01-07 928-464 T-MOBILE USA, INC. 6529 WICKENBURG AZ
2022-01-07 928-469 T-MOBILE USA, INC. 6529 PARKER AZ
2022-01-04 563-307 T-MOBILE USA, INC. 6529 DUBUQUE IA
2021-12-20 682-368 T-MOBILE USA, INC. 6529 WEATHERFD TX
2021-12-20 830-359 T-MOBILE USA, INC. 6529 NEWBRANFLS TX
2021-12-14 425-545 T-MOBILE USA, INC. 6529 RENTON WA
2021-12-14 539-260 T-MOBILE USA, INC. 6529 BROKENARRW OK
2021-12-14 559-768 T-MOBILE USA, INC. 6529 REEDLEY CA
2021-12-14 562-580 T-MOBILE USA, INC. 6529 LONG BEACH CA
2021-12-14 650-609 T-MOBILE USA, INC. 6529 MILLBRAE CA
2021-12-14 682-364 T-MOBILE USA, INC. 6529 GRANBURY TX
2021-12-14 682-366 T-MOBILE USA, INC. 6529 CLEBURNE TX
2021-12-14 840-210 T-MOBILE USA, INC. 6529 FONTANA CA
2021-12-10 279-216 T-MOBILE USA, INC. 6529 SCRM MAIN CA
2021-12-10 279-944 T-MOBILE USA, INC. 6529 SCRM NORTH CA
2021-12-10 424-475 T-MOBILE USA, INC. 6529 TORRANCE CA
2021-12-10 505-519 T-MOBILE USA, INC. 6529 GALLUP NM
2021-12-10 619-974 T-MOBILE USA, INC. 6529 CHULAVISTA CA
2021-12-10 626-630 T-MOBILE USA, INC. 6529 PSDN PSDN CA
2021-12-10 657-537 T-MOBILE USA, INC. 6529 SILVERADO CA
2021-12-10 661-569 T-MOBILE USA, INC. 6529 BKFD MAIN CA
2021-12-10 747-320 T-MOBILE USA, INC. 6529 CANOGAPARK CA
2021-12-10 951-605 T-MOBILE USA, INC. 6529 WOODCREST CA
2021-12-08 209-864 T-MOBILE USA, INC. 6529 ATWATER CA
2021-12-08 661-625 T-MOBILE USA, INC. 6529 SNCA NHCS CA
2021-12-08 747-306 T-MOBILE USA, INC. 6529 GLENDALE CA
2021-12-07 447-219 T-MOBILE USA, INC. 6529 CHARLESTON IL
2021-12-02 213-646 T-MOBILE USA, INC. 6529 LSAN DA 05 CA
2021-12-02 424-468 T-MOBILE USA, INC. 6529 BEVERLYHLS CA
2021-12-02 480-847 T-MOBILE USA, INC. 6529 PHOENIX AZ
2021-12-02 623-280 T-MOBILE USA, INC. 6529 PHOENIX AZ
2021-12-02 949-227 T-MOBILE USA, INC. 6529 IRVINE CA
2021-11-18 213-645 T-MOBILE USA, INC. 6529 LSAN DA 10 CA
2021-11-18 424-462 T-MOBILE USA, INC. 6529 SAN PEDRO CA
2021-11-18 657-556 T-MOBILE USA, INC. 6529 CYPRESS CA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/18/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.