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
2022-07-28 385-471 T-MOBILE USA, INC. 6529 KAYSVILLE UT
2022-07-27 319-340 T-MOBILE USA, INC. 6529 WATERLOO IA
2022-07-27 580-469 T-MOBILE USA, INC. 6529 SAYRE OK
2022-07-27 986-230 T-MOBILE USA, INC. 6529 BOISE ID
2022-07-22 620-454 T-MOBILE USA, INC. 6529 ARKANSASCY KS
2022-07-22 620-602 T-MOBILE USA, INC. 6529 KINGMAN KS
2022-07-22 626-613 T-MOBILE USA, INC. 6529 ALHAMBRA CA
2022-07-22 657-612 T-MOBILE USA, INC. 6529 GARDEN GRV CA
2022-07-21 669-321 T-MOBILE USA, INC. 6529 SNJS SOUTH CA
2022-07-21 720-953 T-MOBILE USA, INC. 6529 DENVER CO
2022-07-21 808-509 T-MOBILE USA, INC. 6529 HONOLULU HI
2022-07-21 915-332 T-MOBILE USA, INC. 6529 EL PASO TX
2022-07-14 213-682 T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2022-07-14 425-540 T-MOBILE USA, INC. 6529 BOTHELL WA
2022-07-14 442-390 T-MOBILE USA, INC. 6529 ENCINITAS CA
2022-07-14 480-906 T-MOBILE USA, INC. 6529 PHOENIX AZ
2022-07-14 619-853 T-MOBILE USA, INC. 6529 CHULAVISTA CA
2022-07-14 623-286 T-MOBILE USA, INC. 6529 PHOENIX AZ
2022-07-14 657-608 T-MOBILE USA, INC. 6529 ORANGE CA
2022-07-14 805-972 T-MOBILE USA, INC. 6529 LOMPOC CA
2022-07-13 775-495 T-MOBILE USA, INC. 6529 GARDNERVL NV
2022-06-28 737-326 T-MOBILE USA, INC. 6529 AUSTIN TX
2022-06-28 737-328 T-MOBILE USA, INC. 6529 AUSTIN TX
2022-06-14 725-275 T-MOBILE USA, INC. 6529 LAS VEGAS NV
2022-06-13 580-865 T-MOBILE USA, INC. 6529 PONCA CITY OK
2022-06-13 605-308 T-MOBILE USA, INC. 6529 NOSIOUX CY SD
2022-06-08 209-960 T-MOBILE USA, INC. 6529 TURLOCK CA
2022-06-08 513-957 T-MOBILE USA, INC. 6529 SEVEN MILE OH
2022-05-27 213-571 T-MOBILE USA, INC. 6529 LSAN DA 10 CA
2022-05-27 505-523 T-MOBILE USA, INC. 6529 ALBUQURQUE NM
2022-05-27 626-563 T-MOBILE USA, INC. 6529 PSDN PSDN CA
2022-05-27 626-601 T-MOBILE USA, INC. 6529 LA PUENTE CA
2022-05-27 737-323 T-MOBILE USA, INC. 6529 LEANDER TX
2022-05-27 737-324 T-MOBILE USA, INC. 6529 LEANDER TX
2022-05-27 971-430 T-MOBILE USA, INC. 6529 PORTLAND OR
2022-05-17 213-569 T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2022-05-17 925-501 T-MOBILE USA, INC. 6529 ANTIOCH CA
2022-05-17 951-610 T-MOBILE USA, INC. 6529 PERRIS CA
2022-05-13 945-257 T-MOBILE USA, INC. 6529 FRISCO TX
2022-05-04 620-601 T-MOBILE USA, INC. 6529 PRATT KS
2022-05-02 564-218 T-MOBILE USA, INC. 6529 BREMERTON WA
2022-04-29 539-316 T-MOBILE USA, INC. 6529 MCALESTER OK
2022-04-29 573-816 T-MOBILE USA, INC. 6529 SIKESTON MO
2022-04-29 580-707 T-MOBILE USA, INC. 6529 ENID OK
2022-04-29 920-580 T-MOBILE USA, INC. 6529 OSHKOSH WI
2022-04-28 563-366 T-MOBILE USA, INC. 6529 CRESCO IA
2022-04-28 641-255 T-MOBILE USA, INC. 6529 MASON CITY IA
2022-04-28 641-261 T-MOBILE USA, INC. 6529 TOLEDO IA
2022-04-28 915-299 T-MOBILE USA, INC. 6529 EL PASO TX
2022-04-25 657-585 T-MOBILE USA, INC. 6529 SANTA ANA 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.