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
2019-04-17 808-437 T-MOBILE USA, INC. 6529 HILO HI
2019-04-15 539-230 T-MOBILE USA, INC. 6529 SALLISAW OK
2019-04-15 918-883 T-MOBILE USA, INC. 6529 BARTLESVL OK
2019-04-12 661-690 T-MOBILE USA, INC. 6529 DELANO CA
2019-04-12 949-691 T-MOBILE USA, INC. 6529 NEWPORTBCH CA
2019-04-11 385-552 T-MOBILE USA, INC. 6529 KAYSVILLE UT
2019-04-11 725-218 T-MOBILE USA, INC. 6529 LAS VEGAS NV
2019-04-09 405-854 T-MOBILE USA, INC. 6529 STILLWATER OK
2019-04-09 580-943 T-MOBILE USA, INC. 6529 DUNCAN OK
2019-04-09 720-681 T-MOBILE USA, INC. 6529 DENVER CO
2019-04-08 405-836 T-MOBILE USA, INC. 6529 CHANDLER OK
2019-04-08 580-501 T-MOBILE USA, INC. 6529 ADA OK
2019-04-08 580-643 T-MOBILE USA, INC. 6529 ALTUS OK
2019-04-04 539-216 T-MOBILE USA, INC. 6529 CHECOTAH OK
2019-04-04 539-231 T-MOBILE USA, INC. 6529 DEWEY OK
2019-04-04 539-269 T-MOBILE USA, INC. 6529 EUFAULA OK
2019-04-04 580-644 T-MOBILE USA, INC. 6529 ELK CITY OK
2019-03-28 951-503 T-MOBILE USA, INC. 6529 PERRIS CA
2019-03-21 510-988 T-MOBILE USA, INC. 6529 OKLD FRTVL CA
2019-03-20 657-375 T-MOBILE USA, INC. 6529 SANTA ANA CA
2019-03-20 657-431 T-MOBILE USA, INC. 6529 WESTMINSTR CA
2019-03-19 213-459 T-MOBILE USA, INC. 6529 LSAN DA 01 CA
2019-03-19 323-949 T-MOBILE USA, INC. 6529 MONTEBELLO CA
2019-03-19 442-306 T-MOBILE USA, INC. 6529 INDIO CA
2019-03-19 661-566 T-MOBILE USA, INC. 6529 PLDL PLDL CA
2019-03-04 573-843 T-MOBILE USA, INC. 6529 CARUTHRSVL MO
2019-02-28 858-290 T-MOBILE USA, INC. 6529 DEL MAR CA
2019-02-27 657-372 T-MOBILE USA, INC. 6529 HUNTITNBCH CA
2019-02-27 909-716 T-MOBILE USA, INC. 6529 POMONA CA
2019-02-19 530-608 T-MOBILE USA, INC. 6529 TRUCKEE CA
2019-02-15 949-550 T-MOBILE USA, INC. 6529 CAPITRNVLY CA
2019-02-06 636-829 T-MOBILE USA, INC. 6529 HIGH RIDGE MO
2019-01-31 424-420 T-MOBILE USA, INC. 6529 INGLEWOOD CA
2019-01-31 425-515 T-MOBILE USA, INC. 6529 BELLEVUE WA
2019-01-31 747-287 T-MOBILE USA, INC. 6529 RESEDA CA
2019-01-30 312-776 T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2019-01-28 720-750 T-MOBILE USA, INC. 6529 DENVER CO
2019-01-23 206-530 T-MOBILE USA, INC. 6529 SEATTLE WA
2019-01-18 669-290 T-MOBILE USA, INC. 6529 SUNNYVALE CA
2019-01-18 669-309 T-MOBILE USA, INC. 6529 SNJS SOUTH CA
2019-01-18 925-477 T-MOBILE USA, INC. 6529 ANTIOCH CA
2019-01-16 469-592 T-MOBILE USA, INC. 6529 FRISCO TX
2019-01-16 682-283 T-MOBILE USA, INC. 6529 ARLINGTON TX
2019-01-08 385-294 T-MOBILE USA, INC. 6529 OGDEN UT
2019-01-04 309-520 T-MOBILE USA, INC. 6529 ROCKISLAND IL
2019-01-04 309-553 T-MOBILE USA, INC. 6529 ROCKISLAND IL
2018-12-27 626-499 T-MOBILE USA, INC. 6529 AZUSA CA
2018-12-24 707-740 T-MOBILE USA, INC. 6529 EUREKA CA
2018-12-24 951-477 T-MOBILE USA, INC. 6529 MURRIETA CA
2018-12-17 217-920 T-MOBILE USA, INC. 6529 DANVILLE IL

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.