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
Clear Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXAssigneeOCNRate centerState
2021-05-21 307-394 T-MOBILE USA, INC. 6529 CASPER WY
2021-05-21 619-939 T-MOBILE USA, INC. 6529 CHULAVISTA CA
2021-05-21 909-504 T-MOBILE USA, INC. 6529 CALIMESA CA
2021-05-19 385-416 T-MOBILE USA, INC. 6529 KAYSVILLE UT
2021-05-19 657-505 T-MOBILE USA, INC. 6529 ANAHEIM CA
2021-05-19 775-471 T-MOBILE USA, INC. 6529 SWEETWATER NV
2021-05-19 986-209 T-MOBILE USA, INC. 6529 KETCHUM ID
2021-05-18 405-956 T-MOBILE USA, INC. 6529 BETHANY OK
2021-05-18 442-358 T-MOBILE USA, INC. 6529 RAMONA CA
2021-05-17 916-908 T-MOBILE USA, INC. 6529 FAIR OAKS CA
2021-05-17 916-957 T-MOBILE USA, INC. 6529 SCRM MAIN CA
2021-05-14 224-384 T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2021-05-14 331-269 T-MOBILE USA, INC. 6529 AURORA IL
2021-05-14 520-543 T-MOBILE USA, INC. 6529 TUCSON AZ
2021-05-14 620-469 T-MOBILE USA, INC. 6529 ARKANSASCY KS
2021-05-14 725-248 T-MOBILE USA, INC. 6529 LAS VEGAS NV
2021-05-06 213-573 T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2021-05-06 575-260 T-MOBILE USA, INC. 6529 RUIDOSODWN NM
2021-05-04 505-481 T-MOBILE USA, INC. 6529 GALLUP NM
2021-05-04 564-210 T-MOBILE USA, INC. 6529 BREMERTON WA
2021-05-04 805-859 T-MOBILE USA, INC. 6529 ATASCADERO CA
2021-05-04 916-818 T-MOBILE USA, INC. 6529 ELK GROVE CA
2021-04-29 458-265 T-MOBILE USA, INC. 6529 WHITE CITY OR
2021-04-29 737-287 T-MOBILE USA, INC. 6529 LEANDER TX
2021-04-28 636-341 T-MOBILE USA, INC. 6529 FSSCRSTLCY MO
2021-04-28 715-971 T-MOBILE USA, INC. 6529 WAUSAU WI
2021-04-26 260-282 T-MOBILE USA, INC. 6529 ARCOLA IN
2021-04-26 575-266 T-MOBILE USA, INC. 6529 CARLSBAD NM
2021-04-24 425-534 T-MOBILE USA, INC. 6529 HALLS LAKE WA
2021-04-24 608-704 T-MOBILE USA, INC. 6529 WEST SALEM WI
2021-04-24 949-687 T-MOBILE USA, INC. 6529 CAPITRNVLY CA
2021-04-16 316-389 T-MOBILE USA, INC. 6529 EL DORADO KS
2021-04-16 509-712 T-MOBILE USA, INC. 6529 SUNNYSIDE WA
2021-04-14 262-280 T-MOBILE USA, INC. 6529 WATERFORD WI
2021-04-14 539-246 T-MOBILE USA, INC. 6529 TAHLEQUAH OK
2021-04-14 681-363 T-MOBILE USA, INC. 6529 CHRLSTNZN5 WV
2021-04-13 385-370 T-MOBILE USA, INC. 6529 OGDEN UT
2021-04-13 385-384 T-MOBILE USA, INC. 6529 PROVO UT
2021-04-13 440-694 T-MOBILE USA, INC. 6529 ASHTABULA OH
2021-04-13 513-838 T-MOBILE USA, INC. 6529 CINCINNATI OH
2021-04-12 949-665 T-MOBILE USA, INC. 6529 IRVINE CA
2021-04-12 951-629 T-MOBILE USA, INC. 6529 HEMT SNJC CA
2021-04-12 971-396 T-MOBILE USA, INC. 6529 CLACKAMAS OR
2021-04-06 213-556 T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2021-04-06 469-961 T-MOBILE USA, INC. 6529 GRANDPRARI TX
2021-04-05 909-968 T-MOBILE USA, INC. 6529 ARROWHEAD CA
2021-04-05 925-445 T-MOBILE USA, INC. 6529 ANTIOCH CA
2021-04-05 951-576 T-MOBILE USA, INC. 6529 WOODCREST CA
2021-04-05 951-580 T-MOBILE USA, INC. 6529 PERRIS CA
2021-04-02 520-504 T-MOBILE USA, INC. 6529 SIERRAVIST AZ

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.