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
2016-11-21 206-503 T-MOBILE USA, INC. 6529 SEATTLE WA
2016-11-21 209-905 T-MOBILE USA, INC. 6529 STOCKTON CA
2016-11-21 213-431 T-MOBILE USA, INC. 6529 LSAN DA 07 CA
2016-11-21 909-530 T-MOBILE USA, INC. 6529 ARROWHEAD CA
2016-11-16 682-414 T-MOBILE USA, INC. 6529 ARLINGTON TX
2016-11-16 779-915 T-MOBILE USA, INC. 6529 WOODSTOCK IL
2016-11-15 562-471 T-MOBILE USA, INC. 6529 LONG BEACH CA
2016-11-15 951-418 T-MOBILE USA, INC. 6529 PERRIS CA
2016-11-14 425-589 T-MOBILE USA, INC. 6529 BELLEVUE WA
2016-11-14 562-306 T-MOBILE USA, INC. 6529 DOWNEY CA
2016-11-14 661-314 T-MOBILE USA, INC. 6529 BKFD MAIN CA
2016-11-14 747-260 T-MOBILE USA, INC. 6529 SNFN SNFN CA
2016-11-11 224-421 T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2016-11-11 224-428 T-MOBILE USA, INC. 6529 ALGONQUIN IL
2016-11-11 323-994 T-MOBILE USA, INC. 6529 LSAN DA 14 CA
2016-11-11 626-413 T-MOBILE USA, INC. 6529 LA PUENTE CA
2016-11-11 626-426 T-MOBILE USA, INC. 6529 COVINA CA
2016-11-10 702-844 T-MOBILE USA, INC. 6529 LAS VEGAS NV
2016-11-07 669-215 T-MOBILE USA, INC. 6529 SUNNYVALE CA
2016-11-04 747-276 T-MOBILE USA, INC. 6529 VAN NUYS CA
2016-11-03 469-984 T-MOBILE USA, INC. 6529 GRANDPRARI TX
2016-11-02 424-403 T-MOBILE USA, INC. 6529 CMTN CMTN CA
2016-11-02 657-351 T-MOBILE USA, INC. 6529 SILVERADO CA
2016-11-02 737-414 T-MOBILE USA, INC. 6529 BUDA TX
2016-11-02 909-442 T-MOBILE USA, INC. 6529 RIALTO CA
2016-11-01 385-515 T-MOBILE USA, INC. 6529 KAYSVILLE UT
2016-10-24 619-558 T-MOBILE USA, INC. 6529 EL CAJON CA
2016-10-24 916-713 T-MOBILE USA, INC. 6529 SCRM NORTH CA
2016-10-21 510-822 T-MOBILE USA, INC. 6529 OKLD TRNID CA
2016-10-18 323-831 T-MOBILE USA, INC. 6529 LSAN DA 05 CA
2016-10-18 619-622 T-MOBILE USA, INC. 6529 CHULAVISTA CA
2016-10-10 442-230 T-MOBILE USA, INC. 6529 BRAWLEY CA
2016-10-10 951-497 T-MOBILE USA, INC. 6529 MORENO CA
2016-10-07 509-405 T-MOBILE USA, INC. 6529 KENNEWICK WA
2016-10-07 909-688 T-MOBILE USA, INC. 6529 FONTANA CA
2016-10-06 505-387 T-MOBILE USA, INC. 6529 GALLUP NM
2016-09-28 682-246 T-MOBILE USA, INC. 6529 ARLINGTON TX
2016-09-26 323-925 T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2016-09-26 510-570 T-MOBILE USA, INC. 6529 OKLD BKLY CA
2016-09-26 669-285 T-MOBILE USA, INC. 6529 SNJS SOUTH CA
2016-09-26 909-751 T-MOBILE USA, INC. 6529 S BERNDINO CA
2016-09-26 916-345 T-MOBILE USA, INC. 6529 SCRM NORTH CA
2016-09-21 360-728 T-MOBILE USA, INC. 6529 BREMERTON WA
2016-09-21 424-421 T-MOBILE USA, INC. 6529 BEVERLYHLS CA
2016-09-21 442-297 T-MOBILE USA, INC. 6529 EL CENTRO CA
2016-09-21 650-476 T-MOBILE USA, INC. 6529 HALFMOONBY CA
2016-09-21 657-346 T-MOBILE USA, INC. 6529 SANTA ANA CA
2016-09-21 669-213 T-MOBILE USA, INC. 6529 SNJS NORTH CA
2016-09-21 682-408 T-MOBILE USA, INC. 6529 ARLINGTON TX
2016-09-16 619-340 T-MOBILE USA, INC. 6529 LA MESA 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.