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
2021-04-01 513-764 T-MOBILE USA, INC. 6529 CINCINNATI OH
2021-03-31 562-939 T-MOBILE USA, INC. 6529 ALAMITOS CA
2021-03-25 602-837 T-MOBILE USA, INC. 6529 PHOENIX AZ
2021-03-25 623-268 T-MOBILE USA, INC. 6529 PHOENIX AZ
2021-03-24 213-583 T-MOBILE USA, INC. 6529 LSAN DA 13 CA
2021-03-24 442-355 T-MOBILE USA, INC. 6529 ESCONDIDO CA
2021-03-24 831-266 T-MOBILE USA, INC. 6529 SANTA CRUZ CA
2021-03-24 858-319 T-MOBILE USA, INC. 6529 LA JOLLA CA
2021-03-23 681-369 T-MOBILE USA, INC. 6529 MULLENS WV
2021-03-22 626-561 T-MOBILE USA, INC. 6529 ALHAMBRA CA
2021-03-19 424-448 T-MOBILE USA, INC. 6529 BEVERLYHLS CA
2021-03-19 937-794 T-MOBILE USA, INC. 6529 PIQUA OH
2021-03-18 209-889 T-MOBILE USA, INC. 6529 STOCKTON CA
2021-03-18 213-554 T-MOBILE USA, INC. 6529 LSAN DA 10 CA
2021-03-18 253-346 T-MOBILE USA, INC. 6529 TACOMA WA
2021-03-18 432-306 T-MOBILE USA, INC. 6529 BIG SPRING TX
2021-03-18 458-262 T-MOBILE USA, INC. 6529 ALBANY OR
2021-03-17 619-907 T-MOBILE USA, INC. 6529 SNDG SNDG CA
2021-03-11 442-354 T-MOBILE USA, INC. 6529 BRAWLEY CA
2021-03-11 505-457 T-MOBILE USA, INC. 6529 GALLUP NM
2021-03-11 820-203 T-MOBILE USA, INC. 6529 ATASCADERO CA
2021-03-11 858-313 T-MOBILE USA, INC. 6529 DEL MAR CA
2021-03-10 213-497 T-MOBILE USA, INC. 6529 LSAN DA 05 CA
2021-03-10 858-308 T-MOBILE USA, INC. 6529 SNDG LVTA CA
2021-03-09 915-273 T-MOBILE USA, INC. 6529 EL PASO TX
2021-03-05 480-743 T-MOBILE USA, INC. 6529 PHOENIX AZ
2021-03-05 720-804 T-MOBILE USA, INC. 6529 LONGMONT CO
2021-03-04 213-551 T-MOBILE USA, INC. 6529 LSAN DA 07 CA
2021-03-04 510-916 T-MOBILE USA, INC. 6529 OKLD TRNID CA
2021-03-04 619-918 T-MOBILE USA, INC. 6529 NATIONALCY CA
2021-03-03 562-550 T-MOBILE USA, INC. 6529 WHITTIER CA
2021-03-03 971-395 T-MOBILE USA, INC. 6529 SEASIDE OR
2021-03-02 458-260 T-MOBILE USA, INC. 6529 BROOKINGS OR
2021-03-02 509-610 T-MOBILE USA, INC. 6529 COLFAX WA
2021-02-28 626-558 T-MOBILE USA, INC. 6529 ALHAMBRA CA
2021-02-25 210-956 T-MOBILE USA, INC. 6529 SANANTONIO TX
2021-02-25 425-517 T-MOBILE USA, INC. 6529 RENTON WA
2021-02-25 510-973 T-MOBILE USA, INC. 6529 OKLD BKLY CA
2021-02-25 619-657 T-MOBILE USA, INC. 6529 LA MESA CA
2021-02-25 619-707 T-MOBILE USA, INC. 6529 SNDG SNDG CA
2021-02-25 707-858 T-MOBILE USA, INC. 6529 SANTA ROSA CA
2021-02-25 916-707 T-MOBILE USA, INC. 6529 SCRM MAIN CA
2021-02-24 562-542 T-MOBILE USA, INC. 6529 LONG BEACH CA
2021-02-24 619-904 T-MOBILE USA, INC. 6529 CHULAVISTA CA
2021-02-19 951-578 T-MOBILE USA, INC. 6529 ARLINGTON CA
2021-02-17 858-305 T-MOBILE USA, INC. 6529 SNDG MRMS CA
2021-02-16 509-516 T-MOBILE USA, INC. 6529 WALLAWALLA WA
2021-02-16 564-209 T-MOBILE USA, INC. 6529 WHATCOMCTY WA
2021-02-16 661-627 T-MOBILE USA, INC. 6529 SNCA NHCS CA
2021-02-16 970-501 T-MOBILE USA, INC. 6529 DURANGO CO

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.