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
2021-11-18 720-871 T-MOBILE USA, INC. 6529 LONGMONT CO
2021-11-18 817-883 T-MOBILE USA, INC. 6529 ARLINGTON TX
2021-11-18 858-330 T-MOBILE USA, INC. 6529 RNCHOPNQTS CA
2021-11-18 951-604 T-MOBILE USA, INC. 6529 HEMT SNJC CA
2021-11-17 509-986 T-MOBILE USA, INC. 6529 ELLENSBURG WA
2021-11-17 657-534 T-MOBILE USA, INC. 6529 ORANGE CA
2021-11-17 945-236 T-MOBILE USA, INC. 6529 ROCKWALL TX
2021-11-17 951-598 T-MOBILE USA, INC. 6529 ARLINGTON CA
2021-11-15 213-642 T-MOBILE USA, INC. 6529 LSAN DA 14 CA
2021-11-15 213-648 T-MOBILE USA, INC. 6529 LSAN DA 01 CA
2021-11-15 442-379 T-MOBILE USA, INC. 6529 EL CENTRO CA
2021-11-15 559-680 T-MOBILE USA, INC. 6529 FRESNO CA
2021-11-15 562-609 T-MOBILE USA, INC. 6529 ALAMITOS CA
2021-11-15 626-597 T-MOBILE USA, INC. 6529 ALHAMBRA CA
2021-11-15 650-643 T-MOBILE USA, INC. 6529 PALO ALTO CA
2021-11-15 657-739 T-MOBILE USA, INC. 6529 ANAHEIM CA
2021-11-15 661-936 T-MOBILE USA, INC. 6529 PLDL PLDL CA
2021-11-15 669-319 T-MOBILE USA, INC. 6529 SNJS WEST CA
2021-11-15 840-212 T-MOBILE USA, INC. 6529 CHINO CA
2021-11-12 602-880 T-MOBILE USA, INC. 6529 PHOENIX AZ
2021-11-12 720-896 T-MOBILE USA, INC. 6529 DENVER CO
2021-11-10 424-463 T-MOBILE USA, INC. 6529 INGLEWOOD CA
2021-11-10 747-308 T-MOBILE USA, INC. 6529 BRBN BRBN CA
2021-11-10 951-594 T-MOBILE USA, INC. 6529 MORENO CA
2021-11-09 458-277 T-MOBILE USA, INC. 6529 NEWPORT OR
2021-11-09 458-278 T-MOBILE USA, INC. 6529 ALBANY OR
2021-11-09 657-551 T-MOBILE USA, INC. 6529 WESTMINSTR CA
2021-11-09 951-597 T-MOBILE USA, INC. 6529 CORONA CA
2021-11-09 970-896 T-MOBILE USA, INC. 6529 STEAMBOSPG CO
2021-11-09 971-419 T-MOBILE USA, INC. 6529 CLACKAMAS OR
2021-11-08 314-907 T-MOBILE USA, INC. 6529 LADUE MO
2021-11-05 573-780 T-MOBILE USA, INC. 6529 STEGNVIEVE MO
2021-11-05 945-232 T-MOBILE USA, INC. 6529 GRANDPRARI TX
2021-11-05 945-233 T-MOBILE USA, INC. 6529 GRANDPRARI TX
2021-11-04 725-267 T-MOBILE USA, INC. 6529 LAS VEGAS NV
2021-11-04 725-268 T-MOBILE USA, INC. 6529 LAUGHLIN NV
2021-11-04 872-297 T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2021-11-03 206-791 T-MOBILE USA, INC. 6529 SEATTLE WA
2021-11-03 628-313 T-MOBILE USA, INC. 6529 SAN RAFAEL CA
2021-10-29 442-370 T-MOBILE USA, INC. 6529 INDIO CA
2021-10-29 618-809 T-MOBILE USA, INC. 6529 MT VERNON IL
2021-10-29 619-943 T-MOBILE USA, INC. 6529 CHULAVISTA CA
2021-10-28 213-492 T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2021-10-28 213-574 T-MOBILE USA, INC. 6529 LSAN DA 07 CA
2021-10-28 424-454 T-MOBILE USA, INC. 6529 CMTN CMTN CA
2021-10-28 425-370 T-MOBILE USA, INC. 6529 BELLEVUE WA
2021-10-28 442-364 T-MOBILE USA, INC. 6529 BRAWLEY CA
2021-10-28 661-531 T-MOBILE USA, INC. 6529 ARVIN CA
2021-10-28 840-207 T-MOBILE USA, INC. 6529 ARROWHEAD CA
2021-10-28 971-417 T-MOBILE USA, INC. 6529 PORTLAND OR

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.