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
2020-03-31 501-409 T-MOBILE USA, INC. 6529 BENTON AR
2020-03-31 720-704 T-MOBILE USA, INC. 6529 DENVER CO
2020-03-27 213-376 T-MOBILE USA, INC. 6529 LSAN DA 11 CA
2020-03-27 213-398 T-MOBILE USA, INC. 6529 LSAN DA 13 CA
2020-03-27 213-420 T-MOBILE USA, INC. 6529 MONTEBELLO CA
2020-03-26 360-206 T-MOBILE USA, INC. 6529 CENTRALIA WA
2020-03-25 213-469 T-MOBILE USA, INC. 6529 LSAN DA 04 CA
2020-03-24 385-341 T-MOBILE USA, INC. 6529 SALT LAKE UT
2020-03-24 720-694 T-MOBILE USA, INC. 6529 DENVER CO
2020-03-20 619-650 T-MOBILE USA, INC. 6529 CHULAVISTA CA
2020-03-18 253-316 T-MOBILE USA, INC. 6529 TACOMAWVLY WA
2020-03-10 405-856 T-MOBILE USA, INC. 6529 EDMOND OK
2020-03-10 405-868 T-MOBILE USA, INC. 6529 BETHANY OK
2020-02-28 951-519 T-MOBILE USA, INC. 6529 TEMSCL CNY CA
2020-02-19 469-793 T-MOBILE USA, INC. 6529 MCKINNEY TX
2020-02-05 213-414 T-MOBILE USA, INC. 6529 LSAN DA 07 CA
2020-02-05 424-415 T-MOBILE USA, INC. 6529 CMTN GRDN CA
2020-02-05 562-459 T-MOBILE USA, INC. 6529 DOWNEY CA
2020-01-28 254-370 T-MOBILE USA, INC. 6529 KILLEEN TX
2020-01-15 669-279 T-MOBILE USA, INC. 6529 CAMPBELL CA
2020-01-15 818-873 T-MOBILE USA, INC. 6529 LACRSCENTA CA
2020-01-14 253-317 T-MOBILE USA, INC. 6529 TACOMA WA
2020-01-14 469-756 T-MOBILE USA, INC. 6529 FRISCO TX
2020-01-14 480-604 T-MOBILE USA, INC. 6529 PHOENIX AZ
2020-01-13 707-727 T-MOBILE USA, INC. 6529 UKIAH CA
2020-01-10 442-307 T-MOBILE USA, INC. 6529 INDIO CA
2020-01-10 951-480 T-MOBILE USA, INC. 6529 HEMT HEMT CA
2020-01-09 360-919 T-MOBILE USA, INC. 6529 BREMERTON WA
2020-01-09 425-465 T-MOBILE USA, INC. 6529 ISSAQUAH WA
2020-01-09 719-420 T-MOBILE USA, INC. 6529 PUEBLO CO
2020-01-09 720-751 T-MOBILE USA, INC. 6529 DENVER CO
2020-01-08 872-258 T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2019-12-19 385-310 T-MOBILE USA, INC. 6529 KAYSVILLE UT
2019-12-09 209-582 T-MOBILE USA, INC. 6529 ATWATER CA
2019-11-19 720-687 T-MOBILE USA, INC. 6529 DENVER CO
2019-11-08 213-468 T-MOBILE USA, INC. 6529 LSAN DA 13 CA
2019-11-08 510-767 T-MOBILE USA, INC. 6529 FRNK MAIN CA
2019-10-25 650-507 T-MOBILE USA, INC. 6529 PALO ALTO CA
2019-10-23 708-685 T-MOBILE USA, INC. 6529 LA GRANGE IL
2019-10-18 209-494 T-MOBILE USA, INC. 6529 MODESTO CA
2019-10-17 469-743 T-MOBILE USA, INC. 6529 MIDLOTHIAN TX
2019-10-16 385-306 T-MOBILE USA, INC. 6529 KAYSVILLE UT
2019-10-16 510-630 T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2019-10-11 469-836 T-MOBILE USA, INC. 6529 GRANDPRARI TX
2019-10-11 682-306 T-MOBILE USA, INC. 6529 ARLINGTON TX
2019-10-09 469-783 T-MOBILE USA, INC. 6529 GRANDPRARI TX
2019-10-07 469-739 T-MOBILE USA, INC. 6529 GRANDPRARI TX
2019-10-07 682-298 T-MOBILE USA, INC. 6529 ARLINGTON TX
2019-10-03 602-691 T-MOBILE USA, INC. 6529 PHOENIX AZ
2019-10-01 360-995 T-MOBILE USA, INC. 6529 OLYMPIA WA

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.