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
2019-09-30 206-586 T-MOBILE USA, INC. 6529 SEATTLE WA
2019-09-30 213-397 T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2019-09-30 213-466 T-MOBILE USA, INC. 6529 LSAN DA 05 CA
2019-09-30 213-475 T-MOBILE USA, INC. 6529 MONTEBELLO CA
2019-09-30 425-521 T-MOBILE USA, INC. 6529 EVERETT WA
2019-09-30 628-269 T-MOBILE USA, INC. 6529 SAN RAFAEL CA
2019-09-27 208-607 T-MOBILE USA, INC. 6529 IDAHOFALLS ID
2019-09-27 213-464 T-MOBILE USA, INC. 6529 LSAN DA 12 CA
2019-09-27 510-216 T-MOBILE USA, INC. 6529 OKLD FRTVL CA
2019-09-20 682-297 T-MOBILE USA, INC. 6529 ARLINGTON TX
2019-09-03 425-439 T-MOBILE USA, INC. 6529 BOTHELL WA
2019-08-27 562-410 T-MOBILE USA, INC. 6529 NORWALK CA
2019-08-27 747-279 T-MOBILE USA, INC. 6529 NO HOLLYWD CA
2019-08-23 520-380 T-MOBILE USA, INC. 6529 CASAGRANDE AZ
2019-08-21 469-679 T-MOBILE USA, INC. 6529 ENNIS TX
2019-08-21 469-686 T-MOBILE USA, INC. 6529 GRANDPRARI TX
2019-08-20 206-537 T-MOBILE USA, INC. 6529 BAINBDG IS WA
2019-08-19 669-296 T-MOBILE USA, INC. 6529 SNJS SOUTH CA
2019-08-19 949-615 T-MOBILE USA, INC. 6529 TRABUCO CA
2019-08-13 619-703 T-MOBILE USA, INC. 6529 CHULAVISTA CA
2019-08-07 424-437 T-MOBILE USA, INC. 6529 HAWTHORNE CA
2019-08-07 626-546 T-MOBILE USA, INC. 6529 ARCADIA CA
2019-08-07 949-591 T-MOBILE USA, INC. 6529 IRVINE CA
2019-08-06 385-349 T-MOBILE USA, INC. 6529 PROVO UT
2019-08-05 424-436 T-MOBILE USA, INC. 6529 SNMN SNMN CA
2019-07-26 626-517 T-MOBILE USA, INC. 6529 PSDN PSDN CA
2019-07-16 909-780 T-MOBILE USA, INC. 6529 MARSHALL CA
2019-07-09 971-354 T-MOBILE USA, INC. 6529 TILLAMOOK OR
2019-07-08 971-353 T-MOBILE USA, INC. 6529 CLACKAMAS OR
2019-07-02 682-290 T-MOBILE USA, INC. 6529 WEATHERFD TX
2019-06-25 385-326 T-MOBILE USA, INC. 6529 OGDEN UT
2019-06-25 480-572 T-MOBILE USA, INC. 6529 PHOENIX AZ
2019-06-25 531-625 T-MOBILE USA, INC. 6529 SOSIOUX CY NE
2019-06-25 720-691 T-MOBILE USA, INC. 6529 DENVER CO
2019-06-24 619-603 T-MOBILE USA, INC. 6529 NATIONALCY CA
2019-06-21 405-866 T-MOBILE USA, INC. 6529 PAULS VLY OK
2019-06-20 331-261 T-MOBILE USA, INC. 6529 LEMONT IL
2019-06-18 424-440 T-MOBILE USA, INC. 6529 W ANGELES CA
2019-05-28 209-540 T-MOBILE USA, INC. 6529 SNRA MAIN CA
2019-05-28 424-435 T-MOBILE USA, INC. 6529 TORRANCE CA
2019-05-28 510-807 T-MOBILE USA, INC. 6529 HAYWARD CA
2019-05-28 669-291 T-MOBILE USA, INC. 6529 LOS GATOS CA
2019-05-28 830-396 T-MOBILE USA, INC. 6529 KENEDY TX
2019-05-22 562-504 T-MOBILE USA, INC. 6529 WHITTIER CA
2019-05-20 206-591 T-MOBILE USA, INC. 6529 BAINBDG IS WA
2019-05-10 424-429 T-MOBILE USA, INC. 6529 CMTN CMTN CA
2019-05-06 213-462 T-MOBILE USA, INC. 6529 LSAN DA 01 CA
2019-05-06 747-313 T-MOBILE USA, INC. 6529 BRBN BRBN CA
2019-04-25 425-436 T-MOBILE USA, INC. 6529 BELLEVUE WA
2019-04-18 808-466 T-MOBILE USA, INC. 6529 HONOLULU HI

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.