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
509-310 T-MOBILE USA, INC. 6529 WH SALMON WA
509-342 T-MOBILE USA, INC. 6529 SPOKANE WA
509-361 T-MOBILE USA, INC. 6529 MOSES LAKE WA
509-370 T-MOBILE USA, INC. 6529 SPOKANE WA
509-391 T-MOBILE USA, INC. 6529 SUNNYSIDE WA
509-428 T-MOBILE USA, INC. 6529 RITZVILLE WA
509-432 T-MOBILE USA, INC. 6529 PULLMAN WA
509-475 T-MOBILE USA, INC. 6529 SPOKANE WA
509-550 T-MOBILE USA, INC. 6529 NEWPORT WA
509-552 T-MOBILE USA, INC. 6529 CLARKSTON WA
509-553 T-MOBILE USA, INC. 6529 COLFAX WA
509-701 T-MOBILE USA, INC. 6529 SPOKANE WA
509-714 T-MOBILE USA, INC. 6529 SPOKANE WA
509-727 T-MOBILE USA, INC. 6529 KENNEWICK WA
509-728 T-MOBILE USA, INC. 6529 YAKIMA WA
509-768 T-MOBILE USA, INC. 6529 SPOKANE WA
509-771 T-MOBILE USA, INC. 6529 MOSES LAKE WA
509-868 T-MOBILE USA, INC. 6529 SPOKANE WA
509-869 T-MOBILE USA, INC. 6529 SPOKANE WA
509-879 T-MOBILE USA, INC. 6529 SPOKANE WA
509-901 T-MOBILE USA, INC. 6529 YAKIMA WA
509-910 T-MOBILE USA, INC. 6529 YAKIMA WA
510-290 T-MOBILE USA, INC. 6529 OKLD MN-PD CA
510-377 T-MOBILE USA, INC. 6529 FRNK MAIN CA
510-385 T-MOBILE USA, INC. 6529 OKLD MN-PD CA
510-393 T-MOBILE USA, INC. 6529 OKLD MN-PD CA
510-435 T-MOBILE USA, INC. 6529 OKLD MN-PD CA
510-459 T-MOBILE USA, INC. 6529 OKLD MN-PD CA
510-512 T-MOBILE USA, INC. 6529 HAYWARD CA
510-565 T-MOBILE USA, INC. 6529 FRNK MAIN CA
510-688 T-MOBILE USA, INC. 6529 HAYWARD CA
510-714 T-MOBILE USA, INC. 6529 FRNK MAIN CA
510-773 T-MOBILE USA, INC. 6529 OKLD MN-PD CA
510-774 T-MOBILE USA, INC. 6529 OKLD MN-PD CA
510-804 T-MOBILE USA, INC. 6529 ELSBR-PINL CA
510-815 T-MOBILE USA, INC. 6529 ELSBR-PINL CA
510-823 T-MOBILE USA, INC. 6529 OKLD MN-PD CA
510-867 T-MOBILE USA, INC. 6529 OKLD MN-PD CA
512-200 T-MOBILE USA, INC. 6529 AUSTIN TX
512-293 T-MOBILE USA, INC. 6529 AUSTIN TX
512-294 T-MOBILE USA, INC. 6529 AUSTIN TX
512-296 T-MOBILE USA, INC. 6529 AUSTIN TX
512-297 T-MOBILE USA, INC. 6529 AUSTIN TX
512-350 T-MOBILE USA, INC. 6529 AUSTIN TX
512-400 T-MOBILE USA, INC. 6529 BUDA TX
512-507 T-MOBILE USA, INC. 6529 AUSTIN TX
512-508 T-MOBILE USA, INC. 6529 GEORGETOWN TX
512-521 T-MOBILE USA, INC. 6529 BASTROP TX
512-525 T-MOBILE USA, INC. 6529 LAMPASAS TX
512-554 T-MOBILE USA, INC. 6529 AUSTIN TX

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.