NumberResearch Membership · Data 2026-04

Recent prefix assignments

5 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 2026-04

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
2014-06-27 425-229 T-MOBILE USA, INC. 6529 BELLEVUE WA
2014-06-17 216-309 T-MOBILE USA, INC. 6529 CLEVELAND OH
2014-06-17 216-507 T-MOBILE USA, INC. 6529 CLEVELAND OH
2014-06-17 316-227 T-MOBILE USA, INC. 6529 NEWTON KS
2014-06-11 224-385 T-MOBILE USA, INC. 6529 BARRINGTON IL
2014-06-11 224-713 T-MOBILE USA, INC. 6529 ALGONQUIN IL
2014-06-11 224-817 T-MOBILE USA, INC. 6529 ALGONQUIN IL
2014-06-11 779-240 T-MOBILE USA, INC. 6529 KANKAKEE IL
2014-06-11 779-301 T-MOBILE USA, INC. 6529 KANKAKEE IL
2014-06-11 779-702 T-MOBILE USA, INC. 6529 JOLIET IL
2014-05-23 818-423 T-MOBILE USA, INC. 6529 NO HOLLYWD CA
2014-05-21 505-339 T-MOBILE USA, INC. 6529 GALLUP NM
2014-05-16 920-815 T-MOBILE USA, INC. 6529 APPLETON WI
2014-05-15 872-254 T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2014-05-15 872-307 T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2014-04-28 657-238 T-MOBILE USA, INC. 6529 CYPRESS CA
2014-04-11 626-559 T-MOBILE USA, INC. 6529 LA PUENTE CA
2014-04-11 949-531 T-MOBILE USA, INC. 6529 NEWPORTBCH CA
2014-03-31 385-528 T-MOBILE USA, INC. 6529 SALT LAKE UT
2014-03-31 808-308 T-MOBILE USA, INC. 6529 HONOLULU HI
2014-03-28 206-294 T-MOBILE USA, INC. 6529 SEATTLE WA
2014-03-28 469-901 T-MOBILE USA, INC. 6529 WAXAHACHIE TX
2014-03-28 501-415 T-MOBILE USA, INC. 6529 LONOKE AR
2014-03-28 602-802 T-MOBILE USA, INC. 6529 PHOENIX AZ
2014-03-28 915-704 T-MOBILE USA, INC. 6529 EL PASO TX
2014-03-21 209-857 T-MOBILE USA, INC. 6529 MODESTO CA
2014-03-21 818-946 T-MOBILE USA, INC. 6529 VAN NUYS CA
2014-03-21 909-441 T-MOBILE USA, INC. 6529 FONTANA CA
2014-03-20 312-478 T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2014-03-20 916-696 T-MOBILE USA, INC. 6529 SCRM NORTH CA
2014-03-20 970-294 T-MOBILE USA, INC. 6529 FT COLLINS CO
2014-03-19 501-507 T-MOBILE USA, INC. 6529 BENTON AR
2014-03-17 414-439 T-MOBILE USA, INC. 6529 MILWAUKZN1 WI
2014-03-17 708-940 T-MOBILE USA, INC. 6529 HARVEY IL
2014-03-17 872-229 T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2014-03-17 872-251 T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2014-03-17 872-252 T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2014-03-17 872-706 T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2014-03-17 872-707 T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2014-03-07 314-309 T-MOBILE USA, INC. 6529 ST LOUIS MO
2014-03-07 385-236 T-MOBILE USA, INC. 6529 PROVO UT
2014-03-07 424-324 T-MOBILE USA, INC. 6529 BEVERLYHLS CA
2014-03-06 360-932 T-MOBILE USA, INC. 6529 BREMERTON WA
2014-03-06 425-326 T-MOBILE USA, INC. 6529 BELLEVUE WA
2014-03-05 219-281 T-MOBILE USA, INC. 6529 CROWNPOINT IN
2014-03-05 224-334 T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2014-03-05 720-645 T-MOBILE USA, INC. 6529 DENVER CO
2014-03-05 970-815 T-MOBILE USA, INC. 6529 GREELEY CO
2014-03-04 915-213 T-MOBILE USA, INC. 6529 EL PASO TX
2014-03-03 219-318 T-MOBILE USA, INC. 6529 GARY IN

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 2026-04 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.