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
2011-03-14 872-600 T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2011-03-07 509-759 T-MOBILE USA, INC. 6529 YAKIMA WA
2011-03-03 224-733 T-MOBILE USA, INC. 6529 WAUKEGAN IL
2011-03-03 224-800 T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2011-03-03 702-601 T-MOBILE USA, INC. 6529 LAS VEGAS NV
2011-03-02 515-318 T-MOBILE USA, INC. 6529 DES MOINES IA
2011-02-28 262-955 T-MOBILE USA, INC. 6529 WAUKESHA WI
2011-02-25 414-366 T-MOBILE USA, INC. 6529 MILWAUKZN1 WI
2011-02-25 513-568 T-MOBILE USA, INC. 6529 CINCINNATI OH
2011-02-24 773-949 T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2011-02-23 513-888 T-MOBILE USA, INC. 6529 CINCINNATI OH
2011-02-22 801-900 T-MOBILE USA, INC. 6529 PROVO UT
2011-02-18 773-993 T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2011-02-17 779-300 T-MOBILE USA, INC. 6529 ROCKFORD IL
2011-02-10 224-600 T-MOBILE USA, INC. 6529 ALGONQUIN IL
2011-02-02 425-623 T-MOBILE USA, INC. 6529 BELLEVUE WA
2011-01-31 414-233 T-MOBILE USA, INC. 6529 MILWAUKZN1 WI
2011-01-31 414-484 T-MOBILE USA, INC. 6529 MILWAUKZN1 WI
2011-01-31 414-499 T-MOBILE USA, INC. 6529 MILWAUKZN1 WI
2011-01-31 414-739 T-MOBILE USA, INC. 6529 MILWAUKZN1 WI
2011-01-31 801-970 T-MOBILE USA, INC. 6529 SALT LAKE UT
2011-01-27 435-525 T-MOBILE USA, INC. 6529 ST GEORGE UT
2011-01-26 408-680 T-MOBILE USA, INC. 6529 CAMPBELL CA
2011-01-19 801-500 T-MOBILE USA, INC. 6529 PROVO UT
2011-01-10 760-879 T-MOBILE USA, INC. 6529 EL CENTRO CA
2010-12-23 801-875 T-MOBILE USA, INC. 6529 SALT LAKE UT
2010-12-23 801-960 T-MOBILE USA, INC. 6529 PROVO UT
2010-12-21 801-888 T-MOBILE USA, INC. 6529 KAYSVILLE UT
2010-12-15 513-400 T-MOBILE USA, INC. 6529 CINCINNATI OH
2010-12-13 559-203 T-MOBILE USA, INC. 6529 CLOVIS CA
2010-12-13 702-981 T-MOBILE USA, INC. 6529 LAS VEGAS NV
2010-12-08 515-612 T-MOBILE USA, INC. 6529 DES MOINES IA
2010-12-02 775-400 T-MOBILE USA, INC. 6529 CARSONCITY NV
2010-11-26 415-815 T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2010-11-11 385-628 T-MOBILE USA, INC. 6529 SALT LAKE UT
2010-11-10 719-452 T-MOBILE USA, INC. 6529 COLORDOSPG CO
2010-10-28 720-400 T-MOBILE USA, INC. 6529 DENVER CO
2010-10-25 414-949 T-MOBILE USA, INC. 6529 MILWAUKZN1 WI
2010-10-20 309-340 T-MOBILE USA, INC. 6529 PEORIA IL
2010-10-19 209-701 T-MOBILE USA, INC. 6529 ESCALON CA
2010-10-05 708-501 T-MOBILE USA, INC. 6529 HARVEY IL
2010-10-04 224-276 T-MOBILE USA, INC. 6529 ELGIN IL
2010-09-21 909-283 T-MOBILE USA, INC. 6529 REDLANDS CA
2010-09-20 425-633 T-MOBILE USA, INC. 6529 BELLEVUE WA
2010-09-17 626-560 T-MOBILE USA, INC. 6529 ALHAMBRA CA
2010-09-03 773-943 T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2010-08-31 773-916 T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2010-08-30 408-791 T-MOBILE USA, INC. 6529 SNJS NORTH CA
2010-08-24 505-399 T-MOBILE USA, INC. 6529 GALLUP NM
2010-08-23 818-561 T-MOBILE USA, INC. 6529 BRBN BRBN CA

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.