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
2010-08-20 872-333 T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2010-08-13 480-719 T-MOBILE USA, INC. 6529 PHOENIX AZ
2010-08-12 630-538 T-MOBILE USA, INC. 6529 SUGARGROVE IL
2010-08-06 720-325 T-MOBILE USA, INC. 6529 DENVER CO
2010-08-06 806-400 T-MOBILE USA, INC. 6529 AMARILLO TX
2010-08-06 920-903 T-MOBILE USA, INC. 6529 APPLETON WI
2010-08-04 702-534 T-MOBILE USA, INC. 6529 LAS VEGAS NV
2010-07-30 618-504 T-MOBILE USA, INC. 6529 WATERLOO IL
2010-07-23 435-314 T-MOBILE USA, INC. 6529 EPHRAIM UT
2010-07-23 928-514 T-MOBILE USA, INC. 6529 BULLHEADCY AZ
2010-07-20 708-252 T-MOBILE USA, INC. 6529 CHICAGOHTS IL
2010-07-19 479-358 T-MOBILE USA, INC. 6529 FORT SMITH AR
2010-06-24 630-506 T-MOBILE USA, INC. 6529 AURORA IL
2010-06-17 806-471 T-MOBILE USA, INC. 6529 AMARILLO TX
2010-06-17 830-383 T-MOBILE USA, INC. 6529 FREDECKSBG TX
2010-06-17 940-273 T-MOBILE USA, INC. 6529 DECATUR TX
2010-06-16 830-353 T-MOBILE USA, INC. 6529 KERRVILLE TX
2010-05-18 657-206 T-MOBILE USA, INC. 6529 GARDEN GRV CA
2010-05-11 903-787 T-MOBILE USA, INC. 6529 TYLER TX
2010-04-22 385-208 T-MOBILE USA, INC. 6529 PROVO UT
2010-03-30 408-659 T-MOBILE USA, INC. 6529 MORGANHILL CA
2010-03-30 801-903 T-MOBILE USA, INC. 6529 SALT LAKE UT
2010-03-19 505-225 T-MOBILE USA, INC. 6529 ALBUQURQUE NM
2010-03-16 575-777 T-MOBILE USA, INC. 6529 CLOVIS NM
2010-03-15 480-745 T-MOBILE USA, INC. 6529 PHOENIX AZ
2010-03-15 928-259 T-MOBILE USA, INC. 6529 YUMA AZ
2010-02-23 801-882 T-MOBILE USA, INC. 6529 KAYSVILLE UT
2010-01-25 682-239 T-MOBILE USA, INC. 6529 WEATHERFD TX
2010-01-06 575-268 T-MOBILE USA, INC. 6529 CLOVIS NM
2009-12-17 951-703 T-MOBILE USA, INC. 6529 MIRA LOMA CA
2009-11-30 951-525 T-MOBILE USA, INC. 6529 ARLINGTON CA
2009-11-06 541-656 T-MOBILE USA, INC. 6529 HERMISTON OR
2009-10-28 608-515 T-MOBILE USA, INC. 6529 MADISON WI
2009-10-16 330-999 T-MOBILE USA, INC. 6529 AKRON OH
2009-10-09 513-208 T-MOBILE USA, INC. 6529 CINCINNATI OH
2009-10-09 513-223 T-MOBILE USA, INC. 6529 CINCINNATI OH
2009-10-09 513-250 T-MOBILE USA, INC. 6529 CINCINNATI OH
2009-10-07 440-381 T-MOBILE USA, INC. 6529 ASHTABULA OH
2009-10-02 623-432 T-MOBILE USA, INC. 6529 PHOENIX AZ
2009-09-30 330-617 T-MOBILE USA, INC. 6529 CANTON OH
2009-09-30 330-906 T-MOBILE USA, INC. 6529 AKRON OH
2009-09-22 440-723 T-MOBILE USA, INC. 6529 ELYRIA OH
2009-09-22 513-655 T-MOBILE USA, INC. 6529 CINCINNATI OH
2009-09-17 480-352 T-MOBILE USA, INC. 6529 PHOENIX AZ
2009-08-18 903-336 T-MOBILE USA, INC. 6529 TEXARKANA TX
2009-07-01 773-554 T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2009-06-26 773-236 T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2009-05-28 325-300 T-MOBILE USA, INC. 6529 SAN ANGELO TX
2009-05-27 509-440 T-MOBILE USA, INC. 6529 KENNEWICK WA
2009-05-05 618-823 T-MOBILE USA, INC. 6529 GRANITE CY IL

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.