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
2013-05-28 219-315 T-MOBILE USA, INC. 6529 E CHICAGO IN
2013-05-28 219-316 T-MOBILE USA, INC. 6529 E CHICAGO IN
2013-05-24 224-409 T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2013-05-24 224-410 T-MOBILE USA, INC. 6529 ALGONQUIN IL
2013-05-24 312-647 T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2013-05-24 312-709 T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2013-05-24 859-878 T-MOBILE USA, INC. 6529 COVINGTON KY
2013-05-24 872-218 T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2013-05-24 872-303 T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2013-05-24 872-305 T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2013-05-23 314-319 T-MOBILE USA, INC. 6529 ST LOUIS MO
2013-05-23 405-404 T-MOBILE USA, INC. 6529 CHANDLER OK
2013-05-22 719-453 T-MOBILE USA, INC. 6529 COLORDOSPG CO
2013-05-20 971-320 T-MOBILE USA, INC. 6529 SEASIDE OR
2013-05-16 424-332 T-MOBILE USA, INC. 6529 BEVERLYHLS CA
2013-05-16 510-362 T-MOBILE USA, INC. 6529 HAYWARD CA
2013-05-06 209-276 T-MOBILE USA, INC. 6529 ATWATER CA
2013-05-01 708-830 T-MOBILE USA, INC. 6529 LA GRANGE IL
2013-05-01 872-801 T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2013-05-01 872-803 T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2013-04-30 405-339 T-MOBILE USA, INC. 6529 ANADARKO OK
2013-04-30 720-589 T-MOBILE USA, INC. 6529 DENVER CO
2013-04-25 414-595 T-MOBILE USA, INC. 6529 MILWAUKZN1 WI
2013-04-25 414-865 T-MOBILE USA, INC. 6529 MILWAUKZN4 WI
2013-04-24 951-376 T-MOBILE USA, INC. 6529 ARLINGTON CA
2013-04-23 580-500 T-MOBILE USA, INC. 6529 CLINTON OK
2013-04-19 314-203 T-MOBILE USA, INC. 6529 ST LOUIS MO
2013-04-19 314-585 T-MOBILE USA, INC. 6529 LADUE MO
2013-04-19 520-499 T-MOBILE USA, INC. 6529 TUCSON AZ
2013-04-19 925-428 T-MOBILE USA, INC. 6529 ANTIOCH CA
2013-04-18 224-247 T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2013-04-18 224-427 T-MOBILE USA, INC. 6529 BARRINGTON IL
2013-04-18 331-245 T-MOBILE USA, INC. 6529 BARTLETT IL
2013-04-18 702-728 T-MOBILE USA, INC. 6529 LAS VEGAS NV
2013-04-18 708-571 T-MOBILE USA, INC. 6529 LA GRANGE IL
2013-04-18 708-673 T-MOBILE USA, INC. 6529 CHICAGOHTS IL
2013-04-18 872-210 T-MOBILE USA, INC. 6529 CHICGOZN04 IL
2013-04-18 872-214 T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2013-04-18 872-301 T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2013-04-16 719-551 T-MOBILE USA, INC. 6529 COLORDOSPG CO
2013-04-15 425-209 T-MOBILE USA, INC. 6529 BELLEVUE WA
2013-04-05 575-404 T-MOBILE USA, INC. 6529 ALAMOGORDO NM
2013-04-02 720-525 T-MOBILE USA, INC. 6529 DENVER CO
2013-03-13 469-510 T-MOBILE USA, INC. 6529 GRANDPRARI TX
2013-03-11 937-818 T-MOBILE USA, INC. 6529 DAYTON OH
2013-02-27 602-545 T-MOBILE USA, INC. 6529 PHOENIX AZ
2013-02-27 602-785 T-MOBILE USA, INC. 6529 PHOENIX AZ
2013-02-27 602-921 T-MOBILE USA, INC. 6529 PHOENIX AZ
2013-02-25 469-509 T-MOBILE USA, INC. 6529 GRANDPRARI TX
2013-02-22 210-763 T-MOBILE USA, INC. 6529 SANANTONIO TX

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.