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
2013-10-22 312-721 T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2013-10-22 312-978 T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2013-10-22 314-755 T-MOBILE USA, INC. 6529 LADUE MO
2013-10-18 970-889 T-MOBILE USA, INC. 6529 FT COLLINS CO
2013-10-17 469-703 T-MOBILE USA, INC. 6529 FORNEY TX
2013-10-16 224-281 T-MOBILE USA, INC. 6529 ELGIN IL
2013-10-16 385-216 T-MOBILE USA, INC. 6529 SALT LAKE UT
2013-10-16 708-971 T-MOBILE USA, INC. 6529 ORLAND IL
2013-10-15 951-380 T-MOBILE USA, INC. 6529 HEMT HEMT CA
2013-10-08 262-505 T-MOBILE USA, INC. 6529 MILWAUKZN2 WI
2013-10-08 414-797 T-MOBILE USA, INC. 6529 MILWAUKZN4 WI
2013-10-07 440-469 T-MOBILE USA, INC. 6529 BEREA OH
2013-10-07 708-916 T-MOBILE USA, INC. 6529 HARVEY IL
2013-10-07 779-703 T-MOBILE USA, INC. 6529 JOLIET IL
2013-10-07 872-701 T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2013-10-07 872-703 T-MOBILE USA, INC. 6529 CHICGOZN10 IL
2013-10-03 479-312 T-MOBILE USA, INC. 6529 ALMA AR
2013-09-30 872-802 T-MOBILE USA, INC. 6529 CHICGOZN04 IL
2013-09-30 872-806 T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2013-09-30 872-808 T-MOBILE USA, INC. 6529 CHICGOZN04 IL
2013-09-26 385-626 T-MOBILE USA, INC. 6529 OGDEN UT
2013-09-26 415-610 T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2013-09-26 510-365 T-MOBILE USA, INC. 6529 OKLD BKLY CA
2013-09-26 510-480 T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2013-09-24 702-848 T-MOBILE USA, INC. 6529 LAS VEGAS NV
2013-09-23 682-802 T-MOBILE USA, INC. 6529 ARLINGTON TX
2013-09-20 224-814 T-MOBILE USA, INC. 6529 ROUND LAKE IL
2013-09-20 234-817 T-MOBILE USA, INC. 6529 AKRON OH
2013-09-20 414-249 T-MOBILE USA, INC. 6529 MILWAUKZN1 WI
2013-09-20 618-802 T-MOBILE USA, INC. 6529 GRANITE CY IL
2013-09-19 314-201 T-MOBILE USA, INC. 6529 LADUE MO
2013-09-19 314-728 T-MOBILE USA, INC. 6529 ST LOUIS MO
2013-09-13 509-919 T-MOBILE USA, INC. 6529 SPOKANE WA
2013-09-09 262-232 T-MOBILE USA, INC. 6529 WAUKESHA WI
2013-09-09 719-354 T-MOBILE USA, INC. 6529 COLORDOSPG CO
2013-09-09 720-372 T-MOBILE USA, INC. 6529 DENVER CO
2013-09-05 702-910 T-MOBILE USA, INC. 6529 LAS VEGAS NV
2013-09-05 708-737 T-MOBILE USA, INC. 6529 ORLAND IL
2013-09-05 949-247 T-MOBILE USA, INC. 6529 IRVINE CA
2013-08-29 216-801 T-MOBILE USA, INC. 6529 CLEVELAND OH
2013-08-29 316-803 T-MOBILE USA, INC. 6529 NEWTON KS
2013-08-27 216-808 T-MOBILE USA, INC. 6529 CLEVELAND OH
2013-08-22 208-982 T-MOBILE USA, INC. 6529 BOISE ID
2013-08-22 424-335 T-MOBILE USA, INC. 6529 BEVERLYHLS CA
2013-08-19 312-774 T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2013-08-19 312-818 T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2013-08-19 312-918 T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2013-08-16 951-386 T-MOBILE USA, INC. 6529 WOODCREST CA
2013-08-15 480-351 T-MOBILE USA, INC. 6529 PHOENIX AZ
2013-08-08 314-326 T-MOBILE USA, INC. 6529 ST LOUIS MO

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.