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
2016-07-25 442-291 T-MOBILE USA, INC. 6529 VISTA CA
2016-07-25 909-506 T-MOBILE USA, INC. 6529 CLAREMONT CA
2016-07-22 323-530 T-MOBILE USA, INC. 6529 MONTEBELLO CA
2016-07-21 210-944 T-MOBILE USA, INC. 6529 SANANTONIO TX
2016-07-21 210-962 T-MOBILE USA, INC. 6529 SANANTONIO TX
2016-07-15 323-961 T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2016-07-15 515-723 T-MOBILE USA, INC. 6529 DES MOINES IA
2016-07-15 650-680 T-MOBILE USA, INC. 6529 LOS ALTOS CA
2016-07-15 661-593 T-MOBILE USA, INC. 6529 SNCA NHCS CA
2016-07-15 928-256 T-MOBILE USA, INC. 6529 YUMA AZ
2016-07-13 216-760 T-MOBILE USA, INC. 6529 CLEVELAND OH
2016-07-13 331-757 T-MOBILE USA, INC. 6529 LEMONT IL
2016-07-13 702-890 T-MOBILE USA, INC. 6529 LAS VEGAS NV
2016-07-13 708-882 T-MOBILE USA, INC. 6529 CHICAGOHTS IL
2016-07-13 872-757 T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2016-07-12 872-310 T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2016-07-01 559-214 T-MOBILE USA, INC. 6529 FRESNO CA
2016-07-01 628-204 T-MOBILE USA, INC. 6529 NICASIO CA
2016-07-01 628-241 T-MOBILE USA, INC. 6529 SNFC JUNPR CA
2016-07-01 628-252 T-MOBILE USA, INC. 6529 CORTEMADRA CA
2016-06-29 619-513 T-MOBILE USA, INC. 6529 CHULAVISTA CA
2016-06-29 657-341 T-MOBILE USA, INC. 6529 BREA CA
2016-06-29 951-484 T-MOBILE USA, INC. 6529 HEMT HEMT CA
2016-06-28 424-366 T-MOBILE USA, INC. 6529 CMTN CMTN CA
2016-06-28 909-550 T-MOBILE USA, INC. 6529 FONTANA CA
2016-06-27 602-632 T-MOBILE USA, INC. 6529 PHOENIX AZ
2016-06-17 312-826 T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2016-06-17 657-335 T-MOBILE USA, INC. 6529 SANTA ANA CA
2016-06-17 775-300 T-MOBILE USA, INC. 6529 RENO NV
2016-06-17 808-773 T-MOBILE USA, INC. 6529 HONOLULU HI
2016-06-17 909-490 T-MOBILE USA, INC. 6529 ONTARIO CA
2016-06-14 510-890 T-MOBILE USA, INC. 6529 RICHMOND CA
2016-06-13 480-462 T-MOBILE USA, INC. 6529 PHOENIX AZ
2016-06-10 442-294 T-MOBILE USA, INC. 6529 RIDGECREST CA
2016-06-10 509-907 T-MOBILE USA, INC. 6529 YAKIMA WA
2016-06-10 510-993 T-MOBILE USA, INC. 6529 OKLD BKLY CA
2016-06-10 657-334 T-MOBILE USA, INC. 6529 WESTMINSTR CA
2016-06-09 928-250 T-MOBILE USA, INC. 6529 SAFFORD AZ
2016-05-25 440-904 T-MOBILE USA, INC. 6529 E CLARIDON OH
2016-05-25 937-991 T-MOBILE USA, INC. 6529 DAYTON OH
2016-05-24 206-483 T-MOBILE USA, INC. 6529 SEATTLE WA
2016-05-24 209-280 T-MOBILE USA, INC. 6529 LODI CA
2016-05-24 661-365 T-MOBILE USA, INC. 6529 PLDL PLDL CA
2016-05-24 909-601 T-MOBILE USA, INC. 6529 S BERNDINO CA
2016-05-16 209-278 T-MOBILE USA, INC. 6529 TRACY CA
2016-05-16 916-280 T-MOBILE USA, INC. 6529 ELK GROVE CA
2016-05-16 971-401 T-MOBILE USA, INC. 6529 PORTLAND OR
2016-05-13 702-934 T-MOBILE USA, INC. 6529 LAS VEGAS NV
2016-05-12 253-257 T-MOBILE USA, INC. 6529 TACOMAWVLY WA
2016-05-12 425-240 T-MOBILE USA, INC. 6529 BELLEVUE WA

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.