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
2016-09-14 505-737 T-MOBILE USA, INC. 6529 ALBUQURQUE NM
2016-09-14 520-274 T-MOBILE USA, INC. 6529 TUCSON AZ
2016-09-14 520-402 T-MOBILE USA, INC. 6529 BENSON AZ
2016-09-13 312-684 T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2016-09-13 312-687 T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2016-09-13 708-852 T-MOBILE USA, INC. 6529 CHICAGOHTS IL
2016-09-13 708-875 T-MOBILE USA, INC. 6529 HARVEY IL
2016-09-08 602-775 T-MOBILE USA, INC. 6529 PHOENIX AZ
2016-09-02 209-641 T-MOBILE USA, INC. 6529 STOCKTON CA
2016-09-01 539-286 T-MOBILE USA, INC. 6529 OKMULGEE OK
2016-08-31 405-480 T-MOBILE USA, INC. 6529 ANADARKO OK
2016-08-31 424-537 T-MOBILE USA, INC. 6529 SNMN MRVS CA
2016-08-31 425-362 T-MOBILE USA, INC. 6529 BELLEVUE WA
2016-08-31 559-207 T-MOBILE USA, INC. 6529 CLOVIS CA
2016-08-30 510-513 T-MOBILE USA, INC. 6529 FRNK MAIN CA
2016-08-30 559-371 T-MOBILE USA, INC. 6529 FRESNO CA
2016-08-30 626-491 T-MOBILE USA, INC. 6529 PSDN PSDN CA
2016-08-30 650-447 T-MOBILE USA, INC. 6529 MT VIEW CA
2016-08-30 657-340 T-MOBILE USA, INC. 6529 WESTMINSTR CA
2016-08-30 669-278 T-MOBILE USA, INC. 6529 CAMPBELL CA
2016-08-30 925-436 T-MOBILE USA, INC. 6529 ANTIOCH CA
2016-08-29 424-390 T-MOBILE USA, INC. 6529 REDONDO CA
2016-08-29 661-416 T-MOBILE USA, INC. 6529 ARVIN CA
2016-08-26 209-360 T-MOBILE USA, INC. 6529 MODESTO CA
2016-08-26 619-480 T-MOBILE USA, INC. 6529 NATIONALCY CA
2016-08-26 657-345 T-MOBILE USA, INC. 6529 YORBALINDA CA
2016-08-26 702-849 T-MOBILE USA, INC. 6529 MESQUITE NV
2016-08-26 747-267 T-MOBILE USA, INC. 6529 RESEDA CA
2016-08-26 747-274 T-MOBILE USA, INC. 6529 SNFN PACM CA
2016-08-25 702-695 T-MOBILE USA, INC. 6529 LAS VEGAS NV
2016-08-23 331-707 T-MOBILE USA, INC. 6529 AURORA IL
2016-08-23 682-812 T-MOBILE USA, INC. 6529 ARLINGTON TX
2016-08-23 719-308 T-MOBILE USA, INC. 6529 COLORDOSPG CO
2016-08-23 720-546 T-MOBILE USA, INC. 6529 DENVER CO
2016-08-23 720-919 T-MOBILE USA, INC. 6529 DENVER CO
2016-08-18 501-435 T-MOBILE USA, INC. 6529 LITTLEROCK AR
2016-08-18 501-443 T-MOBILE USA, INC. 6529 BENTON AR
2016-08-16 702-886 T-MOBILE USA, INC. 6529 LAS VEGAS NV
2016-08-15 971-432 T-MOBILE USA, INC. 6529 WOODBURN OR
2016-08-12 619-404 T-MOBILE USA, INC. 6529 EL CAJON CA
2016-08-12 747-257 T-MOBILE USA, INC. 6529 GLENDALE CA
2016-08-12 805-554 T-MOBILE USA, INC. 6529 SANTAMARIA CA
2016-08-11 253-287 T-MOBILE USA, INC. 6529 TACOMA WA
2016-08-10 206-698 T-MOBILE USA, INC. 6529 SEATTLE WA
2016-08-09 657-342 T-MOBILE USA, INC. 6529 HUNTITNBCH CA
2016-08-09 951-410 T-MOBILE USA, INC. 6529 RIVERSIDE CA
2016-08-08 747-218 T-MOBILE USA, INC. 6529 LACRSCENTA CA
2016-08-02 626-615 T-MOBILE USA, INC. 6529 ALHAMBRA CA
2016-08-01 808-517 T-MOBILE USA, INC. 6529 HONOLULU HI
2016-07-29 510-424 T-MOBILE USA, INC. 6529 OKLD FRTVL 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.