NumberResearch Membership · Data 09/18/2026

Recent prefix assignments

5 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/18/2026

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
2022-04-25 661-653 T-MOBILE USA, INC. 6529 DELANO CA
2022-04-25 719-412 T-MOBILE USA, INC. 6529 COLORDOSPG CO
2022-04-22 480-876 T-MOBILE USA, INC. 6529 PHOENIX AZ
2022-04-22 623-276 T-MOBILE USA, INC. 6529 PHOENIX AZ
2022-04-21 702-661 T-MOBILE USA, INC. 6529 LAS VEGAS NV
2022-04-01 224-460 T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2022-03-28 986-229 T-MOBILE USA, INC. 6529 BOISE ID
2022-03-24 307-419 T-MOBILE USA, INC. 6529 CODY WY
2022-03-22 213-676 T-MOBILE USA, INC. 6529 LSAN DA 14 CA
2022-03-22 224-459 T-MOBILE USA, INC. 6529 LIBERTYVL IL
2022-03-22 307-410 T-MOBILE USA, INC. 6529 POWELL WY
2022-03-21 424-481 T-MOBILE USA, INC. 6529 HAWTHORNE CA
2022-03-17 216-484 T-MOBILE USA, INC. 6529 TERRACE OH
2022-03-14 726-219 T-MOBILE USA, INC. 6529 SANANTONIO TX
2022-03-14 726-220 T-MOBILE USA, INC. 6529 SANANTONIO TX
2022-03-14 726-221 T-MOBILE USA, INC. 6529 SANANTONIO TX
2022-03-11 331-284 T-MOBILE USA, INC. 6529 BARTLETT IL
2022-03-11 916-940 T-MOBILE USA, INC. 6529 SCRM NORTH CA
2022-03-10 209-767 T-MOBILE USA, INC. 6529 ATWATER CA
2022-03-10 505-464 T-MOBILE USA, INC. 6529 ALBUQURQUE NM
2022-03-10 520-634 T-MOBILE USA, INC. 6529 CASAGRANDE AZ
2022-03-09 681-314 T-MOBILE USA, INC. 6529 PRKRSBGZN3 WV
2022-03-08 425-548 T-MOBILE USA, INC. 6529 BOTHELL WA
2022-03-08 458-285 T-MOBILE USA, INC. 6529 ALBANY OR
2022-03-08 971-428 T-MOBILE USA, INC. 6529 SALEM OR
2022-03-07 971-427 T-MOBILE USA, INC. 6529 PORTLAND OR
2022-03-01 425-543 T-MOBILE USA, INC. 6529 BELLEVUE WA
2022-03-01 737-321 T-MOBILE USA, INC. 6529 ELGIN TX
2022-03-01 840-216 T-MOBILE USA, INC. 6529 ARROWHEAD CA
2022-02-28 213-653 T-MOBILE USA, INC. 6529 LSAN DA 10 CA
2022-02-28 341-221 T-MOBILE USA, INC. 6529 HAYWARD CA
2022-02-28 430-297 T-MOBILE USA, INC. 6529 MTPLEASANT TX
2022-02-28 442-378 T-MOBILE USA, INC. 6529 FALLBROOK CA
2022-02-28 562-613 T-MOBILE USA, INC. 6529 NORWALK CA
2022-02-28 575-295 T-MOBILE USA, INC. 6529 ALAMOGORDO NM
2022-02-28 650-698 T-MOBILE USA, INC. 6529 PALO ALTO CA
2022-02-28 805-891 T-MOBILE USA, INC. 6529 MOORPARK CA
2022-02-28 840-215 T-MOBILE USA, INC. 6529 HIGHLAND CA
2022-02-28 840-252 T-MOBILE USA, INC. 6529 MENTONE CA
2022-02-28 971-425 T-MOBILE USA, INC. 6529 TILLAMOOK OR
2022-02-23 331-283 T-MOBILE USA, INC. 6529 GENEVA IL
2022-02-23 539-281 T-MOBILE USA, INC. 6529 BROKENARRW OK
2022-02-23 572-220 T-MOBILE USA, INC. 6529 STILLWATER OK
2022-02-22 219-298 T-MOBILE USA, INC. 6529 E CHICAGO IN
2022-02-22 224-454 T-MOBILE USA, INC. 6529 ELGIN IL
2022-02-22 480-875 T-MOBILE USA, INC. 6529 PHOENIX AZ
2022-02-22 623-284 T-MOBILE USA, INC. 6529 PHOENIX AZ
2022-02-22 681-424 T-MOBILE USA, INC. 6529 CHRLSTNZN6 WV
2022-02-16 712-952 T-MOBILE USA, INC. 6529 OTO IA
2022-02-15 430-295 T-MOBILE USA, INC. 6529 GREENVILLE TX

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/18/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.