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
2023-08-28 414-262 T-MOBILE USA, INC. 6529 MILWAUKZN4 WI
2023-08-25 872-338 T-MOBILE USA, INC. 6529 CHICGOZN04 IL
2023-08-24 949-796 T-MOBILE USA, INC. 6529 CAPITRNVLY CA
2023-08-23 279-241 T-MOBILE USA, INC. 6529 SCRM MAIN CA
2023-08-23 530-971 T-MOBILE USA, INC. 6529 PLVL WEST CA
2023-08-23 559-872 T-MOBILE USA, INC. 6529 CLOVIS CA
2023-08-23 626-680 T-MOBILE USA, INC. 6529 EL MONTE CA
2023-08-23 657-681 T-MOBILE USA, INC. 6529 FULLERTON CA
2023-08-23 657-684 T-MOBILE USA, INC. 6529 ORANGE CA
2023-08-18 319-414 T-MOBILE USA, INC. 6529 KEOSAUQUA IA
2023-08-17 213-697 T-MOBILE USA, INC. 6529 LSAN DA 14 CA
2023-08-17 626-713 T-MOBILE USA, INC. 6529 MONROVIA CA
2023-08-17 949-792 T-MOBILE USA, INC. 6529 IRVINE CA
2023-08-17 986-268 T-MOBILE USA, INC. 6529 BOISE ID
2023-08-16 442-416 T-MOBILE USA, INC. 6529 SAN MARCOS CA
2023-08-16 707-213 T-MOBILE USA, INC. 6529 BENICIA CA
2023-08-16 925-205 T-MOBILE USA, INC. 6529 DANVILLE CA
2023-08-14 572-219 T-MOBILE USA, INC. 6529 SHAWNEE OK
2023-08-11 564-206 T-MOBILE USA, INC. 6529 BREMERTON WA
2023-08-11 618-986 T-MOBILE USA, INC. 6529 WATERLOO IL
2023-08-11 725-306 T-MOBILE USA, INC. 6529 LAS VEGAS NV
2023-08-10 213-665 T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2023-08-10 369-208 T-MOBILE USA, INC. 6529 SANTA ROSA CA
2023-08-10 442-413 T-MOBILE USA, INC. 6529 ENCINITAS CA
2023-08-10 618-981 T-MOBILE USA, INC. 6529 GRANITE CY IL
2023-08-10 626-530 T-MOBILE USA, INC. 6529 LA PUENTE CA
2023-08-10 657-676 T-MOBILE USA, INC. 6529 SANTA ANA CA
2023-08-10 657-678 T-MOBILE USA, INC. 6529 ANAHEIM CA
2023-08-10 657-679 T-MOBILE USA, INC. 6529 GARDEN GRV CA
2023-08-10 760-850 T-MOBILE USA, INC. 6529 BRAWLEY CA
2023-08-10 971-456 T-MOBILE USA, INC. 6529 TILLAMOOK OR
2023-08-08 872-300 T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2023-08-04 330-200 T-MOBILE USA, INC. 6529 SHARON OH
2023-08-04 440-470 T-MOBILE USA, INC. 6529 ASHTABULA OH
2023-08-04 567-330 T-MOBILE USA, INC. 6529 ASHLAND OH
2023-08-04 937-946 T-MOBILE USA, INC. 6529 XENIA OH
2023-07-31 747-213 T-MOBILE USA, INC. 6529 CANOGAPARK CA
2023-07-28 224-468 T-MOBILE USA, INC. 6529 ELGIN IL
2023-07-28 618-573 T-MOBILE USA, INC. 6529 BELLEVILLE IL
2023-07-28 636-378 T-MOBILE USA, INC. 6529 ST PETERS MO
2023-07-26 219-341 T-MOBILE USA, INC. 6529 E CHICAGO IN
2023-07-26 872-200 T-MOBILE USA, INC. 6529 CHICGOZN06 IL
2023-07-20 779-372 T-MOBILE USA, INC. 6529 DIXON IL
2023-07-18 209-517 T-MOBILE USA, INC. 6529 JAMESTOWN CA
2023-07-18 505-572 T-MOBILE USA, INC. 6529 GALLUP NM
2023-07-13 213-301 T-MOBILE USA, INC. 6529 LSAN DA 07 CA
2023-07-13 213-313 T-MOBILE USA, INC. 6529 LSAN DA 13 CA
2023-07-13 408-303 T-MOBILE USA, INC. 6529 SARATOGA CA
2023-07-13 530-202 T-MOBILE USA, INC. 6529 AUBN MAIN CA
2023-07-13 628-290 T-MOBILE USA, INC. 6529 SNFC JUNPR CA

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.