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
2022-02-14 440-841 T-MOBILE USA, INC. 6529 ASHTABULA OH
2022-02-11 805-840 T-MOBILE USA, INC. 6529 ARROYOGRND CA
2022-02-11 986-226 T-MOBILE USA, INC. 6529 BOISE ID
2022-02-11 986-313 T-MOBILE USA, INC. 6529 BURLEY ID
2022-02-10 209-919 T-MOBILE USA, INC. 6529 OAKDALE CA
2022-02-10 424-473 T-MOBILE USA, INC. 6529 SAN PEDRO CA
2022-02-10 530-716 T-MOBILE USA, INC. 6529 OROVILLE CA
2022-02-09 915-296 T-MOBILE USA, INC. 6529 EL PASO TX
2022-02-09 920-714 T-MOBILE USA, INC. 6529 APPLETON WI
2022-02-08 830-366 T-MOBILE USA, INC. 6529 PLEASANTON TX
2022-02-04 970-814 T-MOBILE USA, INC. 6529 DURANGO CO
2022-02-02 737-318 T-MOBILE USA, INC. 6529 BASTROP TX
2022-01-31 620-581 T-MOBILE USA, INC. 6529 BAXTER SPG KS
2022-01-28 937-861 T-MOBILE USA, INC. 6529 EATON OH
2022-01-27 213-643 T-MOBILE USA, INC. 6529 LSAN DA 04 CA
2022-01-27 385-456 T-MOBILE USA, INC. 6529 KAYSVILLE UT
2022-01-27 385-457 T-MOBILE USA, INC. 6529 SALT LAKE UT
2022-01-27 425-542 T-MOBILE USA, INC. 6529 BELLEVUE WA
2022-01-27 564-229 T-MOBILE USA, INC. 6529 BREMERTON WA
2022-01-27 719-920 T-MOBILE USA, INC. 6529 COLORDOSPG CO
2022-01-27 720-957 T-MOBILE USA, INC. 6529 DENVER CO
2022-01-26 945-243 T-MOBILE USA, INC. 6529 GRANDPRARI TX
2022-01-26 945-244 T-MOBILE USA, INC. 6529 GRANDPRARI TX
2022-01-26 945-246 T-MOBILE USA, INC. 6529 GRANDPRARI TX
2022-01-26 945-247 T-MOBILE USA, INC. 6529 GRANDPRARI TX
2022-01-20 414-317 T-MOBILE USA, INC. 6529 MILWAUKZN1 WI
2022-01-19 682-373 T-MOBILE USA, INC. 6529 ARLINGTON TX
2022-01-19 682-374 T-MOBILE USA, INC. 6529 ARLINGTON TX
2022-01-19 682-376 T-MOBILE USA, INC. 6529 ARLINGTON TX
2022-01-19 682-377 T-MOBILE USA, INC. 6529 ARLINGTON TX
2022-01-19 937-820 T-MOBILE USA, INC. 6529 HILLSBORO OH
2022-01-19 945-240 T-MOBILE USA, INC. 6529 MIDLOTHIAN TX
2022-01-19 945-241 T-MOBILE USA, INC. 6529 FRISCO TX
2022-01-18 430-290 T-MOBILE USA, INC. 6529 DETROIT TX
2022-01-18 430-291 T-MOBILE USA, INC. 6529 TEXARKANA TX
2022-01-14 424-467 T-MOBILE USA, INC. 6529 W ANGELES CA
2022-01-14 619-983 T-MOBILE USA, INC. 6529 LA MESA CA
2022-01-14 682-372 T-MOBILE USA, INC. 6529 ARLINGTON TX
2022-01-14 726-218 T-MOBILE USA, INC. 6529 SANANTONIO TX
2022-01-13 480-853 T-MOBILE USA, INC. 6529 PHOENIX AZ
2022-01-13 573-926 T-MOBILE USA, INC. 6529 LOUISIANA MO
2022-01-13 623-281 T-MOBILE USA, INC. 6529 PHOENIX AZ
2022-01-13 641-517 T-MOBILE USA, INC. 6529 OSKALOOSA IA
2022-01-11 260-293 T-MOBILE USA, INC. 6529 LAGRANGE IN
2022-01-11 464-202 T-MOBILE USA, INC. 6529 LA GRANGE IL
2022-01-11 636-213 T-MOBILE USA, INC. 6529 WARRENTON MO
2022-01-11 636-214 T-MOBILE USA, INC. 6529 CHESTERFLD MO
2022-01-11 725-271 T-MOBILE USA, INC. 6529 MESQUITE NV
2022-01-11 779-349 T-MOBILE USA, INC. 6529 SPRING VLY IL
2022-01-11 949-685 T-MOBILE USA, INC. 6529 SADLBK VLY 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.