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
2020-12-08 520-535 T-MOBILE USA, INC. 6529 TUCSON AZ
2020-12-04 562-523 T-MOBILE USA, INC. 6529 ALAMITOS CA
2020-12-04 971-387 T-MOBILE USA, INC. 6529 MCMINNVL OR
2020-11-30 469-924 T-MOBILE USA, INC. 6529 GRANDPRARI TX
2020-11-30 682-340 T-MOBILE USA, INC. 6529 ARLINGTON TX
2020-11-24 573-613 T-MOBILE USA, INC. 6529 FULTON MO
2020-11-24 720-756 T-MOBILE USA, INC. 6529 DENVER CO
2020-11-24 720-781 T-MOBILE USA, INC. 6529 LONGMONT CO
2020-11-23 442-340 T-MOBILE USA, INC. 6529 BRAWLEY CA
2020-11-23 520-473 T-MOBILE USA, INC. 6529 SIERRAVIST AZ
2020-11-17 254-419 T-MOBILE USA, INC. 6529 KILLEEN TX
2020-11-12 573-617 T-MOBILE USA, INC. 6529 SULLIVAN MO
2020-11-12 573-661 T-MOBILE USA, INC. 6529 BOWLNGGREN MO
2020-11-11 479-405 T-MOBILE USA, INC. 6529 ROGERS AR
2020-11-03 530-702 T-MOBILE USA, INC. 6529 WOODLAND CA
2020-11-03 619-759 T-MOBILE USA, INC. 6529 CHULAVISTA CA
2020-10-30 505-397 T-MOBILE USA, INC. 6529 GALLUP NM
2020-10-29 602-756 T-MOBILE USA, INC. 6529 PHOENIX AZ
2020-10-29 970-792 T-MOBILE USA, INC. 6529 FT COLLINS CO
2020-10-27 509-512 T-MOBILE USA, INC. 6529 MOSES LAKE WA
2020-10-27 564-202 T-MOBILE USA, INC. 6529 BREMERTON WA
2020-10-26 669-304 T-MOBILE USA, INC. 6529 MORGANHILL CA
2020-10-22 425-470 T-MOBILE USA, INC. 6529 EVERETT WA
2020-10-20 253-361 T-MOBILE USA, INC. 6529 TACOMAWVLY WA
2020-10-20 253-368 T-MOBILE USA, INC. 6529 AUBURN WA
2020-10-19 707-854 T-MOBILE USA, INC. 6529 EUREKA CA
2020-10-19 909-905 T-MOBILE USA, INC. 6529 CLAREMONT CA
2020-10-19 916-885 T-MOBILE USA, INC. 6529 SCRM NORTH CA
2020-10-16 209-741 T-MOBILE USA, INC. 6529 ATWATER CA
2020-10-16 661-545 T-MOBILE USA, INC. 6529 DELANO CA
2020-10-16 916-839 T-MOBILE USA, INC. 6529 RSVL MAIN CA
2020-10-15 209-717 T-MOBILE USA, INC. 6529 MANTECA CA
2020-10-15 619-716 T-MOBILE USA, INC. 6529 EL CAJON CA
2020-10-15 925-489 T-MOBILE USA, INC. 6529 ANTIOCH CA
2020-10-12 385-363 T-MOBILE USA, INC. 6529 KAYSVILLE UT
2020-10-02 405-981 T-MOBILE USA, INC. 6529 BETHANY OK
2020-10-01 262-267 T-MOBILE USA, INC. 6529 DELAVAN WI
2020-09-30 224-363 T-MOBILE USA, INC. 6529 ELGIN IL
2020-09-30 234-286 T-MOBILE USA, INC. 6529 WOOSTER OH
2020-09-29 425-532 T-MOBILE USA, INC. 6529 BELLEVUE WA
2020-09-28 458-254 T-MOBILE USA, INC. 6529 KLAMATHFLS OR
2020-09-28 909-852 T-MOBILE USA, INC. 6529 ETIWANDA CA
2020-09-28 909-871 T-MOBILE USA, INC. 6529 MARSHALL CA
2020-09-28 909-892 T-MOBILE USA, INC. 6529 UPLAND CA
2020-09-28 951-557 T-MOBILE USA, INC. 6529 TEMSCL CNY CA
2020-09-15 385-977 T-MOBILE USA, INC. 6529 SALT LAKE UT
2020-09-15 623-264 T-MOBILE USA, INC. 6529 PHOENIX AZ
2020-09-14 405-916 T-MOBILE USA, INC. 6529 EDMOND OK
2020-09-11 234-283 T-MOBILE USA, INC. 6529 WARREN OH
2020-09-11 720-742 T-MOBILE USA, INC. 6529 DENVER CO

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.