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
2021-09-13 840-219 T-MOBILE USA, INC. 6529 CALIMESA CA
2021-09-10 726-209 T-MOBILE USA, INC. 6529 SANANTONIO TX
2021-09-10 726-214 T-MOBILE USA, INC. 6529 SANANTONIO TX
2021-09-09 681-305 T-MOBILE USA, INC. 6529 BECKLEY WV
2021-09-09 737-298 T-MOBILE USA, INC. 6529 LEANDER TX
2021-09-08 513-879 T-MOBILE USA, INC. 6529 CINCINNATI OH
2021-09-08 572-208 T-MOBILE USA, INC. 6529 EDMOND OK
2021-09-08 573-805 T-MOBILE USA, INC. 6529 NEW MADRID MO
2021-09-08 573-935 T-MOBILE USA, INC. 6529 DEXTER MO
2021-09-03 830-347 T-MOBILE USA, INC. 6529 MARBLE FLS TX
2021-09-01 575-284 T-MOBILE USA, INC. 6529 SILVERCITY NM
2021-08-31 213-871 T-MOBILE USA, INC. 6529 LSAN DA 11 CA
2021-08-31 530-780 T-MOBILE USA, INC. 6529 REDDING CA
2021-08-31 840-209 T-MOBILE USA, INC. 6529 ARROWHEAD CA
2021-08-30 720-655 T-MOBILE USA, INC. 6529 DENVER CO
2021-08-27 573-601 T-MOBILE USA, INC. 6529 KENNETT MO
2021-08-26 314-861 T-MOBILE USA, INC. 6529 ST LOUIS MO
2021-08-26 314-906 T-MOBILE USA, INC. 6529 ST LOUIS MO
2021-08-25 530-704 T-MOBILE USA, INC. 6529 WOODLAND CA
2021-08-25 737-297 T-MOBILE USA, INC. 6529 AUSTIN TX
2021-08-24 219-289 T-MOBILE USA, INC. 6529 E CHICAGO IN
2021-08-24 520-556 T-MOBILE USA, INC. 6529 SIERRAVIST AZ
2021-08-24 708-664 T-MOBILE USA, INC. 6529 CHICAGOHTS IL
2021-08-24 737-296 T-MOBILE USA, INC. 6529 AUSTIN TX
2021-08-24 928-418 T-MOBILE USA, INC. 6529 KINGMAN AZ
2021-08-24 945-216 T-MOBILE USA, INC. 6529 FRISCO TX
2021-08-24 945-217 T-MOBILE USA, INC. 6529 FRISCO TX
2021-08-23 213-585 T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2021-08-23 530-785 T-MOBILE USA, INC. 6529 AUBN MAIN CA
2021-08-23 619-949 T-MOBILE USA, INC. 6529 CHULAVISTA CA
2021-08-23 626-725 T-MOBILE USA, INC. 6529 ALHAMBRA CA
2021-08-23 650-613 T-MOBILE USA, INC. 6529 PALO ALTO CA
2021-08-23 657-527 T-MOBILE USA, INC. 6529 ANAHEIM CA
2021-08-20 737-293 T-MOBILE USA, INC. 6529 BASTROP TX
2021-08-20 737-294 T-MOBILE USA, INC. 6529 BASTROP TX
2021-08-20 915-279 T-MOBILE USA, INC. 6529 EL PASO TX
2021-08-20 971-408 T-MOBILE USA, INC. 6529 TILLAMOOK OR
2021-08-19 480-806 T-MOBILE USA, INC. 6529 PHOENIX AZ
2021-08-19 602-816 T-MOBILE USA, INC. 6529 PHOENIX AZ
2021-08-18 725-256 T-MOBILE USA, INC. 6529 LAS VEGAS NV
2021-08-17 206-710 T-MOBILE USA, INC. 6529 SEATTLE WA
2021-08-17 424-457 T-MOBILE USA, INC. 6529 BEVERLYHLS CA
2021-08-12 945-209 T-MOBILE USA, INC. 6529 GRANDPRARI TX
2021-08-11 945-208 T-MOBILE USA, INC. 6529 GRANDPRARI TX
2021-08-04 314-901 T-MOBILE USA, INC. 6529 LADUE MO
2021-08-04 920-701 T-MOBILE USA, INC. 6529 LOMIRA WI
2021-08-03 216-418 T-MOBILE USA, INC. 6529 CLEVELAND OH
2021-08-03 224-391 T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2021-08-03 224-396 T-MOBILE USA, INC. 6529 BARRINGTON IL
2021-08-03 224-397 T-MOBILE USA, INC. 6529 ALGONQUIN IL

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.