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
2021-02-12 620-418 T-MOBILE USA, INC. 6529 FORT SCOTT KS
2021-02-12 620-419 T-MOBILE USA, INC. 6529 PRATT KS
2021-02-10 602-706 T-MOBILE USA, INC. 6529 PHOENIX AZ
2021-02-09 209-657 T-MOBILE USA, INC. 6529 RIVERBANK CA
2021-02-05 573-952 T-MOBILE USA, INC. 6529 FLAT RIVER MO
2021-02-03 505-451 T-MOBILE USA, INC. 6529 LAS VEGAS NM
2021-02-01 340-208 T-MOBILE USA, INC. 6529 ST CROIX VI
2021-01-29 469-937 T-MOBILE USA, INC. 6529 FORNEY TX
2021-01-29 708-739 T-MOBILE USA, INC. 6529 CHICAGOHTS IL
2021-01-27 513-809 T-MOBILE USA, INC. 6529 LEBANON OH
2021-01-27 513-822 T-MOBILE USA, INC. 6529 MIDDLETOWN OH
2021-01-27 747-305 T-MOBILE USA, INC. 6529 BRBN BRBN CA
2021-01-26 430-280 T-MOBILE USA, INC. 6529 GREENVILLE TX
2021-01-20 405-907 T-MOBILE USA, INC. 6529 CHANDLER OK
2021-01-19 440-687 T-MOBILE USA, INC. 6529 ELYRIA OH
2021-01-19 564-244 T-MOBILE USA, INC. 6529 LONGVIEW WA
2021-01-18 213-548 T-MOBILE USA, INC. 6529 LSAN DA 10 CA
2021-01-15 425-364 T-MOBILE USA, INC. 6529 BOTHELL WA
2021-01-14 224-369 T-MOBILE USA, INC. 6529 WAUKEGAN IL
2021-01-14 331-268 T-MOBILE USA, INC. 6529 SUGARGROVE IL
2021-01-14 708-696 T-MOBILE USA, INC. 6529 ORLAND IL
2021-01-14 720-803 T-MOBILE USA, INC. 6529 DENVER CO
2021-01-13 224-349 T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2021-01-13 501-449 T-MOBILE USA, INC. 6529 CABOT AR
2021-01-13 669-307 T-MOBILE USA, INC. 6529 SNJS NORTH CA
2021-01-12 564-208 T-MOBILE USA, INC. 6529 VANCOUVER WA
2021-01-11 509-517 T-MOBILE USA, INC. 6529 YAKIMA WA
2021-01-11 520-534 T-MOBILE USA, INC. 6529 TUCSON AZ
2021-01-11 628-276 T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2021-01-11 725-243 T-MOBILE USA, INC. 6529 LAS VEGAS NV
2021-01-11 915-272 T-MOBILE USA, INC. 6529 EL PASO TX
2021-01-08 385-427 T-MOBILE USA, INC. 6529 KAYSVILLE UT
2021-01-08 602-784 T-MOBILE USA, INC. 6529 PHOENIX AZ
2021-01-08 619-902 T-MOBILE USA, INC. 6529 CHULAVISTA CA
2021-01-08 858-241 T-MOBILE USA, INC. 6529 LA JOLLA CA
2020-12-23 520-637 T-MOBILE USA, INC. 6529 CASAGRANDE AZ
2020-12-22 340-203 T-MOBILE USA, INC. 6529 CHTAMSTTHS VI
2020-12-22 425-494 T-MOBILE USA, INC. 6529 ISSAQUAH WA
2020-12-21 425-520 T-MOBILE USA, INC. 6529 BELLEVUE WA
2020-12-18 469-927 T-MOBILE USA, INC. 6529 MCKINNEY TX
2020-12-17 505-447 T-MOBILE USA, INC. 6529 GRANTS NM
2020-12-16 530-703 T-MOBILE USA, INC. 6529 OROVILLE CA
2020-12-16 951-564 T-MOBILE USA, INC. 6529 PERRIS CA
2020-12-16 971-389 T-MOBILE USA, INC. 6529 TILLAMOOK OR
2020-12-14 217-969 T-MOBILE USA, INC. 6529 LITCHFIELD IL
2020-12-14 564-204 T-MOBILE USA, INC. 6529 CENTRALIA WA
2020-12-11 224-368 T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2020-12-11 310-290 T-MOBILE USA, INC. 6529 BEVERLYHLS CA
2020-12-10 480-742 T-MOBILE USA, INC. 6529 PHOENIX AZ
2020-12-10 623-272 T-MOBILE USA, INC. 6529 PHOENIX AZ

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.