NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

76 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.

Most active assignees, last 30 days
T-MOBILE USA, INC. 76
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 thousands-block assignments
AssignedBlockAssigneeOCNRate centerState
2005-10-19 303-301-5XXX T-MOBILE USA, INC. 6529 DENVER CO
2005-10-19 310-405-9XXX T-MOBILE USA, INC. 6529 W ANGELES CA
2005-10-19 503-951-8XXX T-MOBILE USA, INC. 6529 WOODBURN OR
2005-10-19 808-275-7XXX T-MOBILE USA, INC. 6529 HONOLULU HI
2005-10-18 314-457-3XXX T-MOBILE USA, INC. 6529 ST LOUIS MO
2005-10-18 314-516-3XXX T-MOBILE USA, INC. 6529 ST LOUIS MO
2005-10-18 580-235-9XXX T-MOBILE USA, INC. 6529 ADA OK
2005-10-18 903-272-2XXX T-MOBILE USA, INC. 6529 PARIS TX
2005-10-18 903-283-4XXX T-MOBILE USA, INC. 6529 TYLER TX
2005-10-17 219-951-2XXX T-MOBILE USA, INC. 6529 GARY IN
2005-10-17 513-353-8XXX T-MOBILE USA, INC. 6529 CINCINNATI OH
2005-10-17 513-354-9XXX T-MOBILE USA, INC. 6529 CINCINNATI OH
2005-10-17 513-388-7XXX T-MOBILE USA, INC. 6529 CINCINNATI OH
2005-10-14 513-349-0XXX T-MOBILE USA, INC. 6529 CINCINNATI OH
2005-10-14 541-550-0XXX T-MOBILE USA, INC. 6529 BEND OR
2005-10-14 559-302-0XXX T-MOBILE USA, INC. 6529 VISALIA CA
2005-10-13 316-621-6XXX T-MOBILE USA, INC. 6529 EL DORADO KS
2005-10-13 702-738-8XXX T-MOBILE USA, INC. 6529 LAS VEGAS NV
2005-10-12 626-322-5XXX T-MOBILE USA, INC. 6529 LA PUENTE CA
2005-10-12 626-377-3XXX T-MOBILE USA, INC. 6529 EL MONTE CA
2005-10-12 719-209-7XXX T-MOBILE USA, INC. 6529 COLORDOSPG CO
2005-10-12 720-216-7XXX T-MOBILE USA, INC. 6529 DENVER CO
2005-10-12 773-621-0XXX T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2005-10-12 773-621-1XXX T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2005-10-12 773-621-2XXX T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2005-10-12 773-621-3XXX T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2005-10-12 773-621-4XXX T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2005-10-12 773-621-5XXX T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2005-10-12 773-621-6XXX T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2005-10-12 773-621-7XXX T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2005-10-12 773-621-8XXX T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2005-10-12 773-621-9XXX T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2005-10-12 909-362-9XXX T-MOBILE USA, INC. 6529 HIGHLAND CA
2005-10-12 916-478-1XXX T-MOBILE USA, INC. 6529 ELK GROVE CA
2005-10-12 951-796-7XXX T-MOBILE USA, INC. 6529 PERRIS CA
2005-10-12 951-796-8XXX T-MOBILE USA, INC. 6529 PERRIS CA
2005-10-11 209-244-6XXX T-MOBILE USA, INC. 6529 STOCKTON CA
2005-10-11 219-210-2XXX T-MOBILE USA, INC. 6529 MICHIGANCY IN
2005-10-11 310-438-8XXX T-MOBILE USA, INC. 6529 CMTN CMTN CA
2005-10-11 310-982-5XXX T-MOBILE USA, INC. 6529 SAN PEDRO CA
2005-10-11 323-540-1XXX T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2005-10-11 323-540-2XXX T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2005-10-11 323-767-7XXX T-MOBILE USA, INC. 6529 MONTEBELLO CA
2005-10-11 440-212-8XXX T-MOBILE USA, INC. 6529 STRONGSVL OH
2005-10-11 480-358-5XXX T-MOBILE USA, INC. 6529 PHOENIX AZ
2005-10-11 480-358-7XXX T-MOBILE USA, INC. 6529 PHOENIX AZ
2005-10-11 480-358-8XXX T-MOBILE USA, INC. 6529 PHOENIX AZ
2005-10-11 480-634-3XXX T-MOBILE USA, INC. 6529 PHOENIX AZ
2005-10-11 480-840-4XXX T-MOBILE USA, INC. 6529 PHOENIX AZ
2005-10-11 480-840-5XXX T-MOBILE USA, INC. 6529 PHOENIX AZ

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.