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
2023-08-23 820-217-8XXX T-MOBILE USA, INC. 6529 ATASCADERO CA
2023-08-23 820-217-9XXX T-MOBILE USA, INC. 6529 ATASCADERO CA
2023-08-23 820-218-8XXX T-MOBILE USA, INC. 6529 LOMPOC CA
2023-08-23 840-233-7XXX T-MOBILE USA, INC. 6529 ARROWHEAD CA
2023-08-23 840-233-8XXX T-MOBILE USA, INC. 6529 ARROWHEAD CA
2023-08-23 840-240-9XXX T-MOBILE USA, INC. 6529 DIAMONDBAR CA
2023-08-23 951-630-2XXX T-MOBILE USA, INC. 6529 MORENO CA
2023-08-23 951-630-3XXX T-MOBILE USA, INC. 6529 MORENO CA
2023-08-23 951-632-8XXX T-MOBILE USA, INC. 6529 HEMT SNJC CA
2023-08-23 971-449-3XXX T-MOBILE USA, INC. 6529 PORTLAND OR
2023-08-23 971-449-4XXX T-MOBILE USA, INC. 6529 PORTLAND OR
2023-08-23 971-449-5XXX T-MOBILE USA, INC. 6529 PORTLAND OR
2023-08-23 971-449-6XXX T-MOBILE USA, INC. 6529 PORTLAND OR
2023-08-23 986-209-8XXX T-MOBILE USA, INC. 6529 KETCHUM ID
2023-08-21 319-508-0XXX T-MOBILE USA, INC. 6529 KEOSAUQUA IA
2023-08-21 515-567-1XXX T-MOBILE USA, INC. 6529 AMES IA
2023-08-21 515-567-2XXX T-MOBILE USA, INC. 6529 AMES IA
2023-08-21 515-567-4XXX T-MOBILE USA, INC. 6529 AMES IA
2023-08-18 319-414-9XXX T-MOBILE USA, INC. 6529 KEOSAUQUA IA
2023-08-17 213-656-3XXX T-MOBILE USA, INC. 6529 LSAN DA 01 CA
2023-08-17 213-676-3XXX T-MOBILE USA, INC. 6529 LSAN DA 14 CA
2023-08-17 213-676-4XXX T-MOBILE USA, INC. 6529 LSAN DA 14 CA
2023-08-17 213-676-5XXX T-MOBILE USA, INC. 6529 LSAN DA 14 CA
2023-08-17 213-697-8XXX T-MOBILE USA, INC. 6529 LSAN DA 14 CA
2023-08-17 213-697-9XXX T-MOBILE USA, INC. 6529 LSAN DA 14 CA
2023-08-17 213-757-0XXX T-MOBILE USA, INC. 6529 LSAN DA 01 CA
2023-08-17 213-757-1XXX T-MOBILE USA, INC. 6529 LSAN DA 01 CA
2023-08-17 213-757-3XXX T-MOBILE USA, INC. 6529 LSAN DA 01 CA
2023-08-17 213-868-0XXX T-MOBILE USA, INC. 6529 LSAN DA 01 CA
2023-08-17 213-868-1XXX T-MOBILE USA, INC. 6529 LSAN DA 01 CA
2023-08-17 213-868-4XXX T-MOBILE USA, INC. 6529 LSAN DA 01 CA
2023-08-17 213-868-5XXX T-MOBILE USA, INC. 6529 LSAN DA 01 CA
2023-08-17 213-868-6XXX T-MOBILE USA, INC. 6529 LSAN DA 01 CA
2023-08-17 213-868-7XXX T-MOBILE USA, INC. 6529 LSAN DA 01 CA
2023-08-17 479-510-3XXX T-MOBILE USA, INC. 6529 SPRINGDALE AR
2023-08-17 479-510-4XXX T-MOBILE USA, INC. 6529 SPRINGDALE AR
2023-08-17 626-713-9XXX T-MOBILE USA, INC. 6529 MONROVIA CA
2023-08-17 657-620-6XXX T-MOBILE USA, INC. 6529 CYPRESS CA
2023-08-17 657-649-6XXX T-MOBILE USA, INC. 6529 SILVERADO CA
2023-08-17 949-745-3XXX T-MOBILE USA, INC. 6529 IRVINE CA
2023-08-17 949-745-4XXX T-MOBILE USA, INC. 6529 IRVINE CA
2023-08-17 949-745-7XXX T-MOBILE USA, INC. 6529 IRVINE CA
2023-08-17 949-792-8XXX T-MOBILE USA, INC. 6529 IRVINE CA
2023-08-17 949-792-9XXX T-MOBILE USA, INC. 6529 IRVINE CA
2023-08-17 971-453-6XXX T-MOBILE USA, INC. 6529 SALEM OR
2023-08-17 971-453-7XXX T-MOBILE USA, INC. 6529 SALEM OR
2023-08-17 986-217-8XXX T-MOBILE USA, INC. 6529 BOISE ID
2023-08-17 986-226-6XXX T-MOBILE USA, INC. 6529 BOISE ID
2023-08-17 986-230-0XXX T-MOBILE USA, INC. 6529 BOISE ID
2023-08-17 986-268-9XXX T-MOBILE USA, INC. 6529 BOISE ID

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.