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
2023-06-09 840-232-8XXX T-MOBILE USA, INC. 6529 FONTANA CA
2023-06-09 840-232-9XXX T-MOBILE USA, INC. 6529 FONTANA CA
2023-06-08 747-463-2XXX T-MOBILE USA, INC. 6529 CANOGAPARK CA
2023-06-08 747-774-5XXX T-MOBILE USA, INC. 6529 CANOGAPARK CA
2023-06-08 747-774-6XXX T-MOBILE USA, INC. 6529 CANOGAPARK CA
2023-06-08 840-217-5XXX T-MOBILE USA, INC. 6529 FONTANA CA
2023-06-07 567-355-3XXX T-MOBILE USA, INC. 6529 GALION OH
2023-06-05 325-321-5XXX T-MOBILE USA, INC. 6529 COMANCHE TX
2023-06-05 325-321-6XXX T-MOBILE USA, INC. 6529 COMANCHE TX
2023-06-01 316-421-8XXX T-MOBILE USA, INC. 6529 TOWANDA KS
2023-06-01 316-421-9XXX T-MOBILE USA, INC. 6529 TOWANDA KS
2023-05-31 279-297-7XXX T-MOBILE USA, INC. 6529 ELK GROVE CA
2023-05-31 279-297-8XXX T-MOBILE USA, INC. 6529 ELK GROVE CA
2023-05-31 458-285-3XXX T-MOBILE USA, INC. 6529 ALBANY OR
2023-05-31 458-285-4XXX T-MOBILE USA, INC. 6529 ALBANY OR
2023-05-31 520-435-9XXX T-MOBILE USA, INC. 6529 WILLCOX AZ
2023-05-31 628-282-2XXX T-MOBILE USA, INC. 6529 SNFC JUNPR CA
2023-05-31 657-621-2XXX T-MOBILE USA, INC. 6529 WESTMINSTR CA
2023-05-31 657-621-3XXX T-MOBILE USA, INC. 6529 WESTMINSTR CA
2023-05-31 840-231-9XXX T-MOBILE USA, INC. 6529 POMONA CA
2023-05-31 945-786-0XXX T-MOBILE USA, INC. 6529 ENNIS TX
2023-05-31 945-786-1XXX T-MOBILE USA, INC. 6529 ENNIS TX
2023-05-31 951-624-7XXX T-MOBILE USA, INC. 6529 ARLINGTON CA
2023-05-30 708-871-0XXX T-MOBILE USA, INC. 6529 RIVERSIDE IL
2023-05-26 564-230-7XXX T-MOBILE USA, INC. 6529 BREMERTON WA
2023-05-26 564-230-8XXX T-MOBILE USA, INC. 6529 BREMERTON WA
2023-05-26 564-230-9XXX T-MOBILE USA, INC. 6529 BREMERTON WA
2023-05-23 430-291-0XXX T-MOBILE USA, INC. 6529 TEXARKANA TX
2023-05-23 430-291-3XXX T-MOBILE USA, INC. 6529 TEXARKANA TX
2023-05-23 430-291-4XXX T-MOBILE USA, INC. 6529 TEXARKANA TX
2023-05-23 430-291-5XXX T-MOBILE USA, INC. 6529 TEXARKANA TX
2023-05-23 430-291-6XXX T-MOBILE USA, INC. 6529 TEXARKANA TX
2023-05-23 430-291-7XXX T-MOBILE USA, INC. 6529 TEXARKANA TX
2023-05-22 725-276-9XXX T-MOBILE USA, INC. 6529 LAS VEGAS NV
2023-05-22 725-298-1XXX T-MOBILE USA, INC. 6529 LAS VEGAS NV
2023-05-22 725-298-2XXX T-MOBILE USA, INC. 6529 LAS VEGAS NV
2023-05-22 725-298-6XXX T-MOBILE USA, INC. 6529 LAS VEGAS NV
2023-05-22 725-298-8XXX T-MOBILE USA, INC. 6529 LAS VEGAS NV
2023-05-19 442-944-2XXX T-MOBILE USA, INC. 6529 VISTA CA
2023-05-19 480-953-0XXX T-MOBILE USA, INC. 6529 PHOENIX AZ
2023-05-19 480-953-1XXX T-MOBILE USA, INC. 6529 PHOENIX AZ
2023-05-19 480-953-2XXX T-MOBILE USA, INC. 6529 PHOENIX AZ
2023-05-19 480-953-3XXX T-MOBILE USA, INC. 6529 PHOENIX AZ
2023-05-19 480-953-4XXX T-MOBILE USA, INC. 6529 PHOENIX AZ
2023-05-19 480-953-5XXX T-MOBILE USA, INC. 6529 PHOENIX AZ
2023-05-19 480-953-6XXX T-MOBILE USA, INC. 6529 PHOENIX AZ
2023-05-19 480-953-7XXX T-MOBILE USA, INC. 6529 PHOENIX AZ
2023-05-19 480-953-8XXX T-MOBILE USA, INC. 6529 PHOENIX AZ
2023-05-19 480-953-9XXX T-MOBILE USA, INC. 6529 PHOENIX AZ
2023-05-19 509-310-7XXX T-MOBILE USA, INC. 6529 WH SALMON WA

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.