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
2023-07-13 279-226-3XXX T-MOBILE USA, INC. 6529 RSVL MAIN CA
2023-07-13 408-303-6XXX T-MOBILE USA, INC. 6529 SARATOGA CA
2023-07-13 408-303-7XXX T-MOBILE USA, INC. 6529 SARATOGA CA
2023-07-13 408-303-8XXX T-MOBILE USA, INC. 6529 SARATOGA CA
2023-07-13 408-303-9XXX T-MOBILE USA, INC. 6529 SARATOGA CA
2023-07-13 442-944-5XXX T-MOBILE USA, INC. 6529 VISTA CA
2023-07-13 442-944-6XXX T-MOBILE USA, INC. 6529 VISTA CA
2023-07-13 530-201-9XXX T-MOBILE USA, INC. 6529 REDDING CA
2023-07-13 530-202-6XXX T-MOBILE USA, INC. 6529 AUBN MAIN CA
2023-07-13 530-202-7XXX T-MOBILE USA, INC. 6529 AUBN MAIN CA
2023-07-13 530-202-8XXX T-MOBILE USA, INC. 6529 AUBN MAIN CA
2023-07-13 530-202-9XXX T-MOBILE USA, INC. 6529 AUBN MAIN CA
2023-07-13 530-248-9XXX T-MOBILE USA, INC. 6529 REDDING CA
2023-07-13 628-290-7XXX T-MOBILE USA, INC. 6529 SNFC JUNPR CA
2023-07-13 628-290-8XXX T-MOBILE USA, INC. 6529 SNFC JUNPR CA
2023-07-13 628-290-9XXX T-MOBILE USA, INC. 6529 SNFC JUNPR CA
2023-07-13 657-619-6XXX T-MOBILE USA, INC. 6529 ORANGE CA
2023-07-13 720-954-7XXX T-MOBILE USA, INC. 6529 FORTLUPTON CO
2023-07-13 720-954-8XXX T-MOBILE USA, INC. 6529 FORTLUPTON CO
2023-07-13 840-233-9XXX T-MOBILE USA, INC. 6529 ARROWHEAD CA
2023-07-13 928-324-9XXX T-MOBILE USA, INC. 6529 SAFFORD AZ
2023-07-13 949-213-7XXX T-MOBILE USA, INC. 6529 NEWPORTBCH CA
2023-07-13 949-213-8XXX T-MOBILE USA, INC. 6529 NEWPORTBCH CA
2023-07-13 949-213-9XXX T-MOBILE USA, INC. 6529 NEWPORTBCH CA
2023-07-13 949-480-2XXX T-MOBILE USA, INC. 6529 RNCHOVIEJO CA
2023-07-13 949-728-3XXX T-MOBILE USA, INC. 6529 RNCHOVIEJO CA
2023-07-13 949-775-7XXX T-MOBILE USA, INC. 6529 SADLBK VLY CA
2023-07-13 949-775-9XXX T-MOBILE USA, INC. 6529 SADLBK VLY CA
2023-07-13 951-624-4XXX T-MOBILE USA, INC. 6529 ARLINGTON CA
2023-07-13 951-624-5XXX T-MOBILE USA, INC. 6529 ARLINGTON CA
2023-07-13 951-624-6XXX T-MOBILE USA, INC. 6529 ARLINGTON CA
2023-07-13 951-641-9XXX T-MOBILE USA, INC. 6529 HEMT HEMT CA
2023-07-12 442-390-2XXX T-MOBILE USA, INC. 6529 ENCINITAS CA
2023-07-12 442-390-3XXX T-MOBILE USA, INC. 6529 ENCINITAS CA
2023-07-12 442-390-4XXX T-MOBILE USA, INC. 6529 ENCINITAS CA
2023-07-12 442-390-5XXX T-MOBILE USA, INC. 6529 ENCINITAS CA
2023-07-12 442-390-6XXX T-MOBILE USA, INC. 6529 ENCINITAS CA
2023-07-12 458-260-3XXX T-MOBILE USA, INC. 6529 BROOKINGS OR
2023-07-12 458-265-7XXX T-MOBILE USA, INC. 6529 WHITE CITY OR
2023-07-12 657-642-7XXX T-MOBILE USA, INC. 6529 HUNTITNBCH CA
2023-07-12 657-642-8XXX T-MOBILE USA, INC. 6529 HUNTITNBCH CA
2023-07-12 657-642-9XXX T-MOBILE USA, INC. 6529 HUNTITNBCH CA
2023-07-12 747-745-5XXX T-MOBILE USA, INC. 6529 NORTHRIDGE CA
2023-07-12 747-745-7XXX T-MOBILE USA, INC. 6529 NORTHRIDGE CA
2023-07-12 747-745-8XXX T-MOBILE USA, INC. 6529 NORTHRIDGE CA
2023-07-12 747-745-9XXX T-MOBILE USA, INC. 6529 NORTHRIDGE CA
2023-07-12 831-833-5XXX T-MOBILE USA, INC. 6529 HOLLISTER CA
2023-07-12 840-216-1XXX T-MOBILE USA, INC. 6529 ARROWHEAD CA
2023-07-12 840-216-4XXX T-MOBILE USA, INC. 6529 ARROWHEAD CA
2023-07-12 840-216-5XXX T-MOBILE USA, INC. 6529 ARROWHEAD CA

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.