NumberResearch Membership · Data 09/26/2026

Recent thousands-block assignments

68 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/26/2026

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. 68
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
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2016-04-26 915-316-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 EL PASO TX
2016-04-26 915-593-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 EL PASO TX
2016-04-26 951-422-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 PERRIS CA
2016-04-25 424-533-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SAN PEDRO CA
2016-04-25 442-235-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BARSTOW CA
2016-04-25 442-235-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BARSTOW CA
2016-04-25 562-656-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 PICORIVERA CA
2016-04-25 707-438-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 FRFLD-SUIS CA
2016-04-25 707-606-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BENICIA CA
2016-04-25 707-606-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BENICIA CA
2016-04-25 909-402-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 MARSHALL CA
2016-04-25 909-402-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MARSHALL CA
2016-04-25 925-434-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ANTIOCH CA
2016-04-25 925-434-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ANTIOCH CA
2016-04-25 925-434-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ANTIOCH CA
2016-04-25 951-438-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 HEMT HEMT CA
2016-04-25 951-438-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 HEMT HEMT CA
2016-04-25 951-474-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 HEMT SNJC CA
2016-04-22 602-517-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2016-04-22 602-517-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2016-04-22 602-517-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2016-04-22 602-517-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2016-04-22 602-517-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2016-04-22 602-517-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2016-04-22 602-517-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2016-04-22 602-517-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2016-04-22 602-517-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2016-04-22 623-230-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2016-04-22 623-230-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2016-04-22 623-230-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2016-04-21 520-224-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SIERRAVIST AZ
2016-04-21 641-781-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 NEWTON IA
2016-04-21 707-305-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 VACAVILLE CA
2016-04-20 440-797-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 BEDFORD OH
2016-04-19 424-521-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CMTN CMTN CA
2016-04-19 424-521-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CMTN CMTN CA
2016-04-19 424-521-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CMTN CMTN CA
2016-04-19 602-668-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 PHOENIX AZ
2016-04-19 903-405-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 TYLER TX
2016-04-19 903-426-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 TYLER TX
2016-04-18 509-579-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 KENNEWICK WA
2016-04-18 626-731-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SNGBLCNN CA
2016-04-18 707-757-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SANTA ROSA CA
2016-04-18 707-757-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SANTA ROSA CA
2016-04-18 760-783-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ENCINITAS CA
2016-04-18 760-783-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ENCINITAS CA
2016-04-18 831-324-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MONTEREY CA
2016-04-18 909-671-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 POMONA CA
2016-04-18 909-787-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 RIALTO CA
2016-04-18 909-787-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 RIALTO CA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.