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
2016-03-16 619-305-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHULAVISTA CA
2016-03-16 915-271-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 EL PASO TX
2016-03-16 915-271-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 EL PASO TX
2016-03-16 915-271-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 EL PASO TX
2016-03-16 915-352-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 EL PASO TX
2016-03-16 937-670-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 GREENVILLE OH
2016-03-15 206-472-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2016-03-15 206-472-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2016-03-15 224-877-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ELK GROVE IL
2016-03-15 224-877-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ELK GROVE IL
2016-03-15 360-503-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 MT VERNON WA
2016-03-15 360-726-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 VANCOUVER WA
2016-03-15 405-402-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ANADARKO OK
2016-03-15 425-524-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 RENTON WA
2016-03-15 425-524-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 RENTON WA
2016-03-15 425-626-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2016-03-15 425-626-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2016-03-15 573-315-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 FLAT RIVER MO
2016-03-15 580-715-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CLINTON OK
2016-03-15 636-775-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TROY MO
2016-03-15 779-513-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ROCKFORD IL
2016-03-15 779-513-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ROCKFORD IL
2016-03-15 779-513-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ROCKFORD IL
2016-03-14 312-383-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2016-03-14 312-383-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2016-03-14 312-383-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2016-03-14 331-321-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 AURORA IL
2016-03-14 331-321-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 AURORA IL
2016-03-14 479-312-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ALMA AR
2016-03-14 720-755-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 DENVER CO
2016-03-14 720-755-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 DENVER CO
2016-03-14 720-755-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 DENVER CO
2016-03-14 720-755-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 DENVER CO
2016-03-14 916-507-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2016-03-14 916-507-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2016-03-14 916-507-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2016-03-14 916-507-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2016-03-11 442-202-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BRAWLEY CA
2016-03-11 915-271-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 EL PASO TX
2016-03-11 915-271-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 EL PASO TX
2016-03-11 915-271-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 EL PASO TX
2016-03-11 928-350-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PRESCOTT AZ
2016-03-11 928-379-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 PRESCOTT AZ
2016-03-11 928-756-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PRESCOTT AZ
2016-03-09 323-616-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2016-03-09 323-616-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2016-03-09 323-616-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2016-03-09 520-639-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 TUCSON AZ
2016-03-09 669-203-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CAMPBELL CA
2016-03-09 747-273-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 GLENDALE 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.