NumberResearch Membership · Data 09/24/2026

Recent thousands-block assignments

70 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/24/2026

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. 70
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
2020-10-15 509-312-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ELLENSBURG WA
2020-10-15 562-378-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 WHITTIER CA
2020-10-15 562-576-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 PICORIVERA CA
2020-10-15 562-576-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 PICORIVERA CA
2020-10-15 619-716-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 EL CAJON CA
2020-10-15 661-655-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ARVIN CA
2020-10-15 661-655-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ARVIN CA
2020-10-15 808-481-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 HILO HI
2020-10-15 808-481-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 HILO HI
2020-10-15 820-465-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 OXNARD CA
2020-10-15 820-465-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 OXNARD CA
2020-10-15 909-850-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ONTARIO CA
2020-10-15 909-850-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ONTARIO CA
2020-10-15 916-338-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SCRM NORTH CA
2020-10-15 925-489-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ANTIOCH CA
2020-10-15 925-489-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ANTIOCH CA
2020-10-14 208-417-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 POCATELLO ID
2020-10-14 209-318-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 OAKDALE CA
2020-10-14 209-582-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ATWATER CA
2020-10-14 209-778-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TURLOCK CA
2020-10-14 279-202-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 FAIR OAKS CA
2020-10-14 406-409-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BILLINGS MT
2020-10-14 406-409-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BILLINGS MT
2020-10-14 442-477-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 RIDGECREST CA
2020-10-14 442-477-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 RIDGECREST CA
2020-10-14 442-599-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 INDIO CA
2020-10-14 442-599-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 INDIO CA
2020-10-14 458-253-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ALBANY OR
2020-10-14 458-253-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ALBANY OR
2020-10-14 661-732-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 DELANO CA
2020-10-14 747-724-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SNFN GRHL CA
2020-10-14 775-389-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ELKO NV
2020-10-14 858-683-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 RNCHOBRNDO CA
2020-10-13 341-600-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2020-10-13 341-600-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2020-10-13 385-363-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2020-10-13 442-207-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 FALLBROOK CA
2020-10-13 510-899-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 OKLD MN-PD CA
2020-10-13 510-899-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 OKLD MN-PD CA
2020-10-13 858-758-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 EL CAJON CA
2020-10-13 951-946-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 HEMT SNJC CA
2020-10-13 971-379-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2020-10-13 971-379-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2020-10-13 971-380-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2020-10-13 971-382-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SALEM OR
2020-10-09 442-217-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 VALLEY CTR CA
2020-10-09 505-430-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 GALLUP NM
2020-10-09 928-655-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SOMERTON AZ
2020-10-09 970-694-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 FT COLLINS CO
2020-10-08 360-206-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CENTRALIA WA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/24/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.