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
2016-09-15 312-687-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2016-09-15 312-687-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2016-09-15 312-687-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2016-09-15 312-687-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN01 IL
2016-09-15 442-258-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 EL CENTRO CA
2016-09-15 442-271-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 EL CENTRO CA
2016-09-15 505-737-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ALBUQURQUE NM
2016-09-15 510-890-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 RICHMOND CA
2016-09-15 520-274-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TUCSON AZ
2016-09-15 520-402-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BENSON AZ
2016-09-15 657-335-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SANTA ANA CA
2016-09-15 657-335-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 SANTA ANA CA
2016-09-15 708-852-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICAGOHTS IL
2016-09-15 708-852-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICAGOHTS IL
2016-09-15 708-875-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 HARVEY IL
2016-09-15 708-875-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 HARVEY IL
2016-09-15 775-683-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 RENO NV
2016-09-15 775-683-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 RENO NV
2016-09-14 208-813-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BOISE ID
2016-09-14 208-813-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BOISE ID
2016-09-14 325-301-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SAN ANGELO TX
2016-09-14 325-301-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SAN ANGELO TX
2016-09-14 385-297-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2016-09-14 405-762-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 STILLWATER OK
2016-09-14 405-937-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 STILLWATER OK
2016-09-14 432-232-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ODESSA TX
2016-09-14 432-232-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ODESSA TX
2016-09-14 469-837-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 TERRELL TX
2016-09-14 469-837-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TERRELL TX
2016-09-13 253-409-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2016-09-13 314-528-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2016-09-13 314-528-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2016-09-13 424-308-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SAN PEDRO CA
2016-09-13 424-308-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SAN PEDRO CA
2016-09-13 424-558-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 TORRANCE CA
2016-09-13 442-268-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PALM SPG CA
2016-09-13 442-286-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ESCONDIDO CA
2016-09-13 442-286-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ESCONDIDO CA
2016-09-13 510-424-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 OKLD FRTVL CA
2016-09-13 510-424-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 OKLD FRTVL CA
2016-09-13 510-424-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 OKLD FRTVL CA
2016-09-13 515-336-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 DES MOINES IA
2016-09-13 515-336-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 DES MOINES IA
2016-09-13 515-723-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 DES MOINES IA
2016-09-13 530-650-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 WOODLAND CA
2016-09-13 541-400-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 HOOD RIVER OR
2016-09-13 559-330-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 MADERA CA
2016-09-13 559-330-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 MADERA CA
2016-09-13 559-371-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 FRESNO CA
2016-09-13 559-371-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 FRESNO 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.