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
2017-03-21 331-226-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 NAPERVILLE IL
2017-03-21 331-226-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 NAPERVILLE IL
2017-03-21 530-782-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 REDDING CA
2017-03-21 669-261-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SNJS NORTH CA
2017-03-21 949-619-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SADLBK VLY CA
2017-03-20 505-356-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 GRANTS NM
2017-03-20 510-570-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 OKLD BKLY CA
2017-03-20 510-570-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 OKLD BKLY CA
2017-03-20 530-443-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 MARYSVILLE CA
2017-03-20 573-872-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 POPLAR BLF MO
2017-03-20 949-312-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CAPITRNVLY CA
2017-03-20 949-312-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CAPITRNVLY CA
2017-03-16 262-233-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 DELAVAN WI
2017-03-16 262-399-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 WAUKESHA WI
2017-03-15 214-940-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 FRISCO TX
2017-03-15 214-940-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 FRISCO TX
2017-03-15 214-940-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 FRISCO TX
2017-03-15 214-940-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 FRISCO TX
2017-03-15 214-940-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 FRISCO TX
2017-03-15 214-940-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 FRISCO TX
2017-03-15 214-940-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 FRISCO TX
2017-03-15 214-940-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 FRISCO TX
2017-03-15 214-940-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 FRISCO TX
2017-03-15 214-940-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 FRISCO TX
2017-03-15 219-334-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CROWNPOINT IN
2017-03-15 219-334-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CROWNPOINT IN
2017-03-15 224-428-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ALGONQUIN IL
2017-03-15 224-428-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ALGONQUIN IL
2017-03-15 224-428-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ALGONQUIN IL
2017-03-15 224-428-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ALGONQUIN IL
2017-03-15 224-428-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ALGONQUIN IL
2017-03-15 224-428-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ALGONQUIN IL
2017-03-15 224-877-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ELK GROVE IL
2017-03-15 331-401-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 NAPERVILLE IL
2017-03-15 406-304-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 MISSOULA MT
2017-03-15 406-304-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 MISSOULA MT
2017-03-15 630-938-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 GENEVA IL
2017-03-15 630-938-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 GENEVA IL
2017-03-15 720-487-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LONGMONT CO
2017-03-15 720-487-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LONGMONT CO
2017-03-15 720-487-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LONGMONT CO
2017-03-15 720-487-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LONGMONT CO
2017-03-15 720-487-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LONGMONT CO
2017-03-15 720-487-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LONGMONT CO
2017-03-15 720-487-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LONGMONT CO
2017-03-15 720-487-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LONGMONT CO
2017-03-15 847-510-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 GLENVIEW IL
2017-03-15 847-510-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 GLENVIEW IL
2017-03-15 870-360-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 PINE BLUFF AR
2017-03-15 870-360-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PINE BLUFF AR

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.