NumberResearch Membership · Data 09/25/2026

Recent thousands-block assignments

68 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/25/2026

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
2018-10-19 217-926-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ARCOLA IL
2018-10-19 217-926-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ARCOLA IL
2018-10-19 217-926-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ARCOLA IL
2018-10-19 217-926-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ARCOLA IL
2018-10-19 219-257-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CROWNPOINT IN
2018-10-19 219-257-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CROWNPOINT IN
2018-10-19 219-257-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CROWNPOINT IN
2018-10-19 219-257-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CROWNPOINT IN
2018-10-19 219-257-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CROWNPOINT IN
2018-10-19 219-257-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CROWNPOINT IN
2018-10-19 219-257-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CROWNPOINT IN
2018-10-19 234-250-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 AKRON OH
2018-10-19 234-250-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 AKRON OH
2018-10-19 234-250-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 AKRON OH
2018-10-19 234-250-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 AKRON OH
2018-10-19 234-250-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 AKRON OH
2018-10-19 234-250-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 AKRON OH
2018-10-19 234-802-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 MEDINA OH
2018-10-19 234-803-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BRUNSWICK OH
2018-10-19 234-803-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BRUNSWICK OH
2018-10-19 234-803-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BRUNSWICK OH
2018-10-19 330-305-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 NO CANTON OH
2018-10-19 330-391-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 MEDINA OH
2018-10-19 330-391-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 MEDINA OH
2018-10-19 330-391-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 MEDINA OH
2018-10-19 330-396-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 MONTROSE OH
2018-10-19 330-934-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 NEWPHLDLPH OH
2018-10-19 331-219-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 AURORA IL
2018-10-19 440-317-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BEDFORD OH
2018-10-19 702-849-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 MESQUITE NV
2018-10-19 747-291-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BRBN BRBN CA
2018-10-19 818-860-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BRBN BRBN CA
2018-10-19 951-465-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 RIVERSIDE CA
2018-10-18 206-513-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2018-10-18 206-665-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2018-10-18 206-665-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2018-10-18 208-603-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SANDPOINT ID
2018-10-18 213-285-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LSAN DA 01 CA
2018-10-18 213-285-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LSAN DA 01 CA
2018-10-18 213-285-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LSAN DA 01 CA
2018-10-18 360-316-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 PTTOWNSEND WA
2018-10-18 360-317-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SAN JUAN WA
2018-10-18 360-559-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CENTRALIA WA
2018-10-18 360-914-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 OAK HARBOR WA
2018-10-18 385-260-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2018-10-18 385-283-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PROVO UT
2018-10-18 406-607-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 KALISPELL MT
2018-10-18 415-815-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2018-10-18 424-310-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 HAWTHORNE CA
2018-10-18 424-336-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 HAWTHORNE CA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.