NumberResearch Membership · Data 09/23/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/23/2026

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, all time — NPA 859
T-MOBILE USA, INC. 93
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
2023-03-07 859-438-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 COVINGTON KY
2022-01-16 859-600-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 COVINGTON KY
2022-01-16 859-600-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 COVINGTON KY
2022-01-16 859-600-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 COVINGTON KY
2022-01-16 859-600-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 COVINGTON KY
2022-01-16 859-600-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 COVINGTON KY
2022-01-16 859-600-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 COVINGTON KY
2021-10-12 859-529-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 COVINGTON KY
2021-10-12 859-529-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 COVINGTON KY
2021-10-12 859-529-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 COVINGTON KY
2021-10-12 859-529-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 COVINGTON KY
2021-10-12 859-529-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 COVINGTON KY
2021-10-12 859-529-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 COVINGTON KY
2021-10-12 859-529-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 COVINGTON KY
2021-10-12 859-529-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 COVINGTON KY
2015-07-17 859-786-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 COVINGTON KY
2015-07-17 859-786-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 COVINGTON KY
2015-07-17 859-786-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 COVINGTON KY
2015-07-17 859-786-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 COVINGTON KY
2015-06-05 859-777-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 COVINGTON KY
2015-06-05 859-777-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 COVINGTON KY
2015-06-05 859-777-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 COVINGTON KY
2014-08-26 859-287-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 COVINGTON KY
2014-08-26 859-287-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 COVINGTON KY
2014-08-26 859-287-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 COVINGTON KY
2014-08-26 859-287-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 COVINGTON KY
2014-08-26 859-287-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 COVINGTON KY
2014-03-04 859-279-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 COVINGTON KY
2014-03-04 859-279-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 COVINGTON KY
2014-03-04 859-279-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 COVINGTON KY
2014-02-26 859-878-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 COVINGTON KY
2013-09-17 859-878-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 COVINGTON KY
2013-09-17 859-878-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 COVINGTON KY
2013-09-17 859-878-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 COVINGTON KY
2013-05-28 859-878-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 COVINGTON KY
2013-05-28 859-878-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 COVINGTON KY
2013-05-21 859-412-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 COVINGTON KY
2013-04-03 859-638-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 COVINGTON KY
2012-10-31 859-412-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 COVINGTON KY
2012-02-16 859-415-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 COVINGTON KY
2012-02-16 859-415-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 COVINGTON KY
2012-02-16 859-415-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 COVINGTON KY
2012-02-16 859-415-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 COVINGTON KY
2012-02-09 859-443-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 COVINGTON KY
2012-02-09 859-443-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 COVINGTON KY
2012-02-09 859-443-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 COVINGTON KY
2012-02-09 859-443-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 COVINGTON KY
2011-12-19 859-414-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 COVINGTON KY
2011-12-19 859-443-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 COVINGTON KY
2011-12-19 859-444-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 COVINGTON KY

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.