NumberResearch Membership · Data 09/27/2026

Recent thousands-block assignments

68 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/27/2026

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
2014-06-27 872-639-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2014-06-27 872-639-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2014-06-27 872-713-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHICGOZN04 IL
2014-06-27 872-777-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2014-06-27 872-777-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHICGOZN07 IL
2014-06-24 206-556-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2014-06-24 206-556-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2014-06-24 323-745-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LSAN DA 14 CA
2014-06-24 323-745-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 14 CA
2014-06-24 323-745-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LSAN DA 14 CA
2014-06-24 425-326-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2014-06-24 509-319-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SPOKANE WA
2014-06-24 619-386-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHULAVISTA CA
2014-06-24 619-386-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHULAVISTA CA
2014-06-24 619-386-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHULAVISTA CA
2014-06-24 626-247-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ARCADIA CA
2014-06-24 626-425-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ALHAMBRA CA
2014-06-24 626-425-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ALHAMBRA CA
2014-06-24 626-559-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LA PUENTE CA
2014-06-24 626-559-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LA PUENTE CA
2014-06-24 650-656-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 PALO ALTO CA
2014-06-24 650-656-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 PALO ALTO CA
2014-06-24 707-724-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 VACAVILLE CA
2014-06-24 909-491-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 FONTANA CA
2014-06-24 949-558-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CAPITRNVLY CA
2014-06-24 971-803-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PORTLAND OR
2014-06-20 316-227-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 NEWTON KS
2014-06-20 316-227-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 NEWTON KS
2014-06-20 316-227-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 NEWTON KS
2014-06-20 330-356-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ALLIANCE OH
2014-06-20 330-596-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ALLIANCE OH
2014-06-20 737-222-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2014-06-20 737-222-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2014-06-20 737-346-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2014-06-20 737-346-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2014-06-20 737-346-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2014-06-20 737-346-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2014-06-18 216-309-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CLEVELAND OH
2014-06-18 216-309-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CLEVELAND OH
2014-06-18 216-309-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CLEVELAND OH
2014-06-18 216-309-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CLEVELAND OH
2014-06-18 216-309-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CLEVELAND OH
2014-06-18 216-309-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CLEVELAND OH
2014-06-18 216-309-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CLEVELAND OH
2014-06-18 216-507-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CLEVELAND OH
2014-06-18 216-507-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CLEVELAND OH
2014-06-18 216-507-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CLEVELAND OH
2014-06-18 216-507-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CLEVELAND OH
2014-06-18 216-507-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CLEVELAND OH
2014-06-18 216-507-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CLEVELAND OH

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.