NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

66 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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. 66
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
2007-01-08 503-856-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SALEM OR
2007-01-08 503-856-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SALEM OR
2007-01-08 630-974-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 HINSDALE IL
2007-01-08 719-304-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 COLORDOSPG CO
2007-01-08 719-304-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 COLORDOSPG CO
2007-01-08 801-330-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2007-01-08 801-428-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2007-01-08 801-574-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2007-01-08 801-584-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2007-01-08 801-835-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2007-01-08 801-835-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2007-01-08 801-953-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2007-01-08 818-588-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BRBN BRBN CA
2007-01-08 818-588-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BRBN BRBN CA
2007-01-05 219-427-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 GARY IN
2007-01-05 219-427-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 GARY IN
2007-01-05 219-427-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 GARY IN
2007-01-05 219-427-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 GARY IN
2007-01-05 262-501-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 WAUKESHA WI
2007-01-05 309-444-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 WASHINGTON IL
2007-01-05 323-348-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 12 CA
2007-01-05 323-348-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LSAN DA 12 CA
2007-01-05 325-436-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SNYDER TX
2007-01-05 330-265-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CANTON OH
2007-01-05 513-850-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LEBANON OH
2007-01-05 619-467-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LA MESA CA
2007-01-05 619-467-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LA MESA CA
2007-01-05 630-457-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 GENEVA IL
2007-01-05 661-916-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LANCASTER CA
2007-01-05 714-548-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 WESTMINSTR CA
2007-01-05 714-548-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 WESTMINSTR CA
2007-01-05 714-548-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 WESTMINSTR CA
2007-01-05 806-224-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LUBBOCK TX
2007-01-05 806-224-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LUBBOCK TX
2007-01-05 806-831-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LUBBOCK TX
2007-01-05 806-831-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LUBBOCK TX
2007-01-05 815-708-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ROCKFORD IL
2007-01-05 818-447-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SNFN SNFN CA
2007-01-05 818-447-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SNFN SNFN CA
2007-01-05 903-269-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 GREENVILLE TX
2007-01-04 216-632-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 MONTRSE OH
2007-01-04 330-281-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 RAVENNA OH
2007-01-04 419-612-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 MANSFIELD OH
2007-01-04 773-470-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2007-01-04 773-470-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2007-01-04 773-470-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2007-01-04 773-526-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2007-01-04 773-526-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CHICGOZN08 IL
2007-01-04 814-384-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ERIE PA
2007-01-02 708-248-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHICAGOHTS IL

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.