NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

6 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

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 — NPA 313
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 4
OPENTACT INC. 1
INTRADO COMMUNICATIONS, LLC 1
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
2008-02-15 313-854-2XXX 2000–2999Assigned METROPCS, INC. 5562 DETROITZN6 MI
2008-02-15 313-854-3XXX 3000–3999Assigned METROPCS, INC. 5562 DETROITZN6 MI
2008-02-15 313-854-5XXX 5000–5999Assigned METROPCS, INC. 5562 DETROITZN6 MI
2008-02-15 313-854-8XXX 8000–8999Assigned METROPCS, INC. 5562 DETROITZN6 MI
2008-02-12 313-543-8XXX 8000–8999Assigned 123.NET, LLC 2550 DETROITZN5 MI
2008-02-12 313-733-0XXX 0000–0999Assigned 123.NET, LLC 2550 DETROITZN3 MI
2008-02-07 313-221-0XXX 0000–0999Assigned METROPCS, INC. 5562 DETROITZN1 MI
2008-02-07 313-293-1XXX 1000–1999Assigned METROPCS, INC. 5562 DETROITZN1 MI
2008-02-07 313-293-9XXX 9000–9999Assigned METROPCS, INC. 5562 DETROITZN1 MI
2008-02-07 313-424-3XXX 3000–3999Assigned METROPCS, INC. 5562 DETROITZN1 MI
2008-02-07 313-454-6XXX 6000–6999Assigned METROPCS, INC. 5562 DETROITZN3 MI
2008-02-07 313-454-7XXX 7000–7999Assigned METROPCS, INC. 5562 DETROITZN3 MI
2008-02-07 313-454-8XXX 8000–8999Assigned METROPCS, INC. 5562 DETROITZN3 MI
2008-02-07 313-454-9XXX 9000–9999Assigned METROPCS, INC. 5562 DETROITZN3 MI
2008-02-07 313-463-1XXX 1000–1999Assigned METROPCS, INC. 5562 DETROITZN1 MI
2008-02-07 313-624-5XXX 5000–5999Assigned METROPCS, INC. 5562 DETROITZN6 MI
2008-02-07 313-624-7XXX 7000–7999Assigned METROPCS, INC. 5562 DETROITZN6 MI
2008-02-07 313-633-4XXX 4000–4999Assigned METROPCS, INC. 5562 DETROITZN6 MI
2008-02-07 313-633-6XXX 6000–6999Assigned METROPCS, INC. 5562 DETROITZN6 MI
2008-02-07 313-826-2XXX 2000–2999Assigned METROPCS, INC. 5562 DETROITZN3 MI
2008-02-07 313-854-4XXX 4000–4999Assigned METROPCS, INC. 5562 DETROITZN6 MI
2008-02-01 313-556-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J DETROITZN1 MI
2008-02-01 313-642-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J DETROITZN2 MI
2008-01-17 313-244-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 DETROITZN5 MI
2008-01-09 313-978-0XXX 0000–0999Assigned METROPCS, INC. 5562 DETROITZN5 MI
2008-01-09 313-978-1XXX 1000–1999Assigned METROPCS, INC. 5562 DETROITZN5 MI
2008-01-09 313-978-2XXX 2000–2999Assigned METROPCS, INC. 5562 DETROITZN5 MI
2008-01-09 313-978-3XXX 3000–3999Assigned METROPCS, INC. 5562 DETROITZN5 MI
2008-01-09 313-978-4XXX 4000–4999Assigned METROPCS, INC. 5562 DETROITZN5 MI
2008-01-09 313-978-5XXX 5000–5999Assigned METROPCS, INC. 5562 DETROITZN5 MI
2008-01-09 313-978-6XXX 6000–6999Assigned METROPCS, INC. 5562 DETROITZN5 MI
2008-01-09 313-978-7XXX 7000–7999Assigned METROPCS, INC. 5562 DETROITZN5 MI
2008-01-09 313-978-8XXX 8000–8999Assigned METROPCS, INC. 5562 DETROITZN5 MI
2008-01-07 313-243-6XXX 6000–6999Assigned METROPCS, INC. 5562 DETROITZN4 MI
2008-01-07 313-285-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2008-01-07 313-285-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2008-01-07 313-285-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2008-01-07 313-285-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2008-01-07 313-397-5XXX 5000–5999Assigned METROPCS, INC. 5562 DETROITZN4 MI
2008-01-07 313-458-1XXX 1000–1999Assigned METROPCS, INC. 5562 DETROITZN2 MI
2008-01-07 313-458-2XXX 2000–2999Assigned METROPCS, INC. 5562 DETROITZN2 MI
2008-01-07 313-458-3XXX 3000–3999Assigned METROPCS, INC. 5562 DETROITZN2 MI
2008-01-07 313-458-6XXX 6000–6999Assigned METROPCS, INC. 5562 DETROITZN2 MI
2008-01-07 313-646-1XXX 1000–1999Assigned METROPCS, INC. 5562 DETROITZN4 MI
2008-01-07 313-653-9XXX 9000–9999Assigned METROPCS, INC. 5562 DETROITZN4 MI
2008-01-07 313-753-1XXX 1000–1999Assigned METROPCS, INC. 5562 DETROITZN5 MI
2008-01-07 313-753-2XXX 2000–2999Assigned METROPCS, INC. 5562 DETROITZN5 MI
2008-01-07 313-753-3XXX 3000–3999Assigned METROPCS, INC. 5562 DETROITZN5 MI
2008-01-07 313-753-4XXX 4000–4999Assigned METROPCS, INC. 5562 DETROITZN5 MI
2008-01-07 313-753-5XXX 5000–5999Assigned METROPCS, INC. 5562 DETROITZN5 MI

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.