NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

6 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026

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
2015-01-21 313-246-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN5 MI
2015-01-21 313-246-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN5 MI
2015-01-21 313-296-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN5 MI
2015-01-21 313-296-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN5 MI
2015-01-21 313-296-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN5 MI
2015-01-21 313-296-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN5 MI
2015-01-21 313-495-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN5 MI
2015-01-21 313-812-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN5 MI
2015-01-21 313-812-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN5 MI
2015-01-21 313-812-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN5 MI
2015-01-21 313-812-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN5 MI
2015-01-21 313-812-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN5 MI
2015-01-21 313-859-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN5 MI
2015-01-21 313-919-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN5 MI
2015-01-20 313-246-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN5 MI
2015-01-20 313-707-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J DETROITZN3 MI
2015-01-12 313-789-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C DETROITZN6 MI
2014-12-31 313-558-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J DETROITZN6 MI
2014-12-26 313-818-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J DETROITZN1 MI
2014-12-02 313-818-0XXX 0000–0999Assigned AT&T ENTERPRISES, LLC 516C DETROITZN1 MI
2014-12-02 313-818-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E DETROITZN1 MI
2014-11-25 313-818-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2014-11-25 313-818-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2014-11-25 313-936-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN2 MI
2014-11-25 313-936-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN2 MI
2014-11-25 313-936-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN2 MI
2014-11-25 313-936-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN2 MI
2014-11-25 313-936-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN2 MI
2014-11-21 313-395-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C DETROITZN6 MI
2014-11-21 313-395-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C DETROITZN6 MI
2014-11-21 313-558-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C DETROITZN6 MI
2014-11-20 313-329-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2014-11-20 313-329-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2014-11-20 313-329-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2014-11-20 313-329-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2014-11-20 313-329-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2014-11-20 313-742-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2014-11-20 313-742-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2014-11-20 313-742-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2014-11-20 313-742-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2014-11-20 313-877-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2014-11-20 313-939-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN2 MI
2014-11-20 313-939-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN2 MI
2014-11-20 313-939-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN2 MI
2014-11-20 313-939-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN2 MI
2014-11-20 313-939-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN2 MI
2014-11-20 313-960-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2014-11-14 313-855-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C DETROITZN4 MI
2014-11-14 313-855-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C DETROITZN4 MI
2014-11-14 313-855-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C DETROITZN4 MI

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.