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
2010-03-18 313-312-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN3 MI
2010-03-18 313-312-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN3 MI
2010-03-18 313-571-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN2 MI
2010-03-18 313-571-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN2 MI
2010-03-18 313-898-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2010-03-18 313-898-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2010-03-18 313-915-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN4 MI
2010-03-01 313-240-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN6 MI
2010-03-01 313-240-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN6 MI
2010-02-18 313-451-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN6 MI
2010-02-18 313-451-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN6 MI
2010-02-18 313-451-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN6 MI
2010-02-18 313-451-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN6 MI
2010-02-18 313-451-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN6 MI
2010-02-10 313-288-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN4 MI
2010-02-10 313-288-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN4 MI
2010-02-10 313-312-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN3 MI
2010-02-10 313-312-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN3 MI
2010-02-10 313-355-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN1 MI
2010-02-10 313-355-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN1 MI
2010-02-10 313-405-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN5 MI
2010-02-10 313-405-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN5 MI
2010-02-10 313-409-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN5 MI
2010-02-10 313-444-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN2 MI
2010-02-10 313-444-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN2 MI
2010-02-10 313-444-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN2 MI
2010-02-10 313-444-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN2 MI
2010-02-10 313-643-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN5 MI
2010-02-09 313-242-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN5 MI
2010-02-03 313-288-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN4 MI
2010-02-03 313-288-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN4 MI
2010-02-03 313-288-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN4 MI
2010-02-03 313-288-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN4 MI
2010-02-03 313-312-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN3 MI
2010-02-03 313-312-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN3 MI
2010-02-03 313-312-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN3 MI
2010-02-03 313-355-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN1 MI
2010-02-03 313-389-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN6 MI
2010-02-03 313-438-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN6 MI
2010-02-03 313-444-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN2 MI
2010-02-03 313-444-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN2 MI
2010-02-03 313-583-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN6 MI
2010-02-03 313-870-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2010-02-03 313-870-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2010-02-03 313-923-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN2 MI
2010-02-03 313-923-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN2 MI
2010-01-29 313-355-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN1 MI
2010-01-29 313-375-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN6 MI
2010-01-29 313-375-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN6 MI
2010-01-29 313-676-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 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.