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
2016-11-17 313-284-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C DETROITZN2 MI
2016-11-17 313-284-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C DETROITZN2 MI
2016-11-16 313-752-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2016-11-16 313-752-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2016-11-16 313-752-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2016-11-16 313-752-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2016-11-16 313-752-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2016-11-16 313-752-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2016-11-09 313-913-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2016-10-17 313-254-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J DETROITZN6 MI
2016-09-28 313-913-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN1 MI
2016-09-28 313-913-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN1 MI
2016-09-28 313-913-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN1 MI
2016-09-26 313-284-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN2 MI
2016-09-26 313-284-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN2 MI
2016-09-26 313-284-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN2 MI
2016-09-26 313-293-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN1 MI
2016-09-26 313-636-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN4 MI
2016-09-26 313-636-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN4 MI
2016-09-26 313-636-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN4 MI
2016-09-26 313-992-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN5 MI
2016-08-19 313-913-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2016-08-19 313-913-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2016-08-19 313-913-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2016-08-19 313-913-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2016-08-19 313-913-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2016-08-19 313-913-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2016-08-10 313-326-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN5 MI
2016-08-10 313-326-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN5 MI
2016-08-10 313-326-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN5 MI
2016-08-10 313-652-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN1 MI
2016-08-10 313-652-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN1 MI
2016-07-20 313-395-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN6 MI
2016-07-20 313-395-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN6 MI
2016-07-13 313-652-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2016-07-13 313-652-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2016-07-13 313-652-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2016-07-13 313-652-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2016-07-13 313-652-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2016-07-13 313-652-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2016-07-13 313-652-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2016-07-13 313-652-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2016-07-08 313-221-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2016-06-22 313-335-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 DETROITZN1 MI
2016-06-21 313-395-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN6 MI
2016-06-17 313-356-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN3 MI
2016-06-13 313-261-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 7279 DETROITZN1 MI
2016-06-10 313-335-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2016-06-10 313-398-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2016-06-10 313-420-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 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.