NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

2 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 586
NEW CINGULAR WIRELESS PCS, LLC - IL 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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2010-09-21 586-648-5XXX 5000–5999Assigned GRID 4 COMMUNICATIONS, INC. - MI 9714 NEWBALTIMR MI
2010-09-08 586-248-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E RICHMOND MI
2010-09-07 586-335-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROSEVILLE MI
2010-09-07 586-335-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROSEVILLE MI
2010-09-01 586-580-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J UTICA MI
2010-08-30 586-285-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J ROSEVILLE MI
2010-08-30 586-541-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J ROSEVILLE MI
2010-08-27 586-510-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J CENTERLINE MI
2010-08-20 586-825-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C WARREN MI
2010-08-12 586-207-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E WASHINGTON MI
2010-08-12 586-467-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E CENTERLINE MI
2010-08-12 586-580-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E UTICA MI
2010-08-12 586-698-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E WARREN MI
2010-08-09 586-265-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MT CLEMENS MI
2010-08-09 586-265-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MT CLEMENS MI
2010-08-09 586-265-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MT CLEMENS MI
2010-08-09 586-265-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MT CLEMENS MI
2010-08-02 586-569-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MT CLEMENS MI
2010-07-23 586-746-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MT CLEMENS MI
2010-07-23 586-840-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MT CLEMENS MI
2010-07-13 586-335-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROSEVILLE MI
2010-07-13 586-335-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROSEVILLE MI
2010-06-11 586-248-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E RICHMOND MI
2010-06-03 586-992-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J WASHINGTON MI
2010-06-01 586-307-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MT CLEMENS MI
2010-06-01 586-307-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E MT CLEMENS MI
2010-06-01 586-307-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E MT CLEMENS MI
2010-06-01 586-307-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E MT CLEMENS MI
2010-06-01 586-404-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E ROSEVILLE MI
2010-06-01 586-404-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E ROSEVILLE MI
2010-06-01 586-741-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MT CLEMENS MI
2010-06-01 586-741-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MT CLEMENS MI
2010-05-10 586-928-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 NEW HAVEN MI
2010-05-10 586-928-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 NEW HAVEN MI
2010-05-03 586-404-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROSEVILLE MI
2010-04-14 586-381-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2010-04-14 586-481-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2010-04-02 586-404-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROSEVILLE MI
2010-04-02 586-404-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROSEVILLE MI
2010-04-02 586-404-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROSEVILLE MI
2010-04-02 586-404-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROSEVILLE MI
2010-04-02 586-481-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2010-04-02 586-481-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2010-03-30 586-209-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E ROSEVILLE MI
2010-03-30 586-840-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E MT CLEMENS MI
2010-03-23 586-804-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2010-03-23 586-804-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2010-03-23 586-819-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2010-03-23 586-819-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2010-03-22 586-353-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E CENTERLINE 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.