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
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2007-11-27 586-741-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J MT CLEMENS MI
2007-11-27 586-806-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J CENTERLINE MI
2007-11-20 586-447-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 ROSEVILLE MI
2007-11-12 586-859-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROSEVILLE MI
2007-11-07 586-819-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2007-11-02 586-477-0XXX 0000–0999Assigned WOW! INTERNET, CABLE AND PHONE 961J MT CLEMENS MI
2007-10-23 586-218-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROSEVILLE MI
2007-10-15 586-439-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 ROSEVILLE MI
2007-10-12 586-552-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J ROSEVILLE MI
2007-10-08 586-932-2XXX 2000–2999Assigned WOW! INTERNET, CABLE AND PHONE 961J UTICA MI
2007-10-04 586-563-0XXX 0000–0999Assigned METROPCS, INC. 5562 ROSEVILLE MI
2007-10-04 586-563-3XXX 3000–3999Assigned METROPCS, INC. 5562 ROSEVILLE MI
2007-10-04 586-563-4XXX 4000–4999Assigned METROPCS, INC. 5562 ROSEVILLE MI
2007-10-04 586-563-5XXX 5000–5999Assigned METROPCS, INC. 5562 ROSEVILLE MI
2007-10-04 586-738-8XXX 8000–8999Assigned METROPCS, INC. 5562 MT CLEMENS MI
2007-10-04 586-843-6XXX 6000–6999Assigned METROPCS, INC. 5562 UTICA MI
2007-10-04 586-843-9XXX 9000–9999Assigned METROPCS, INC. 5562 UTICA MI
2007-09-11 586-625-6XXX 6000–6999Assigned METROPCS, INC. 5562 ARMADA MI
2007-09-11 586-625-7XXX 7000–7999Assigned METROPCS, INC. 5562 ARMADA MI
2007-09-11 586-935-7XXX 7000–7999Assigned METROPCS, INC. 5562 WASHINGTON MI
2007-09-11 586-935-8XXX 8000–8999Assigned METROPCS, INC. 5562 WASHINGTON MI
2007-09-04 586-218-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROSEVILLE MI
2007-09-04 586-601-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROSEVILLE MI
2007-09-04 586-601-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROSEVILLE MI
2007-08-14 586-804-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2007-08-08 586-565-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2007-08-08 586-565-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2007-08-03 586-569-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MT CLEMENS MI
2007-08-03 586-569-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MT CLEMENS MI
2007-07-11 586-275-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J WARREN MI
2007-07-06 586-232-1XXX 1000–1999Assigned WOW! INTERNET, CABLE AND PHONE 961J WASHINGTON MI
2007-07-06 586-362-8XXX 8000–8999Assigned WOW! INTERNET, CABLE AND PHONE 961J ROSEVILLE MI
2007-07-06 586-477-1XXX 1000–1999Assigned WOW! INTERNET, CABLE AND PHONE 961J MT CLEMENS MI
2007-07-06 586-486-4XXX 4000–4999Assigned WOW! INTERNET, CABLE AND PHONE 961J CENTERLINE MI
2007-07-06 586-737-7XXX 7000–7999Assigned WOW! INTERNET, CABLE AND PHONE 961J UTICA MI
2007-07-06 586-983-8XXX 8000–8999Assigned WOW! INTERNET, CABLE AND PHONE 961J WARREN MI
2007-07-03 586-859-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROSEVILLE MI
2007-07-03 586-859-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROSEVILLE MI
2007-06-26 586-744-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 WARREN MI
2007-06-13 586-580-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J UTICA MI
2007-06-13 586-803-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J UTICA MI
2007-06-11 586-443-0XXX 0000–0999Assigned METROPCS, INC. 5562 ROSEVILLE MI
2007-06-11 586-443-3XXX 3000–3999Assigned METROPCS, INC. 5562 ROSEVILLE MI
2007-06-11 586-443-6XXX 6000–6999Assigned METROPCS, INC. 5562 ROSEVILLE MI
2007-06-11 586-879-1XXX 1000–1999Assigned METROPCS, INC. 5562 ROSEVILLE MI
2007-05-24 586-329-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C MT CLEMENS MI
2007-05-14 586-879-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROSEVILLE MI
2007-05-11 586-868-9XXX 9000–9999Assigned MICHIGAN BELL TEL CO 9323 MT CLEMENS MI
2007-04-20 586-491-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J ROSEVILLE MI
2007-04-09 586-438-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 WARREN 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.