NumberResearchRecent thousands-block assignments
2 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026
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 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
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2005-08-15 | 586-580-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | UTICA | MI |
| 2005-08-05 | 586-218-6XXX | 6000–6999 | Assigned | 123.NET, LLC | 2550 | ROSEVILLE | MI |
| 2005-08-05 | 586-218-7XXX | 7000–7999 | Assigned | WOW! INTERNET, CABLE AND PHONE | 961J | ROSEVILLE | MI |
| 2005-08-05 | 586-218-8XXX | 8000–8999 | Assigned | WOW! INTERNET, CABLE AND PHONE | 961J | ROSEVILLE | MI |
| 2005-08-05 | 586-339-3XXX | 3000–3999 | Assigned | 123.NET, LLC | 2550 | NEW HAVEN | MI |
| 2005-08-05 | 586-473-0XXX | 0000–0999 | Assigned | 123.NET, LLC | 2550 | ARMADA | MI |
| 2005-08-05 | 586-501-3XXX | 3000–3999 | Assigned | 123.NET, LLC | 2550 | CENTERLINE | MI |
| 2005-08-05 | 586-601-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | ROSEVILLE | MI |
| 2005-08-05 | 586-623-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | ROMEO | MI |
| 2005-08-05 | 586-935-1XXX | 1000–1999 | Assigned | 123.NET, LLC | 2550 | WASHINGTON | MI |
| 2005-08-03 | 586-218-5XXX | 5000–5999 | Assigned | TELNET WORLDWIDE, INC. | 817J | ROSEVILLE | MI |
| 2005-08-03 | 586-339-1XXX | 1000–1999 | Assigned | TELNET WORLDWIDE, INC. | 817J | NEW HAVEN | MI |
| 2005-08-03 | 586-697-7XXX | 7000–7999 | Assigned | TELNET WORLDWIDE, INC. | 817J | WASHINGTON | MI |
| 2005-07-26 | 586-330-2XXX | 2000–2999 | Assigned | PAETEC ITEL, LLC | 829J | NEWBALTIMR | MI |
| 2005-07-15 | 586-453-8XXX | 8000–8999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | ROMEO | MI |
| 2005-07-14 | 586-270-8XXX | 8000–8999 | Assigned | PAETEC ITEL, LLC | 829J | NEW HAVEN | MI |
| 2005-07-14 | 586-331-7XXX | 7000–7999 | Assigned | PAETEC ITEL, LLC | 829J | ROMEO | MI |
| 2005-07-07 | 586-203-7XXX | 7000–7999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | MT CLEMENS | MI |
| 2005-06-28 | 586-601-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | ROSEVILLE | MI |
| 2005-06-25 | 586-203-0XXX | 0000–0999 | Assigned | ACD TELECOM, INC. - MI | 3535 | MT CLEMENS | MI |
| 2005-06-25 | 586-207-8XXX | 8000–8999 | Assigned | ACD TELECOM, INC. - MI | 3535 | WASHINGTON | MI |
| 2005-06-25 | 586-218-2XXX | 2000–2999 | Assigned | ACD TELECOM, INC. - MI | 3535 | ROSEVILLE | MI |
| 2005-06-25 | 586-258-7XXX | 7000–7999 | Assigned | ACD TELECOM, INC. - MI | 3535 | WARREN | MI |
| 2005-06-25 | 586-262-8XXX | 8000–8999 | Assigned | ACD TELECOM, INC. - MI | 3535 | UTICA | MI |
| 2005-06-25 | 586-270-7XXX | 7000–7999 | Assigned | ACD TELECOM, INC. - MI | 3535 | NEW HAVEN | MI |
| 2005-06-25 | 586-273-8XXX | 8000–8999 | Assigned | ACD TELECOM, INC. - MI | 3535 | NEWBALTIMR | MI |
| 2005-06-25 | 586-281-8XXX | 8000–8999 | Assigned | ACD TELECOM, INC. - MI | 3535 | ROMEO | MI |
| 2005-06-25 | 586-430-2XXX | 2000–2999 | Assigned | ACD TELECOM, INC. - MI | 3535 | RICHMOND | MI |
| 2005-06-25 | 586-473-2XXX | 2000–2999 | Assigned | ACD TELECOM, INC. - MI | 3535 | ARMADA | MI |
| 2005-06-25 | 586-501-2XXX | 2000–2999 | Assigned | ACD TELECOM, INC. - MI | 3535 | CENTERLINE | MI |
| 2005-06-21 | 586-203-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | MT CLEMENS | MI |
| 2005-06-21 | 586-203-4XXX | 4000–4999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | MT CLEMENS | MI |
| 2005-06-21 | 586-331-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | ROMEO | MI |
| 2005-06-21 | 586-331-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | ROMEO | MI |
| 2005-06-21 | 586-569-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | MT CLEMENS | MI |
| 2005-06-21 | 586-569-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | MT CLEMENS | MI |
| 2005-06-21 | 586-601-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | ROSEVILLE | MI |
| 2005-06-21 | 586-722-0XXX | 0000–0999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | WARREN | MI |
| 2005-06-21 | 586-722-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | WARREN | MI |
| 2005-06-10 | 586-838-9XXX | 9000–9999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | WARREN | MI |
| 2005-06-01 | 586-693-5XXX | 5000–5999 | Assigned | AT&T ENTERPRISES, LLC | 516C | WARREN | MI |
| 2005-05-27 | 586-697-6XXX | 6000–6999 | Assigned | WOW! INTERNET, CABLE AND PHONE | 961J | WASHINGTON | MI |
| 2005-04-26 | 586-738-2XXX | 2000–2999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | MT CLEMENS | MI |
| 2005-04-20 | 586-601-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | ROSEVILLE | MI |
| 2005-04-13 | 586-303-7XXX | 7000–7999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | WARREN | MI |
| 2005-04-07 | 586-354-4XXX | 4000–4999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | WARREN | MI |
| 2005-03-21 | 586-623-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | ROMEO | MI |
| 2005-03-21 | 586-623-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | ROMEO | MI |
| 2005-03-18 | 586-222-0XXX | 0000–0999 | Assigned | PAETEC ITEL, LLC | 829J | ROSEVILLE | MI |
| 2005-03-18 | 586-486-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | 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.