NumberResearchRecent thousands-block assignments
0 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, all time — NPA 586
New assignments by month
Sep 2026
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2008-09-09 | 586-350-0XXX | 0000–0999 | Assigned | WOW! INTERNET, CABLE AND PHONE | 961J | ROSEVILLE | MI |
| 2007-11-02 | 586-477-0XXX | 0000–0999 | Assigned | WOW! INTERNET, CABLE AND PHONE | 961J | MT CLEMENS | MI |
| 2007-10-08 | 586-932-2XXX | 2000–2999 | Assigned | WOW! INTERNET, CABLE AND PHONE | 961J | UTICA | MI |
| 2007-07-06 | 586-232-1XXX | 1000–1999 | Assigned | WOW! INTERNET, CABLE AND PHONE | 961J | WASHINGTON | MI |
| 2007-07-06 | 586-362-8XXX | 8000–8999 | Assigned | WOW! INTERNET, CABLE AND PHONE | 961J | ROSEVILLE | MI |
| 2007-07-06 | 586-477-1XXX | 1000–1999 | Assigned | WOW! INTERNET, CABLE AND PHONE | 961J | MT CLEMENS | MI |
| 2007-07-06 | 586-486-4XXX | 4000–4999 | Assigned | WOW! INTERNET, CABLE AND PHONE | 961J | CENTERLINE | MI |
| 2007-07-06 | 586-737-7XXX | 7000–7999 | Assigned | WOW! INTERNET, CABLE AND PHONE | 961J | UTICA | MI |
| 2007-07-06 | 586-983-8XXX | 8000–8999 | Assigned | WOW! INTERNET, CABLE AND PHONE | 961J | WARREN | MI |
| 2006-11-13 | 586-944-0XXX | 0000–0999 | Assigned | WOW! INTERNET, CABLE AND PHONE | 961J | ROSEVILLE | MI |
| 2006-11-13 | 586-944-2XXX | 2000–2999 | Assigned | WOW! INTERNET, CABLE AND PHONE | 961J | ROSEVILLE | MI |
| 2006-03-16 | 586-741-6XXX | 6000–6999 | Assigned | WOW! INTERNET, CABLE AND PHONE | 961J | MT CLEMENS | 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 |
| 2005-05-27 | 586-697-6XXX | 6000–6999 | Assigned | WOW! INTERNET, CABLE AND PHONE | 961J | WASHINGTON | MI |
| 2004-06-30 | 586-838-4XXX | 4000–4999 | Assigned | WOW! INTERNET, CABLE AND PHONE | 961J | WARREN | MI |
| 2004-06-30 | 586-838-5XXX | 5000–5999 | Assigned | WOW! INTERNET, CABLE AND PHONE | 961J | WARREN | MI |
| 2004-06-29 | 586-932-6XXX | 6000–6999 | Assigned | WOW! INTERNET, CABLE AND PHONE | 961J | UTICA | 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.