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 |
|---|---|---|---|---|---|---|---|
| 2005-11-09 | 586-330-3XXX | 3000–3999 | Assigned | ACD TELECOM, INC. - MI | 3535 | NEWBALTIMR | MI |
| 2005-11-09 | 586-420-2XXX | 2000–2999 | Assigned | ACD TELECOM, INC. - MI | 3535 | ROSEVILLE | MI |
| 2005-11-09 | 586-430-3XXX | 3000–3999 | Assigned | ACD TELECOM, INC. - MI | 3535 | RICHMOND | MI |
| 2005-11-09 | 586-540-3XXX | 3000–3999 | Assigned | ACD TELECOM, INC. - MI | 3535 | ROMEO | MI |
| 2005-11-09 | 586-744-7XXX | 7000–7999 | Assigned | ACD TELECOM, INC. - MI | 3535 | WARREN | MI |
| 2005-11-09 | 586-930-3XXX | 3000–3999 | Assigned | ACD TELECOM, INC. - MI | 3535 | UTICA | MI |
| 2005-11-09 | 586-992-7XXX | 7000–7999 | Assigned | ACD TELECOM, INC. - MI | 3535 | WASHINGTON | MI |
| 2005-11-08 | 586-339-9XXX | 9000–9999 | Assigned | ACD TELECOM, INC. - MI | 3535 | NEW HAVEN | MI |
| 2005-11-08 | 586-510-8XXX | 8000–8999 | Assigned | ACD TELECOM, INC. - MI | 3535 | CENTERLINE | MI |
| 2005-11-08 | 586-588-8XXX | 8000–8999 | Assigned | ACD TELECOM, INC. - MI | 3535 | ARMADA | MI |
| 2005-11-08 | 586-840-9XXX | 9000–9999 | Assigned | ACD TELECOM, INC. - MI | 3535 | MT CLEMENS | 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 |
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.