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 |
|---|---|---|---|---|---|---|---|
| 2015-07-17 | 586-828-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | MT CLEMENS | MI |
| 2015-07-17 | 586-828-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | MT CLEMENS | MI |
| 2015-07-17 | 586-828-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | MT CLEMENS | MI |
| 2015-07-17 | 586-828-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | MT CLEMENS | MI |
| 2015-07-17 | 586-828-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | MT CLEMENS | MI |
| 2015-07-14 | 586-237-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | WARREN | MI |
| 2015-07-14 | 586-237-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | WARREN | MI |
| 2015-07-14 | 586-237-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | WARREN | MI |
| 2015-07-14 | 586-237-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | WARREN | MI |
| 2015-07-14 | 586-237-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | WARREN | MI |
| 2015-07-14 | 586-237-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | WARREN | MI |
| 2015-07-14 | 586-237-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | WARREN | MI |
| 2015-07-07 | 586-204-3XXX | 3000–3999 | Assigned | COMCAST IP PHONE, LLC | 318J | ROSEVILLE | MI |
| 2015-06-30 | 586-237-7XXX | 7000–7999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | WARREN | MI |
| 2015-06-30 | 586-237-8XXX | 8000–8999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | WARREN | MI |
| 2015-06-30 | 586-237-9XXX | 9000–9999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | WARREN | MI |
| 2015-06-30 | 586-459-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CENTERLINE | MI |
| 2015-06-30 | 586-459-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CENTERLINE | MI |
| 2015-06-30 | 586-459-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CENTERLINE | MI |
| 2015-06-30 | 586-733-0XXX | 0000–0999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | WARREN | MI |
| 2015-06-30 | 586-733-1XXX | 1000–1999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | WARREN | MI |
| 2015-06-30 | 586-733-2XXX | 2000–2999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | WARREN | MI |
| 2015-06-30 | 586-733-3XXX | 3000–3999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | WARREN | MI |
| 2015-06-30 | 586-733-4XXX | 4000–4999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | WARREN | MI |
| 2015-06-30 | 586-733-5XXX | 5000–5999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | WARREN | MI |
| 2015-06-30 | 586-733-6XXX | 6000–6999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | WARREN | MI |
| 2015-06-30 | 586-733-7XXX | 7000–7999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | WARREN | MI |
| 2015-06-30 | 586-733-8XXX | 8000–8999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | WARREN | MI |
| 2015-06-30 | 586-733-9XXX | 9000–9999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | WARREN | MI |
| 2015-06-23 | 586-200-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ROSEVILLE | MI |
| 2015-06-23 | 586-217-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ROSEVILLE | MI |
| 2015-06-23 | 586-343-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ROSEVILLE | MI |
| 2015-06-23 | 586-343-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ROSEVILLE | MI |
| 2015-06-23 | 586-359-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ROSEVILLE | MI |
| 2015-06-11 | 586-433-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | MT CLEMENS | MI |
| 2015-06-11 | 586-433-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | MT CLEMENS | MI |
| 2015-06-11 | 586-433-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | MT CLEMENS | MI |
| 2015-06-11 | 586-433-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | MT CLEMENS | MI |
| 2015-06-11 | 586-433-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | MT CLEMENS | MI |
| 2015-06-11 | 586-433-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | MT CLEMENS | MI |
| 2015-06-11 | 586-433-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | MT CLEMENS | MI |
| 2015-06-11 | 586-433-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | MT CLEMENS | MI |
| 2015-06-11 | 586-433-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | MT CLEMENS | MI |
| 2015-06-11 | 586-433-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | MT CLEMENS | MI |
| 2015-06-11 | 586-487-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | WARREN | MI |
| 2015-06-11 | 586-487-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | WARREN | MI |
| 2015-06-11 | 586-487-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | WARREN | MI |
| 2015-06-11 | 586-487-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | WARREN | MI |
| 2015-06-11 | 586-487-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | WARREN | MI |
| 2015-06-11 | 586-487-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | 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.