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 971
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2018-10-30 | 971-326-6XXX | 6000–6999 | Assigned | INVOXIO INCORPORATED | 158H | SEASIDE | OR |
| 2018-10-25 | 971-899-9XXX | 9000–9999 | Assigned | INVOXIO INCORPORATED | 158H | RAINIER | OR |
| 2018-10-25 | 971-988-8XXX | 8000–8999 | Assigned | INVOXIO INCORPORATED | 158H | ASTORIA | OR |
| 2018-10-23 | 971-247-0XXX | 0000–0999 | Assigned | INVOXIO INCORPORATED | 158H | NORTH PL | OR |
| 2018-10-23 | 971-432-2XXX | 2000–2999 | Assigned | INVOXIO INCORPORATED | 158H | WOODBURN | OR |
| 2018-09-12 | 971-399-9XXX | 9000–9999 | Assigned | INVOXIO INCORPORATED | 158H | FALLS CITY | OR |
| 2018-09-07 | 971-799-9XXX | 9000–9999 | Assigned | INVOXIO INCORPORATED | 158H | WESTPORT | OR |
| 2018-09-05 | 971-286-6XXX | 6000–6999 | Assigned | INVOXIO INCORPORATED | 158H | WARRENTON | OR |
| 2018-09-05 | 971-289-9XXX | 9000–9999 | Assigned | INVOXIO INCORPORATED | 158H | DALLAS | OR |
| 2018-09-05 | 971-308-2XXX | 2000–2999 | Assigned | INVOXIO INCORPORATED | 158H | CANNON BCH | OR |
| 2018-09-05 | 971-335-5XXX | 5000–5999 | Assigned | INVOXIO INCORPORATED | 158H | CLACKAMAS | OR |
| 2018-09-05 | 971-757-7XXX | 7000–7999 | Assigned | INVOXIO INCORPORATED | 158H | ST HELENS | OR |
| 2018-08-24 | 971-900-0XXX | 0000–0999 | Assigned | INVOXIO INCORPORATED | 158H | SALEM | OR |
| 2018-08-17 | 971-990-0XXX | 0000–0999 | Assigned | INVOXIO INCORPORATED | 158H | PORTLAND | OR |
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.