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 571
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2022-03-04 | 571-626-2XXX | 2000–2999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | TRIANGLE | VA |
| 2022-02-25 | 571-727-2XXX | 2000–2999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | LORTON | VA |
| 2022-02-24 | 571-788-8XXX | 8000–8999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | HAYMARKET | VA |
| 2022-02-18 | 571-688-8XXX | 8000–8999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | INDENDNTHL | VA |
| 2022-02-18 | 571-742-6XXX | 6000–6999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | DULLESMTRO | VA |
| 2022-02-18 | 571-746-7XXX | 7000–7999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | DULLES | VA |
| 2022-02-18 | 571-832-4XXX | 4000–4999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | BRADDOCK | VA |
| 2021-09-23 | 571-574-7XXX | 7000–7999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | WSNGTNZN17 | VA |
| 2021-09-07 | 571-567-3XXX | 3000–3999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | WSNGTNZN19 | VA |
| 2021-08-10 | 571-786-3XXX | 3000–3999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | HERNDON | VA |
| 2021-04-07 | 571-866-2XXX | 2000–2999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | OCCOQUAN | VA |
| 2021-02-11 | 571-837-4XXX | 4000–4999 | Assigned | TON80 COMMUNICATIONS, LLC | 516J | LEESBURG | VA |
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.