NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026
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 720
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2022-09-26 | 720-801-3XXX | 3000–3999 | Assigned | HD CARRIER LLC | 321J | GEORGETOWN | CO |
| 2022-09-26 | 720-801-9XXX | 9000–9999 | Assigned | HD CARRIER LLC | 321J | GEORGETOWN | CO |
| 2022-09-23 | 720-825-8XXX | 8000–8999 | Assigned | HD CARRIER LLC | 321J | DENVER | CO |
| 2022-09-23 | 720-825-9XXX | 9000–9999 | Assigned | HD CARRIER LLC | 321J | DENVER | CO |
| 2022-09-22 | 720-861-7XXX | 7000–7999 | Assigned | HD CARRIER LLC | 321J | GEORGETOWN | CO |
| 2020-04-02 | 720-716-6XXX | 6000–6999 | Assigned | HD CARRIER LLC | 321J | DENVER | CO |
| 2020-04-02 | 720-716-7XXX | 7000–7999 | Assigned | HD CARRIER LLC | 321J | DENVER | CO |
| 2019-08-30 | 720-740-9XXX | 9000–9999 | Assigned | HD CARRIER LLC | 321J | DECKERS | CO |
| 2018-12-04 | 720-830-9XXX | 9000–9999 | Assigned | HD CARRIER LLC | 321J | DENVER | CO |
| 2016-08-08 | 720-721-4XXX | 4000–4999 | Assigned | HD CARRIER LLC | 321J | DENVER | CO |
| 2016-08-08 | 720-721-5XXX | 5000–5999 | Assigned | HD CARRIER LLC | 321J | DENVER | CO |
| 2016-08-08 | 720-721-6XXX | 6000–6999 | Assigned | HD CARRIER LLC | 321J | DENVER | CO |
| 2016-08-08 | 720-721-8XXX | 8000–8999 | Assigned | HD CARRIER LLC | 321J | DENVER | CO |
| 2016-08-08 | 720-721-9XXX | 9000–9999 | Assigned | HD CARRIER LLC | 321J | DENVER | CO |
| 2016-08-08 | 720-835-3XXX | 3000–3999 | Assigned | HD CARRIER LLC | 321J | DENVER | CO |
| 2016-08-08 | 720-835-4XXX | 4000–4999 | Assigned | HD CARRIER LLC | 321J | DENVER | CO |
| 2016-08-08 | 720-835-5XXX | 5000–5999 | Assigned | HD CARRIER LLC | 321J | DENVER | CO |
| 2016-08-08 | 720-835-6XXX | 6000–6999 | Assigned | HD CARRIER LLC | 321J | DENVER | CO |
| 2016-04-22 | 720-721-0XXX | 0000–0999 | Assigned | HD CARRIER LLC | 321J | DENVER | CO |
| 2016-04-22 | 720-721-2XXX | 2000–2999 | Assigned | HD CARRIER LLC | 321J | DENVER | CO |
| 2016-04-22 | 720-721-7XXX | 7000–7999 | Assigned | HD CARRIER LLC | 321J | DENVER | CO |
| 2015-09-30 | 720-820-0XXX | 0000–0999 | Assigned | HD CARRIER LLC | 321J | DENVER | CO |
| 2015-09-30 | 720-820-2XXX | 2000–2999 | Assigned | HD CARRIER LLC | 321J | DENVER | CO |
| 2015-09-30 | 720-820-3XXX | 3000–3999 | Assigned | HD CARRIER LLC | 321J | DENVER | CO |
| 2015-09-30 | 720-820-4XXX | 4000–4999 | Assigned | HD CARRIER LLC | 321J | DENVER | CO |
| 2015-09-30 | 720-820-5XXX | 5000–5999 | Assigned | HD CARRIER LLC | 321J | DENVER | CO |
| 2015-09-30 | 720-820-6XXX | 6000–6999 | Assigned | HD CARRIER LLC | 321J | DENVER | CO |
| 2015-09-30 | 720-820-7XXX | 7000–7999 | Assigned | HD CARRIER LLC | 321J | DENVER | CO |
| 2015-09-30 | 720-820-8XXX | 8000–8999 | Assigned | HD CARRIER LLC | 321J | DENVER | CO |
| 2015-09-30 | 720-820-9XXX | 9000–9999 | Assigned | HD CARRIER LLC | 321J | DENVER | CO |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.