NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/24/2026
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 423
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2024-03-13 | 423-375-6XXX | 6000–6999 | Assigned | TWIN LAKES COMMUNICATIONS, INC. - TN | 204G | BENTON | TN |
| 2022-11-30 | 423-568-1XXX | 1000–1999 | Assigned | TWIN LAKES COMMUNICATIONS, INC. - TN | 204G | NIOTA | TN |
| 2022-11-30 | 423-730-8XXX | 8000–8999 | Assigned | TWIN LAKES COMMUNICATIONS, INC. - TN | 204G | RICEVILLE | TN |
| 2022-11-30 | 423-810-3XXX | 3000–3999 | Assigned | TWIN LAKES COMMUNICATIONS, INC. - TN | 204G | CHARLESTON | TN |
| 2022-11-30 | 423-932-0XXX | 0000–0999 | Assigned | TWIN LAKES COMMUNICATIONS, INC. - TN | 204G | ETOWAH | TN |
| 2022-03-08 | 423-696-0XXX | 0000–0999 | Assigned | TWIN LAKES COMMUNICATIONS, INC. - TN | 204G | ROGERSVL | TN |
| 2022-03-08 | 423-759-1XXX | 1000–1999 | Assigned | TWIN LAKES COMMUNICATIONS, INC. - TN | 204G | MORRISTOWN | TN |
| 2020-11-11 | 423-589-8XXX | 8000–8999 | Assigned | TWIN LAKES COMMUNICATIONS, INC. - TN | 204G | GEORGETOWN | TN |
| 2020-11-11 | 423-910-8XXX | 8000–8999 | Assigned | TWIN LAKES COMMUNICATIONS, INC. - TN | 204G | OOLTEWAH | TN |
| 2020-01-14 | 423-407-1XXX | 1000–1999 | Assigned | TWIN LAKES COMMUNICATIONS, INC. - TN | 204G | SPRINGCITY | TN |
| 2019-09-09 | 423-466-0XXX | 0000–0999 | Assigned | TWIN LAKES COMMUNICATIONS, INC. - TN | 204G | ATHENS | TN |
| 2019-06-25 | 423-632-1XXX | 1000–1999 | Assigned | TWIN LAKES COMMUNICATIONS, INC. - TN | 204G | WARTBURG | TN |
| 2019-06-19 | 423-577-1XXX | 1000–1999 | Assigned | TWIN LAKES COMMUNICATIONS, INC. - TN | 204G | ONEIDA | TN |
| 2019-02-25 | 423-565-1XXX | 1000–1999 | Assigned | TWIN LAKES COMMUNICATIONS, INC. - TN | 204G | DECATUR | TN |
| 2017-04-27 | 423-250-0XXX | 0000–0999 | Assigned | TWIN LAKES COMMUNICATIONS, INC. - TN | 204G | CLEVELAND | TN |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/24/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.