NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026
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 731
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2020-07-16 | 731-529-3XXX | 3000–3999 | Assigned | FRACTEL, LLC | 965H | MICHIE | TN |
| 2020-07-16 | 731-529-9XXX | 9000–9999 | Assigned | FRACTEL, LLC | 965H | MICHIE | TN |
| 2020-07-09 | 731-244-4XXX | 4000–4999 | Assigned | FRACTEL, LLC | 965H | SELMER | TN |
| 2020-07-09 | 731-500-0XXX | 0000–0999 | Assigned | FRACTEL, LLC | 965H | PARSONS | TN |
| 2020-07-09 | 731-500-5XXX | 5000–5999 | Assigned | FRACTEL, LLC | 965H | PARSONS | TN |
| 2020-07-09 | 731-888-3XXX | 3000–3999 | Assigned | FRACTEL, LLC | 965H | BIG SANDY | TN |
| 2020-07-09 | 731-888-5XXX | 5000–5999 | Assigned | FRACTEL, LLC | 965H | BIG SANDY | TN |
| 2020-07-09 | 731-888-6XXX | 6000–6999 | Assigned | FRACTEL, LLC | 965H | BIG SANDY | TN |
| 2020-07-09 | 731-944-4XXX | 4000–4999 | Assigned | FRACTEL, LLC | 965H | SO FULTON | TN |
| 2020-06-11 | 731-900-0XXX | 0000–0999 | Assigned | FRACTEL, LLC | 965H | BIG SANDY | TN |
| 2020-06-11 | 731-900-7XXX | 7000–7999 | Assigned | FRACTEL, LLC | 965H | BIG SANDY | TN |
| 2020-06-11 | 731-900-9XXX | 9000–9999 | Assigned | FRACTEL, LLC | 965H | BIG SANDY | TN |
| 2019-11-29 | 731-433-3XXX | 3000–3999 | Assigned | FRACTEL, LLC | 965H | GRAND JCT | TN |
| 2019-11-29 | 731-444-5XXX | 5000–5999 | Assigned | FRACTEL, LLC | 965H | JACKSON | TN |
| 2019-11-29 | 731-444-7XXX | 7000–7999 | Assigned | FRACTEL, LLC | 965H | JACKSON | TN |
| 2019-11-29 | 731-444-8XXX | 8000–8999 | Assigned | FRACTEL, LLC | 965H | JACKSON | TN |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.