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 813
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2005-05-19 | 813-479-4XXX | 4000–4999 | Assigned | LINGO TELECOM, LLC | 3840 | ZEPHYRHILS | FL |
| 2005-05-09 | 813-470-4XXX | 4000–4999 | Assigned | LINGO TELECOM, LLC | 3840 | TAMPACEN | FL |
| 2004-12-08 | 813-343-7XXX | 7000–7999 | Assigned | LINGO TELECOM, LLC | 3840 | TAMPAWST | FL |
| 2004-04-06 | 813-473-5XXX | 5000–5999 | Assigned | LINGO TELECOM, LLC | 3840 | PLANT CITY | FL |
| 2004-02-17 | 813-435-4XXX | 4000–4999 | Assigned | LINGO TELECOM, LLC | 3840 | TAMPANTH | FL |
| 2004-02-09 | 813-658-7XXX | 7000–7999 | Assigned | LINGO TELECOM, LLC | 3840 | TAMPASTH | FL |
| 2004-02-09 | 813-793-3XXX | 3000–3999 | Assigned | LINGO TELECOM, LLC | 3840 | TAMPAEST | FL |
| 2004-01-06 | 813-600-4XXX | 4000–4999 | Assigned | LINGO TELECOM, LLC | 3840 | TAMPACEN | FL |
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.