NumberResearchThousands-blocks in 813-364
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/20/2026
The ten 1,000-number thousand-blocks inside prefix 813-364 and who was initially assigned each. Under pooling these blocks often belong to different carriers — the single prefix-level “assignee” is usually just the pool / code holder, not who holds the numbers. ← all 813 blocks
Most active assignees, all time — NPA 813
New assignments by month
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2010-10-06 | 813-364-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | ZEPHYRHILS | FL |
| 2005-06-27 | 813-364-1XXX | 1000–1999 | Assigned | MCI WORLDCOM COMMUNICATIONS, INC. - FL | 7448 | ZEPHYRHILS | FL |
| 2010-10-11 | 813-364-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - FL | 982E | ZEPHYRHILS | FL |
| 2010-12-29 | 813-364-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | ZEPHYRHILS | FL |
| 2011-04-25 | 813-364-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - FL | 982E | ZEPHYRHILS | FL |
| — | 813-364-5XXX | 5000–5999 | Reserved | TELEPORT COMMUNICATIONS AMERICA, LLC - FL | 8300 | ZEPHYRHILS | FL |
| 2005-06-27 | 813-364-6XXX | 6000–6999 | Assigned | ONVOY, LLC - FL | 937C | ZEPHYRHILS | FL |
| 2005-06-27 | 813-364-7XXX | 7000–7999 | Assigned | ONVOY, LLC - FL | 937C | ZEPHYRHILS | FL |
| 2024-01-31 | 813-364-8XXX | 8000–8999 | Assigned | ONVOY, LLC - FL | 937C | ZEPHYRHILS | FL |
| 2011-03-14 | 813-364-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | ZEPHYRHILS | FL |
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.