NumberResearchThousands-blocks in 813-473
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 813-473 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
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2016-01-14 | 813-473-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PLANT CITY | FL |
| 2016-02-25 | 813-473-1XXX | 1000–1999 | Assigned | IP HORIZON LLC | 515J | PLANT CITY | FL |
| 2011-04-22 | 813-473-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - FL | 982E | PLANT CITY | FL |
| — | 813-473-3XXX | 3000–3999 | Reserved | MCI WORLDCOM COMMUNICATIONS, INC. - FL | 7448 | PLANT CITY | FL |
| 2006-05-01 | 813-473-4XXX | 4000–4999 | Assigned | MCI WORLDCOM COMMUNICATIONS, INC. - FL | 7448 | PLANT CITY | FL |
| 2004-04-06 | 813-473-5XXX | 5000–5999 | Assigned | LINGO TELECOM, LLC | 3840 | PLANT CITY | FL |
| 2011-04-22 | 813-473-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - FL | 982E | PLANT CITY | FL |
| 2014-06-17 | 813-473-7XXX | 7000–7999 | Assigned | CENTURYLINK COMMUNICATIONS, LLC | 508J | PLANT CITY | FL |
| 2014-11-19 | 813-473-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | PLANT CITY | FL |
| 2016-01-14 | 813-473-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | PLANT CITY | 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.