NumberResearchThousands-blocks in 813-413
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 813-413 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
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2009-12-30 | 813-413-0XXX | 0000–0999 | Assigned | PAETEC ITEL, LLC | 829J | TAMPAEST | FL |
| 2005-02-07 | 813-413-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | TAMPAEST | FL |
| — | 813-413-2XXX | 2000–2999 | Available | TAMPAEST | FL | ||
| 2004-04-22 | 813-413-3XXX | 3000–3999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - FL | 8300 | TAMPAEST | FL |
| 2002-07-08 | 813-413-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | TAMPAEST | FL |
| 2004-08-24 | 813-413-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | TAMPAEST | FL |
| 2005-05-04 | 813-413-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | TAMPAEST | FL |
| 2005-05-04 | 813-413-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | TAMPAEST | FL |
| 2002-03-01 | 813-413-8XXX | 8000–8999 | Assigned | PAETEC ITEL, LLC | 829J | TAMPAEST | FL |
| 2003-01-17 | 813-413-9XXX | 9000–9999 | Assigned | TERRA NOVA TELECOM, INC. - FL | 382G | TAMPAEST | 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.