NumberResearchThousands-blocks in 810-519
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/19/2026
The ten 1,000-number thousand-blocks inside prefix 810-519 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 810 blocks
Most active assignees, all time — NPA 810
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 |
|---|---|---|---|---|---|---|---|
| — | 810-519-0XXX | 0000–0999 | Available | FENTON | MI | ||
| — | 810-519-1XXX | 1000–1999 | Available | FENTON | MI | ||
| 2026-05-13 | 810-519-2XXX | 2000–2999 | Assigned | TERRA NOVA TELECOM INC. | 145J | FENTON | MI |
| 2003-09-03 | 810-519-3XXX | 3000–3999 | Assigned | PAETEC ITEL, LLC | 829J | FENTON | MI |
| — | 810-519-4XXX | 4000–4999 | Reserved | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | FENTON | MI |
| 2005-06-20 | 810-519-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | FENTON | MI |
| 2025-09-10 | 810-519-6XXX | 6000–6999 | Assigned | TERRA NOVA TELECOM INC. | 145J | FENTON | MI |
| — | 810-519-7XXX | 7000–7999 | Available | FENTON | MI | ||
| 2006-02-02 | 810-519-8XXX | 8000–8999 | Assigned | AT&T ENTERPRISES, LLC | 516C | FENTON | MI |
| 2024-12-04 | 810-519-9XXX | 9000–9999 | Assigned | TERRA NOVA TELECOM INC. | 145J | FENTON | MI |
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.