NumberResearchThousands-blocks in 518-278
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 518-278 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 518 blocks
Most active assignees, all time — NPA 518
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 |
|---|---|---|---|---|---|---|---|
| 2012-07-31 | 518-278-0XXX | 0000–0999 | Assigned | ONVOY, LLC- NY | 384C | JONESVILLE | NY |
| — | 518-278-1XXX | 1000–1999 | Available | JONESVILLE | NY | ||
| 2000-10-19 | 518-278-2XXX | 2000–2999 | Assigned | TC SYSTEMS, INC. - NY | 7140 | JONESVILLE | NY |
| 2021-03-08 | 518-278-3XXX | 3000–3999 | Assigned | TERRA NOVA TELECOM INC. | 145J | JONESVILLE | NY |
| 2004-06-24 | 518-278-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - NY | 4006 | JONESVILLE | NY |
| 2006-09-06 | 518-278-5XXX | 5000–5999 | Assigned | RINGSQUARED TELECOM LLC | 8249 | JONESVILLE | NY |
| 2012-12-20 | 518-278-6XXX | 6000–6999 | Assigned | ONVOY, LLC- NY | 384C | JONESVILLE | NY |
| 2012-03-12 | 518-278-7XXX | 7000–7999 | Assigned | ONVOY, LLC- NY | 384C | JONESVILLE | NY |
| — | 518-278-8XXX | 8000–8999 | Reserved | TVC ALBANY, INC. DBA FIRSTLIGHT FIBER | 7989 | JONESVILLE | NY |
| 2002-04-24 | 518-278-9XXX | 9000–9999 | Assigned | LEVEL 3 TELECOM OF NEW YORK, LP - NY | 8473 | JONESVILLE | NY |
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.