NumberResearchThousands-blocks in 351-465
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 351-465 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 351 blocks
Most active assignees, all time — NPA 351
New assignments by month
Sep 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 351-465-0XXX | 0000–0999 | Available | MANCHESTER | MA | ||
| 2021-12-21 | 351-465-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | MANCHESTER | MA |
| 2021-12-21 | 351-465-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | MANCHESTER | MA |
| 2021-07-15 | 351-465-3XXX | 3000–3999 | Assigned | ONVOY, LLC - MA | 892D | MANCHESTER | MA |
| 2021-07-15 | 351-465-4XXX | 4000–4999 | Assigned | ONVOY, LLC - MA | 892D | MANCHESTER | MA |
| 2021-06-11 | 351-465-5XXX | 5000–5999 | Assigned | ONVOY, LLC - MA | 892D | MANCHESTER | MA |
| 2021-06-11 | 351-465-6XXX | 6000–6999 | Assigned | ONVOY, LLC - MA | 892D | MANCHESTER | MA |
| — | 351-465-7XXX | 7000–7999 | Available | MANCHESTER | MA | ||
| 2021-04-26 | 351-465-8XXX | 8000–8999 | Assigned | FRACTEL, LLC | 965H | MANCHESTER | MA |
| — | 351-465-9XXX | 9000–9999 | Available | MANCHESTER | MA |
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.