NumberResearchThousands-blocks in 617-741
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 617-741 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 617 blocks
Most active assignees, all time — NPA 617
New assignments by month
Sep 2026
Aug 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2021-03-23 | 617-741-0XXX | 0000–0999 | Assigned | ONVOY, LLC - MA | 892D | SOMERVILLE | MA |
| 2025-09-23 | 617-741-1XXX | 1000–1999 | Assigned | TERRA NOVA TELECOM INC. | 145J | SOMERVILLE | MA |
| 2016-03-18 | 617-741-2XXX | 2000–2999 | Assigned | HD CARRIER LLC | 321J | SOMERVILLE | MA |
| 2021-01-22 | 617-741-3XXX | 3000–3999 | Assigned | PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA | 268F | SOMERVILLE | MA |
| — | 617-741-4XXX | 4000–4999 | Reserved | LEVEL 3 COMMUNICATIONS, LLC - MA | 4018 | SOMERVILLE | MA |
| 2020-05-26 | 617-741-5XXX | 5000–5999 | Assigned | ONVOY, LLC - MA | 892D | SOMERVILLE | MA |
| — | 617-741-6XXX | 6000–6999 | Reserved | LEVEL 3 COMMUNICATIONS, LLC - MA | 4018 | SOMERVILLE | MA |
| 2020-05-26 | 617-741-7XXX | 7000–7999 | Assigned | ONVOY, LLC - MA | 892D | SOMERVILLE | MA |
| 2020-05-26 | 617-741-8XXX | 8000–8999 | Assigned | ONVOY, LLC - MA | 892D | SOMERVILLE | MA |
| 2020-04-28 | 617-741-9XXX | 9000–9999 | Assigned | PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA | 268F | SOMERVILLE | MA |
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.