NumberResearchThousands-blocks in 781-923
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 781-923 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 781 blocks
Most active assignees, all time — NPA 781
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 |
|---|---|---|---|---|---|---|---|
| 2008-11-10 | 781-923-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - MA | 990E | COHASSET | MA |
| — | 781-923-1XXX | 1000–1999 | Reserved | COMCAST IP PHONE, LLC | 318J | COHASSET | MA |
| 2019-01-25 | 781-923-2XXX | 2000–2999 | Assigned | ONVOY, LLC - MA | 892D | COHASSET | MA |
| 2024-01-09 | 781-923-3XXX | 3000–3999 | Assigned | TERRA NOVA TELECOM INC. | 145J | COHASSET | MA |
| 2019-01-25 | 781-923-4XXX | 4000–4999 | Assigned | ONVOY, LLC - MA | 892D | COHASSET | MA |
| — | 781-923-5XXX | 5000–5999 | Assigned (pending) | COHASSET | MA | ||
| 2013-04-15 | 781-923-6XXX | 6000–6999 | Assigned | COMCAST IP PHONE, LLC | 318J | COHASSET | MA |
| 2013-04-05 | 781-923-7XXX | 7000–7999 | Assigned | PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA | 268F | COHASSET | MA |
| 2013-04-05 | 781-923-8XXX | 8000–8999 | Assigned | PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA | 268F | COHASSET | MA |
| 2016-06-01 | 781-923-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | COHASSET | 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.