NumberResearchThousands-blocks in 781-499
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 781-499 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
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 781-499-0XXX | 0000–0999 | Reserved | TC SYSTEMS, INC. | 7135 | HANOVER | MA |
| — | 781-499-1XXX | 1000–1999 | Reserved | TC SYSTEMS, INC. | 7135 | HANOVER | MA |
| 2010-01-22 | 781-499-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - MA | 990E | HANOVER | MA |
| 2017-09-27 | 781-499-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | HANOVER | MA |
| 2022-10-04 | 781-499-4XXX | 4000–4999 | Assigned | TERRA NOVA TELECOM INC. | 145J | HANOVER | MA |
| 2008-07-17 | 781-499-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HANOVER | MA |
| 2006-04-28 | 781-499-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MA | 4018 | HANOVER | MA |
| 2010-12-08 | 781-499-7XXX | 7000–7999 | Assigned | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | HANOVER | MA |
| 2010-03-23 | 781-499-8XXX | 8000–8999 | Assigned | ONVOY, LLC - MA | 892D | HANOVER | MA |
| 2013-04-05 | 781-499-9XXX | 9000–9999 | Assigned | PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA | 268F | HANOVER | 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.