NumberResearchThousands-blocks in 781-859
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 781-859 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
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2014-10-02 | 781-859-0XXX | 0000–0999 | Assigned | ONVOY, LLC - MA | 892D | ARLINGTON | MA |
| — | 781-859-1XXX | 1000–1999 | Reserved | PAETEC ITEL, LLC | 829J | ARLINGTON | MA |
| 2005-02-11 | 781-859-2XXX | 2000–2999 | Assigned | PAETEC ITEL, LLC | 829J | ARLINGTON | MA |
| 2014-05-02 | 781-859-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | ARLINGTON | MA |
| 2014-10-02 | 781-859-4XXX | 4000–4999 | Assigned | ONVOY, LLC - MA | 892D | ARLINGTON | MA |
| 2006-11-07 | 781-859-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | ARLINGTON | MA |
| 2007-08-13 | 781-859-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | ARLINGTON | MA |
| 2006-08-16 | 781-859-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | ARLINGTON | MA |
| 2004-07-02 | 781-859-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | ARLINGTON | MA |
| 2002-12-27 | 781-859-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | ARLINGTON | 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.