NumberResearchThousands-blocks in 781-957
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 781-957 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 |
|---|---|---|---|---|---|---|---|
| — | 781-957-0XXX | 0000–0999 | Reserved | PAETEC ITEL, LLC | 829J | MEDFORD | MA |
| 2011-06-28 | 781-957-1XXX | 1000–1999 | Assigned | PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA | 268F | MEDFORD | MA |
| — | 781-957-2XXX | 2000–2999 | Reserved | PAETEC ITEL, LLC | 829J | MEDFORD | MA |
| 2014-08-29 | 781-957-3XXX | 3000–3999 | Assigned | ONVOY, LLC - MA | 892D | MEDFORD | MA |
| 2014-08-29 | 781-957-4XXX | 4000–4999 | Assigned | ONVOY, LLC - MA | 892D | MEDFORD | MA |
| 2017-06-15 | 781-957-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | MEDFORD | MA |
| 2019-09-10 | 781-957-6XXX | 6000–6999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | MEDFORD | MA |
| 2019-10-30 | 781-957-7XXX | 7000–7999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | MEDFORD | MA |
| 2014-11-14 | 781-957-8XXX | 8000–8999 | Assigned | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | MEDFORD | MA |
| 2016-06-01 | 781-957-9XXX | 9000–9999 | Assigned | IP HORIZON LLC | 515J | MEDFORD | 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.