NumberResearchThousands-blocks in 717-308
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/19/2026
The ten 1,000-number thousand-blocks inside prefix 717-308 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 717 blocks
Most active assignees, all time — NPA 717
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| — | 717-308-0XXX | 0000–0999 | Reserved | VERIZON NORTH, INC. - PA | 0169 | DOVER | PA |
| 2021-11-02 | 717-308-1XXX | 1000–1999 | Assigned | TERRA NOVA TELECOM INC. | 145J | DOVER | PA |
| — | 717-308-2XXX | 2000–2999 | Reserved | VERIZON NORTH, INC. - PA | 0169 | DOVER | PA |
| 2005-03-10 | 717-308-3XXX | 3000–3999 | Assigned | WINDSTREAM D & E SYSTEMS, INC. - PA | 4114 | DOVER | PA |
| 2009-03-11 | 717-308-4XXX | 4000–4999 | Assigned | CORE COMMUNICATIONS, INC. - PA | 3806 | DOVER | PA |
| 2008-09-10 | 717-308-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | DOVER | PA |
| 2006-10-04 | 717-308-6XXX | 6000–6999 | Assigned | CTSI, INC. - PA | 7513 | DOVER | PA |
| 2011-06-14 | 717-308-7XXX | 7000–7999 | Assigned | COMCAST IP PHONE, LLC | 318J | DOVER | PA |
| 2010-02-11 | 717-308-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - PA | 002F | DOVER | PA |
| 2016-07-11 | 717-308-9XXX | 9000–9999 | Assigned | PEERLESS NETWORK OF PENNSYLVANIA, LLC - PA | 967E | DOVER | PA |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.