optonline.net
One organisation, resolved across 5 separately-registered clusters
linked by shared operating domain optonline.net — not name similarity, so
genuinely different organisations that share a name are excluded.
Data as of 2026-10-25
5 clusters ·
412 netblocks ·
5,321,319 IPv4 addresses ·
25 IPv6 prefixes
IPv6 ranges (25)
- 2600:4800::/28
- 2600:4800::/30
- 2600:4804::/30
- 2600:4808::/30
- 2600:480c::/30
- 2001:48a0::/32
- 2600:4808::/32
- 2600:4809::/32
- 2600:480a::/32
- 2600:480b::/32
- 2602:230::/32
- 2607:ce00::/32
- 2001:df7:8100::/48
- 2620:0:50a0::/48
- 2a00:2381:373::/48
- 2a00:2381:373:300::/56
- 2a00:2381:373::/56
- 2a00:2381:fe27:200::/56
- 2001:504:0:2::6128:1/128
- 2001:504:0:4::6128:1/128
- 2001:504:0:4::6128:2/128
- 2001:504:1::a500:6128:3/128
- 2001:504:1::a500:6128:4/128
- 2001:504:f::11/128
- 2001:504:f::75/128
Member clusters
- Cablevision Systems Corp. 129 netblocks
- Static IP Services 119 netblocks
- Optimum Online 116 netblocks
- CSC Holdings Inc., FR 90 netblocks
- Optimum WiFi 14 netblocks