Optimum Online

Data as of 2026-08-09
BGP inherited
Complete entity footprint
5 linked clusters · 413 netblocks · 5,321,335 IPv4 addresses · 25 IPv6 prefixes
This organisation's clusters combined by evidence — shared operating domain optonline.net — not name similarity, so genuinely different organisations that share a name are excluded.
View the full entity page →
Cluster stats
Netblocks107 · 4,051,712 IPv4 addresses
IPv6 3 prefixes (largest 2600:4800::/28)
All fragments 139 blocks across 2 clusters
Cluster ID218143663
RegistryBGP
Customersfind customers using this network →
Evidence & provenance ?
Attribution BGP parent (inherited)
Shared handles clustered on 7 shared RIR contact/maintainer handles
Registry names 2 distinct registrant names across these blocks
full provenance (JSON) → · how attribution works · report an issue

Footprint over time

7 weekly snapshots · JSON
116 +33 netblocks since 2026-07-05
2026-07-05 peak 116 2026-08-09

IP Ranges (107)

showing 50 of 107 — see all⬇ export CSV
CIDR Org name Registry Status Confidence
24.246.128.0/18 Optimum Online BGP ANNOUNCED ● high
24.246.129.0/24 Optimum Online BGP ANNOUNCED ● high
24.246.130.0/24 Optimum Online BGP ANNOUNCED ● high
24.246.132.0/23 Optimum Online BGP ANNOUNCED ● high
24.246.134.0/24 Optimum Online BGP ANNOUNCED ● high
24.246.136.0/22 Optimum Online BGP ANNOUNCED ● high
24.246.140.0/22 Optimum Online BGP ANNOUNCED ● high
24.246.144.0/23 Optimum Online BGP ANNOUNCED ● high
24.246.146.0/23 Optimum Online BGP ANNOUNCED ● high
24.246.148.0/24 Optimum Online BGP ANNOUNCED ● high
24.246.149.0/24 Optimum Online BGP ANNOUNCED ● high
24.246.150.0/24 Optimum Online BGP ANNOUNCED ● high
24.246.152.0/24 Optimum Online BGP ANNOUNCED ● high
24.246.153.0/24 Optimum Online BGP ANNOUNCED ● high
24.246.154.0/24 Optimum Online BGP ANNOUNCED ● high
24.246.155.0/24 Optimum Online BGP ANNOUNCED ● high
24.246.156.0/23 Optimum Online BGP ANNOUNCED ● high
24.246.158.0/24 Optimum Online BGP ANNOUNCED ● high
24.246.159.0/24 Optimum Online BGP ANNOUNCED ● high
24.246.160.0/20 Optimum Online BGP ANNOUNCED ● high
24.246.176.0/22 Optimum Online BGP ANNOUNCED ● high
24.246.180.0/22 Optimum Online BGP ANNOUNCED ● high
24.246.184.0/22 Optimum Online BGP ANNOUNCED ● high
24.246.188.0/23 Optimum Online BGP ANNOUNCED ● high
24.246.190.0/24 Optimum Online BGP ANNOUNCED ● high
24.246.191.0/24 Optimum Online BGP ANNOUNCED ● high
63.143.128.0/20 Optimum Online BGP ANNOUNCED ● high
63.143.128.0/17 Optimum Online BGP ANNOUNCED ● high
63.143.144.0/22 Optimum Online BGP ANNOUNCED ● high
63.143.148.0/24 Optimum Online BGP ANNOUNCED ● high
63.143.149.0/24 Optimum Online BGP ANNOUNCED ● high
63.143.150.0/23 Optimum Online BGP ANNOUNCED ● high
63.143.152.0/22 Optimum Online BGP ANNOUNCED ● high
63.143.159.0/24 Optimum Online BGP ANNOUNCED ● high
63.143.160.0/20 Optimum Online BGP ANNOUNCED ● high
63.143.176.0/20 Optimum Online BGP ANNOUNCED ● high
63.143.192.0/20 Optimum Online BGP ANNOUNCED ● high
63.143.208.0/22 Optimum Online BGP ANNOUNCED ● high
64.127.208.0/20 Optimum Online BGP ANNOUNCED ● high
64.127.208.0/24 Optimum Online BGP ANNOUNCED ● high
64.127.209.0/24 Optimum Online BGP ANNOUNCED ● high
64.127.210.0/24 Optimum Online BGP ANNOUNCED ● high
64.127.211.0/24 Optimum Online BGP ANNOUNCED ● high
64.127.212.0/24 Optimum Online BGP ANNOUNCED ● high
64.127.215.0/24 Optimum Online BGP ANNOUNCED ● high
64.127.216.0/24 Optimum Online BGP ANNOUNCED ● high
64.127.217.0/24 Optimum Online BGP ANNOUNCED ● high
64.127.218.0/24 Optimum Online BGP ANNOUNCED ● high
64.127.219.0/24 Optimum Online BGP ANNOUNCED ● high
64.127.222.0/24 Optimum Online BGP ANNOUNCED ● high

IPv6 ranges (3)

Domains hosted in this network

what's this?

Customer-delegated space

how is this classified?
Unclassified 90 (84.1%)
Customer access pools 26 (24.3%)

Network trust

what's this?
RPKI hygiene: A how networks compare →
96.6% of checked blocks have valid RPKI ROA coverage (112 of 116)
Possible discrepancies (21)

These blocks are registered to Optimum Online but cryptographically authorized for a different, unrelated network (1 distinct holder) — often M&A history, multi-homing, or outsourced/managed hosting, occasionally worth a closer look.

2600:4800::/28 /28 authorized for AS6128 — Cablevision Systems Corp.
2001:48a0::/32 /32 authorized for AS6128 — Cablevision Systems Corp.
69.112.0.0/12 /12 authorized for AS6128 — Cablevision Systems Corp.
67.80.0.0/13 /13 authorized for AS6128 — Cablevision Systems Corp.
68.192.0.0/13 /13 authorized for AS6128 — Cablevision Systems Corp.
24.184.0.0/14 /14 authorized for AS6128 — Cablevision Systems Corp.
24.188.0.0/14 /14 authorized for AS6128 — Cablevision Systems Corp.
24.44.0.0/14 /14 authorized for AS6128 — Cablevision Systems Corp.
47.20.0.0/14 /14 authorized for AS6128 — Cablevision Systems Corp.
173.2.0.0/15 /15 authorized for AS6128 — Cablevision Systems Corp.
174.44.0.0/16 /16 authorized for AS6128 — Cablevision Systems Corp.
24.228.0.0/16 /16 authorized for AS6128 — Cablevision Systems Corp.
144.62.128.0/17 /17 authorized for AS6128 — Cablevision Systems Corp.
104.148.128.0/17 /17 authorized for AS6128 — Cablevision Systems Corp.
104.246.0.0/17 /17 authorized for AS6128 — Cablevision Systems Corp.
+6 more — see the REST API

NIC Handles

AS53488 C09025123 C10852773 OH4-ORG-ARIN OH4-ORG-ARIN OH4-ORG-ARIN OPTO