Autonomous system
AS19108 SUDDENLINK-COMMUNICATIONS
Unclassified ARIN
Summary
Optimum
cable residential isp fiber
SUDDENLINK-COMMUNICATIONS is the AS handle for Optimum, formerly known as Suddenlink Communications.
What it's used for
- The address space carries residential and business broadband services, evidenced by netnames such as
SUDDEandSUDDE-NETBLKregistered to Optimum. - With 2,840,320 IPv4 addresses and 70 IPv6 prefixes announced across 877 IPv4 prefixes, the inventory is extensive. The 91 observed neighbours indicate a large access network providing connectivity to end-users rather than a transit provider.
Notable
- All sampled registrants are listed as Optimum, consistent with the current branding of the operator.
- Suddenlink Communications was rebranded as Optimum, a subsidiary of Liberty Broadband, following its acquisition and integration into the Liberty Media group.
- The inventory includes large blocks in the 47.0.0.0/8 and 24.0.0.0/8 ranges, reflecting the historical accumulation of address space through mergers and acquisitions in the cable industry.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
Recorded at 4 exchanges in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| Equinix Internet Exchange Ashburn | Ashburn, United States | 206.126.236.72 |
| Equinix Internet Exchange Chicago | Chicago, United States | 208.115.136.72 |
| Equinix Internet Exchange Dallas | Dallas, United States | 206.223.118.74 |
| Equinix Internet Exchange San Jose (Bay Area) | San Jose, United States | 206.223.116.8 |
Transit providers
7 upstream, 72 downstream and 93 adjacent networks observed; most-used upstreams first.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-16, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 885 prefixes · 2.84M addresses IPv6 70 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 955 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS19108- Registry name
- SUDDENLINK-COMMUNICATIONS
- Registrant
- Optimum
- Abuse contact
- abuse@suddenlink.net
- Registered
- 2000-11-20
- Last changed
- 2012-03-20
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 6% valid · 25 valid, 410 with no ROA
- ROAs
- 27 authorising AS19108
- ASPA
- no ASPA record
- IRR
- 97% registered · 422 of 435 announcements 2 other origin
- Route objects
- 148 naming AS19108
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 442 networks and 1,783 prefixes, as published 2026-10-17. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere