AS3456 — TWC-3456-IT

Network type: residential

AS3456 announces 7 IPv4 prefixes covering 142,336 addresses and 5 IPv6 prefixes.

About this network

TWC-3456-IT is a legacy Time Warner Cable autonomous system, now held by Charter Communications, which acquired TWC in 2016 and operates the combined network under the Spectrum brand.

What it's used for

• Cable ISP address space inherited from Time Warner Cable, folded into Charter's network after the merger.
• Consumer and business broadband service rather than hosting or transit.

Notable

• This is eyeball address space: the hosts behind it are largely residential subscribers, so it behaves like a consumer ISP range.
• Charter holds a long tail of AS numbers absorbed from Time Warner Cable, Bright House, and Charter's own history. The TWC- handles are the clearest fingerprint of which lineage a given number came from.

Interesting

• The AS number outlives the brand. Time Warner Cable no longer exists as a company, but its registry handles keep showing up in routing data years later.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 67.48.224.0/19
• 142.136.0.0/16
• 165.237.0.0/16
• 192.219.231.0/24
• 204.29.131.0/24
• 204.235.112.0/21
• 204.235.120.0/23
• 2001:1998:2000::/35
• 2600:5c00:21cf::/48
• 2600:5c00:21d1::/48
• 2600:5c00:2304::/48
• 2600:5c00:2541::/48

Upstream networks

• AS7843 Charter Communications Inc
• AS20001 Charter Communications Inc

Adjacent networks

• AS7843 Charter Communications Inc
• AS20001 Charter Communications Inc