AS14440 — CITONCOMPUTERCORP

AS14440 announces 2 IPv4 prefixes covering 512 addresses and 1 IPv6 prefixes.

About this network

Fifty-one IPv6 prefixes against two IPv4 blocks, nearly all of them carved out of one another.

What it's used for

• A managed IT and network services provider. 512 IPv4 addresses across two prefixes, and 51 IPv6 prefixes, with two observed BGP neighbours.

Notable

• The IPv6 announcements begin with 2602:ffbd::/41 and then subdivide it repeatedly, including 2602:ffbd:80::/44, 2602:ffbd:90::/47, 2602:ffbd:92::/47, 2602:ffbd:94::/46 and 2602:ffbd:98::/45.
• The covering block and its pieces are announced together, so the same addresses appear many times over.
• 64.61.197.0/24 carries the netname CITON-ENV-1, 216.251.161.0/24 carries CITON-NET-1.
• Six addresses were queried for reverse DNS and none returned a name.

Interesting

• This is one of the most subdivided IPv6 footprints in the range, and it is the opposite of what the address space was designed for. IPv6 was meant to let an operator announce one large block and route inside it privately. Announcing the pieces as well puts the internal structure into every routing table in the world, and every one of those entries costs memory on other people's routers.
• The pattern usually comes from assigning a block per customer and announcing each one as it is sold, rather than from any routing requirement. It works, and it does not scale politely.
• The two IPv4 netnames differ by one word, which suggests one block was set aside for a specific environment and the other for general use.
• A provider with this much IPv6 and nothing published across the reverse DNS sample has done the harder half of modernisation and skipped the easier half.

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

Announced prefixes

• 64.61.197.0/24
• 216.251.161.0/24
• 2602:ffbd::/36

Upstream networks

• AS40264 Charter Communications LLC
• AS12042 Fidium

Adjacent networks

• AS40264 Charter Communications LLC
• AS12042 Fidium