AS15319 — CSLNA-NJ-ASN

AS15319 announces 2 IPv4 prefixes covering 512 addresses and 0 IPv6 prefixes.

About this network

The netname and every reverse name write the address in hexadecimal.

What it's used for

• A container shipping line's North American network. Two IPv4 /24 prefixes announced from the United States, no IPv6, and two observed BGP neighbours.

Notable

• One netname is CVNET-0X3FF7BD00, which is the block's first address written as a hexadecimal number with a prefix marking it as such.
• The three answering addresses follow the same scheme: eight hexadecimal digits encoding the address, then a carrier's domain, so 63.247.189.64 answers as 3ff7bd40.cst.lightpath.net.
• The other netname is CSLNA-HOU-DR, the company's initials, a three letter city code, and two letters that read as disaster recovery.
• The registrant appears under two corporate names, one of them a predecessor.
• Six addresses were queried for reverse DNS and three returned a name.

Interesting

• Hexadecimal addressing in reverse DNS is compact, unambiguous and unreadable to almost everyone. It comes from provisioning systems that treat an address as the integer it is rather than as four numbers, and it makes log analysis require a conversion step.
• Labelling a block as disaster recovery in the registry says which site the business fails over to. That is one of the more useful things an attacker can learn from a registry, and it is written in plain text.

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

Announced prefixes

• 63.247.189.0/24
• 216.71.121.0/24

Upstream networks

• AS54004 Cablevision Lightpath LLC
• AS16504 Granite Telecommunications LLC

Adjacent networks

• AS54004 Cablevision Lightpath LLC
• AS16504 Granite Telecommunications LLC