AS15415 — OBIS

AS15415 announces 11 IPv4 prefixes covering 6,656 addresses and 2 IPv6 prefixes.

About this network

The reverse zone labels which addresses are network and broadcast, publishing the internal subnetting.

What it's used for

• A regional internet provider. Eleven IPv4 prefixes and two IPv6 prefixes announced from Germany, six thousand addresses, through two observed BGP neighbours.

Notable

• Every sampled address answered, which is rare, and they use at least seven different naming forms.
• Addresses ending in zero are prefixed with a word for network; addresses ending in two hundred and fifty-five are prefixed with an abbreviation for broadcast, in two spellings.
• Two of those network-labelled addresses end in one hundred and twenty-eight rather than zero, which means the space is subnetted in halves and the names say so.
• Other forms add words for temporary in two spellings, or drop the prefix entirely, or pad the octets with zeroes, and three different domains appear across one network.
• One block is registered to an individual and one carries a netname with a date from the early nineties.

Interesting

• Marking network and broadcast addresses is an old and careful habit that makes a traceroute readable. It also hands out the subnet boundaries, so anyone can map how the space is divided without probing.
• Seven conventions in one zone is a network that has been run continuously for a very long time by people who each added their own.
• Full reverse coverage is the mark of an operator that considers unnamed addresses a defect.

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

Announced prefixes

• 193.17.25.0/24
• 193.28.208.0/22
• 193.56.216.0/24
• 212.102.224.0/23
• 212.102.226.0/24
• 212.102.229.0/24
• 212.102.231.0/24
• 212.102.232.0/22
• 212.102.237.0/24
• 212.102.238.0/23
• 212.102.240.0/21
• 2001:67c:1b30::/48
• 2a00:aa40::/32

Upstream networks

• AS3320 Deutsche Telekom AG
• AS3209 Vodafone GmbH

Adjacent networks

• AS3320 Deutsche Telekom AG
• AS3209 Vodafone GmbH