AS15540 — GEDAS-DE-AS

AS15540 announces 4 IPv4 prefixes covering 11,776 addresses and 1 IPv6 prefixes.

About this network

The company's registered name begins with a lower case letter, and everything else still names the old one.

What it's used for

• An information technology services company. Five IPv4 prefixes and one IPv6 /32 announced from Germany, eleven thousand addresses, across three observed BGP neighbours.

Notable

• The holder's name is written in lower case before its two corporate forms, which is how the company registered it rather than a transcription error.
• The AS handle and all five netnames carry a completely different, older brand.
• Four of the blocks form a rising run from a /21 through a /22 to two /24 prefixes, and that run stops two /24 blocks short of meeting the /19 above it.
• Every block shares one netname and one pair of registrants, with no variation.
• Fifteen addresses were queried for reverse DNS and none returned a name.

Interesting

• The gap between the run and the /19 is the interesting part. Two /24 blocks sit between them that this network does not announce, and closing that gap would let four routes collapse into one.
• A retired brand surviving in the AS handle and in every netname, while the holder field carries the current name, is the usual pattern: the name people see gets updated and the identifiers do not.
• Eleven thousand addresses with nothing published in reverse says this network is a place work happens from rather than a service anyone connects to.

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

Announced prefixes

• 139.1.112.0/21
• 139.1.120.0/22
• 139.1.124.0/23
• 139.1.128.0/19
• 2a01:74c0::/32

Upstream networks

• AS3320 Deutsche Telekom AG
• AS8881 1&1 Versatel GmbH
• AS21413 Envia Tel GmbH

Adjacent networks

• AS3320 Deutsche Telekom AG
• AS8881 1&1 Versatel GmbH
• AS21413 Envia Tel GmbH