AS15894 — LEITWERK-AS

Network type: hosting

AS15894 announces 3 IPv4 prefixes covering 4,864 addresses and 11 IPv6 prefixes.

About this network

Ninety-seven neighbours on under five thousand addresses, and seventeen IPv6 prefixes nested inside one another.

What it's used for

• A network services company. Three IPv4 prefixes and seventeen IPv6 prefixes announced from Germany, four thousand eight hundred and sixty-four addresses, across ninety-seven observed BGP neighbours.

Notable

• The IPv6 holdings are a chain of subdivisions of one range: a /33, then a /35, /40, /42, /46, /47, /48, /45 and /44, each sitting inside the one before rather than beside it.
• The list is not in size order, so the pieces were carved out as they were needed and announced separately afterwards.
• A separate /48 comes from a different range entirely, the block reserved for members of the registry.
• One of the three IPv4 blocks belongs to another company, under a netname built from a different brand and a date.
• Both answering addresses use a fourth domain again, with names abbreviating a city, address translation and a broadcast function.

Interesting

• Ninety-seven neighbours against four thousand addresses is the ratio of an exchange participant, not a customer. This network peers with everyone it can reach and announces almost nothing.
• Announcing a range and also announcing pieces of it is how traffic gets steered: the specific route wins, so each carved-out piece can take a different path while the whole still has a fallback.

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

Announced prefixes

• 185.39.14.0/23
• 194.41.0.0/24
• 217.28.96.0/20
• 2001:67c:39c::/48
• 2a02:ba8::/32
• 2a02:ba8:a148::/45
• 2a02:ba8:a150::/44
• 2a02:ba8:a160::/43
• 2a02:ba8:a180::/41
• 2a02:ba8:a200::/39
• 2a02:ba8:a400::/38
• 2a02:ba8:a800::/37
• 2a02:ba8:b000::/36
• 2a02:ba8:c000::/34

Upstream networks

• AS33891 Core-Backbone GmbH
• AS6939 Hurricane Electric LLC
• AS200924 Stiegeler Internet Service GmbH
• AS3320 Deutsche Telekom AG
• AS34549 meerfarbig GmbH & Co. KG
• AS48362 Stadtwerke Feldkirch
• AS212024 Marc Schmitt
• AS34019 Hivane Association
• AS24482 SG.GS
• AS37100 SEACOM Limited
• AS57463 NetIX Communications JSC
• AS12779 IT.Gate S.p.A.
• AS20485 Joint Stock Company TransTeleCom
• AS17639 Converge ICT Solutions Inc.
• AS213241 TECHIT.BE SRL
• AS29632 Netassist International EOOD

Downstream networks

• AS208235 Link2Air GmbH
• AS215137 Unikraft GmbH

Adjacent networks

• AS33891 Core-Backbone GmbH
• AS208235 Link2Air GmbH
• AS200924 Stiegeler Internet Service GmbH
• AS6939 Hurricane Electric LLC
• AS215137 Unikraft GmbH
• AS3320 Deutsche Telekom AG
• AS34549 meerfarbig GmbH & Co. KG
• AS48362 Stadtwerke Feldkirch
• AS34019 Hivane Association
• AS24482 SG.GS
• AS212024 Marc Schmitt
• AS12779 IT.Gate S.p.A.
• AS37100 SEACOM Limited
• AS20485 Joint Stock Company TransTeleCom
• AS57463 NetIX Communications JSC
• AS17639 Converge ICT Solutions Inc.
• AS29632 Netassist International EOOD
• AS213241 TECHIT.BE SRL

Internet exchanges

• DE-CIX Frankfurt — Frankfurt, Germany