AS204028 — DolphinIT Dolphin IT-Systeme e.K.

AS204028 announces 2 IPv4 prefixes covering 1,280 addresses and 1 IPv6 prefixes.

About this network

DOLPHINIT is operated by Dolphin IT-Systeme e.K.

What it's used for

• The address space carries client infrastructure, with reverse DNS entries consistently pointing to clients.srvfarm.net across both announced IPv4 blocks.
• The AS announces 1280 IPv4 addresses and 28 IPv6 prefixes, maintaining 9 observed neighbours; this ratio indicates a hosting or service provider role rather than a large-scale access network.
• Traffic from this AS consists of enterprise IT, cloud, and telecommunications services, including servers, virtualization, and digital communication solutions provided to business clients.

Notable

• Registrants for both the 185.118.196.0/22 and 213.170.142.0/24 prefixes are listed as Dolphin IT-Systeme e.K., matching the AS holder.
• The inventory includes a mix of smaller IPv4 blocks and a large, contiguous range of IPv6 prefixes, reflecting a modernized infrastructure setup.

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

Announced prefixes

• 185.118.196.0/22
• 213.170.142.0/24
• 2a06:9500::/29

Upstream networks

• AS3320 Deutsche Telekom AG
• AS3209 Vodafone GmbH

Downstream networks

• AS203045 Kettler Textil-Konfektion GmbH
• AS202878 Kevin Olbrich
• AS202731 FAUSER AG
• AS203696 Europaeische Akademie fuer biopsychosoziale Gesundheit, Naturtherapien und Kreativitaetsfoerderung (EAG)
• AS203881 GFA Steriltechnik GmbH & Co. KG
• AS203838 WPK Kunststofftechnik GmbH & Co. KG
• AS203692 ppdigital GmbH & Co. KG

Adjacent networks

• AS3209 Vodafone GmbH
• AS3320 Deutsche Telekom AG
• AS203696 Europaeische Akademie fuer biopsychosoziale Gesundheit, Naturtherapien und Kreativitaetsfoerderung (EAG)
• AS202731 FAUSER AG
• AS203881 GFA Steriltechnik GmbH & Co. KG
• AS203838 WPK Kunststofftechnik GmbH & Co. KG
• AS202878 Kevin Olbrich
• AS203045 Kettler Textil-Konfektion GmbH
• AS203692 ppdigital GmbH & Co. KG

Routing security

• RPKI: 13 valid, 0 invalid and 0 not-found announcements; 7 ROAs.
• ASPA: none published.
• IRR: 54% of announcements registered; 7 route objects.
• Listed in as-sets: AS-4IXP, AS-4IXP-RS, AS-4IXPV6, AS-DOLPHINIT, AS-DOLPHINIT:AS-CUSTOMERS, AS-NETASSIST, AS-SBIX-RS, AS-UKRAINE, AS-UNITYMEDIA-B2B, AS-UPIXP:AS-CUSTOMERS.

Internet exchanges

• KleyReX Internet Exchange — Frankfurt, Germany
• United Peering — Wuppertal, Germany