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Autonomous System

AS204028

Dolphin IT-Systeme e.K.

Announced IPs
1,280
CIDR prefixes
2
ASN
AS204028

Reputation · trust score

A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.

65/100
Moderate
How this score is built

Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →

Network profile

Source: PeeringDB →
Geographic scope Not Disclosed
Traffic ratio Not Disclosed

Present at 1 internet exchange: United Peering - UP-IXP

Top CIDR ranges

CIDRIPsPTR DensityOrganizationCountryStateCity
185.118.196.0/22 1.0K
99.9%
Dolphin IT-Systeme e.K. DE
213.170.142.0/24 256
100.0%
Dolphin IT-Systeme e.K. DE North Rhine-Westphalia Hückeswagen

BGP Announced Prefixes

Live BGP anomalies →

Prefixes AS204028 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.

PrefixAnnouncement samplesLast seen
185.118.198.0/24 7,642 2026-08-04 01:05:58
185.118.196.0/24 7,635 2026-08-04 01:05:58
185.118.196.0/22 7,615 2026-08-04 01:05:58
185.118.199.0/24 7,605 2026-08-04 01:05:58
185.118.197.0/24 7,578 2026-08-04 01:05:58
213.170.142.0/24 7,457 2026-08-04 01:05:58

Frequently Asked Questions

What is AS204028?

AS204028 is an Autonomous System Number assigned to Dolphin IT-Systeme e.K.. An ASN identifies a network that controls a specific set of IP addresses and determines how traffic is routed across the internet via BGP (Border Gateway Protocol).

How many IP addresses does AS204028 announce?

AS204028 announces 1.3K IPv4 addresses distributed across 2 routed CIDR prefixes. The network is registered in Germany.

Who operates AS204028?

AS204028 is operated by Dolphin IT-Systeme e.K.. The organization is based in Germany. You can view all IP ranges and related ASNs on the organization page.

What country is AS204028 registered in?

AS204028 is registered in Germany. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.

Last updated: 2026-08-04 01:10:36 UTC
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