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.
- Baseline (neutral) 65
- Trust score 65 / 100
Experimental · trust-vectors model v1.1.0 — a transparent heuristic, not a definitive verdict. How it works →
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 83.137.32.0/21 | 2.0K |
1.4%
|
Arvato Systems GmbH | DE | — | — |
| 185.91.104.0/22 | 1.0K |
1.0%
|
Arvato Systems GmbH | DE | — | — |
| 193.28.78.0/23 | 512 |
1.0%
|
Arvato Systems GmbH | DE | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS51401 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.
| Prefix | Announcement samples | Last seen |
|---|---|---|
| 83.137.32.0/22 | 10,053 | 2026-07-20 06:10:29 |
| 83.137.36.0/22 | 10,050 | 2026-07-20 06:10:29 |
| 193.28.79.0/24 | 9,987 | 2026-07-20 06:10:29 |
| 193.28.78.0/24 | 9,981 | 2026-07-20 06:10:29 |
| 83.137.32.0/21 | 9,940 | 2026-07-20 05:36:11 |
| 193.28.78.0/23 | 9,876 | 2026-07-20 05:36:11 |
| 185.91.104.0/23 | 9,834 | 2026-07-20 06:10:29 |
| 185.91.106.0/23 | 9,831 | 2026-07-20 06:10:29 |
| 185.91.104.0/22 | 9,697 | 2026-07-20 05:36:11 |
Frequently Asked Questions
What is AS51401?
AS51401 is an Autonomous System Number assigned to Arvato Systems GmbH. 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 AS51401 announce?
AS51401 announces 3.6K IPv4 addresses distributed across 3 routed CIDR prefixes. The network is registered in Germany.
Who operates AS51401?
AS51401 is operated by Arvato Systems GmbH. The organization is based in Germany. You can view all IP ranges and related ASNs on the organization page.
What country is AS51401 registered in?
AS51401 is registered in Germany. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
