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 v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
Network profile
Source: PeeringDB →Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 185.153.104.0/22 | 1.0K |
0.2%
|
T-Systems Schweiz AG | CH | — | — |
| 138.124.232.0/23 | 512 |
0.0%
|
T-Systems Schweiz AG | CH | — | — |
| 193.108.232.0/23 | 512 |
4.3%
|
T-Systems Schweiz AG | CH | Zurich | Fehraltorf |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS21405 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 |
|---|---|---|
| 193.108.232.0/23 | 7,201 | 2026-07-29 13:10:50 |
| 185.153.104.0/22 | 7,059 | 2026-07-29 11:34:46 |
| 138.124.232.0/23 | 5,649 | 2026-07-29 11:34:46 |
Frequently Asked Questions
What is AS21405?
AS21405 is an Autonomous System Number assigned to T-Systems Schweiz AG. 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 AS21405 announce?
AS21405 announces 2.0K IPv4 addresses distributed across 3 routed CIDR prefixes. The network is registered in Switzerland.
Who operates AS21405?
AS21405 is operated by T-Systems Schweiz AG. The organization is based in Switzerland. You can view all IP ranges and related ASNs on the organization page.
What country is AS21405 registered in?
AS21405 is registered in Switzerland. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
