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 →
Network profile
Source: PeeringDB →Present at 3 internet exchanges: DE-CIX Frankfurt: DE-CIX Frankfurt Peering LAN, Free-IX Switzerland: Free IX, SwissIX: Peering
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 185.173.128.0/24 | 256 |
94.1%
|
Jeroen Massar | CH | — | — |
| 185.173.128.64/26 | 64 |
0.0%
|
Jeroen Massar | CH | — | — |
| 185.173.128.128/26 | 64 |
0.0%
|
Jeroen Massar | CH | — | — |
| 185.173.128.32/27 | 32 |
0.0%
|
Jeroen Massar | CH | — | — |
| 185.173.128.224/27 | 32 |
0.0%
|
Jeroen Massar | CH | — | — |
| 185.173.128.16/28 | 16 |
0.0%
|
Jeroen Massar | CH | — | — |
| 185.173.128.192/28 | 16 |
0.0%
|
Jeroen Massar | CH | — | — |
| 185.173.128.8/29 | 8 |
0.0%
|
Jeroen Massar | CH | — | — |
| 185.173.128.208/29 | 8 |
0.0%
|
Jeroen Massar | CH | — | — |
| 185.173.128.216/29 | 8 |
0.0%
|
Jeroen Massar | FR | — | — |
| 185.173.128.0/30 | 4 |
0.0%
|
Jeroen Massar | CH | — | — |
| 185.173.128.4/31 | 2 |
0.0%
|
Jeroen Massar | CH | — | — |
| 185.173.128.6 | 1 |
0.0%
|
Jeroen Massar | FR | — | — |
| 185.173.128.7 | 1 |
0.0%
|
Jeroen Massar | CH | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS57777 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 |
|---|---|---|
| 185.173.128.0/24 | 11,342 | 2026-07-23 16:13:01 |
Frequently Asked Questions
What is AS57777?
AS57777 is an Autonomous System Number assigned to Jeroen Massar. 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 AS57777 announce?
AS57777 announces 256 IPv4 addresses distributed across 1 routed CIDR prefixes. The network is registered in Switzerland.
Who operates AS57777?
AS57777 is operated by Jeroen Massar. The organization is based in Switzerland. You can view all IP ranges and related ASNs on the organization page.
What country is AS57777 registered in?
AS57777 is registered in Switzerland. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
