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 4 internet exchanges: Frys-IX, BGP.Exchange - Amsterdam, BGP.Exchange - Frankfurt, WHY2025 IXP
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 91.217.208.0/24 | 256 |
0.0%
|
Arend Brouwer | PL | — | — |
| 185.219.6.0/24 | 256 |
0.0%
|
Arend Brouwer | NL | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS51517 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 |
|---|---|---|
| 91.217.208.0/24 | 66,921 | 2026-07-23 16:50:56 |
| 103.251.156.0/24 | 13,477 | 2026-07-23 16:43:40 |
| 185.219.6.0/24 | 9,517 | 2026-07-16 08:47:23 |
| 103.251.156.0/22 | 2,753 | 2026-07-13 11:05:27 |
Frequently Asked Questions
What is AS51517?
AS51517 is an Autonomous System Number assigned to Arend Brouwer. 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 AS51517 announce?
AS51517 announces 512 IPv4 addresses distributed across 2 routed CIDR prefixes. The network is registered in Poland.
Who operates AS51517?
AS51517 is operated by Arend Brouwer. The organization is based in Poland. You can view all IP ranges and related ASNs on the organization page.
What country is AS51517 registered in?
AS51517 is registered in Poland. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
