BGP & Routing
BGP Prefix Inspector
Analyze any IPv4 or IPv6 CIDR prefix — origin ASN, RPKI validity, peer visibility, and 30-day routing history from RIPE NCC.
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Analyze Prefix
About BGP Prefix Analysis
A BGP prefix (CIDR block) is the fundamental unit of routing information exchanged between Autonomous Systems on the internet. Each prefix has an origin AS that announces ownership and reachability of that address block.
Key Metrics Explained
- Origin ASN: The Autonomous System that first originates the prefix into BGP, typically the organization that owns the IP block.
- RPKI Status: Whether a Route Origin Authorization (ROA) certificate exists and validates the origin ASN and prefix length.
- Peer Count: Number of RIPE NCC Route Collectors (RRCs) that observe this prefix, indicating routing propagation breadth.
- Routing History: Timeline of origin changes over 30 days, useful for detecting route hijacks or legitimate transfers.
Why Prefix Analysis Matters
BGP prefix analysis is essential for network security teams investigating route hijacks, validating RPKI deployment, and understanding IP address ownership. Tools like this query RIPE NCC's Routing Information Service (RIS) to provide real-time global routing visibility.