BGP Route Lookup
Analyze Border Gateway Protocol routing information for any IP address or ASN
Route Summary
BGP Path Visualization
ASN Information
Route Table
| Prefix | ASN Path | Next Hop | Origin | Last Updated |
|---|---|---|---|---|
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No route data yet |
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Global Route Map
Learn more & FAQ
What is a BGP route lookup?
The internet is really a collection of separately-owned networks that announce routes to each other using BGP (Border Gateway Protocol). This tool queries that routing information for an IP address or domain and shows you the announcing ASN, the prefix it was announced under, and the AS path traffic would take to reach it - the same information network operators use to debug outages and routing anomalies.
How to read your results
The originating ASN and its name tell you who operates the network your IP belongs to. The prefix shows the full block being announced, and the AS path lists the networks traffic would hop through to get there. If you were expecting a specific provider and see a different ASN, or the path looks unusually long, that's worth investigating - it can point to a provider change, a misconfiguration, or in rare cases a routing hijack.
Frequently asked questions
What is BGP and why does it matter for troubleshooting?
BGP (Border Gateway Protocol) is how networks announce which IP address ranges they're responsible for across the internet. If a BGP route is missing, withdrawn, or hijacked, traffic to that range can slow down, loop, or fail to reach its destination at all - this tool shows you the route as it's actually being announced right now.
What's the difference between an ASN and a prefix?
An ASN (Autonomous System Number) identifies a network operator - an ISP, a hosting company, a large organization. A prefix is the block of IP addresses (like 192.0.2.0/24) that ASN announces it owns and will route traffic for.
Why would my BGP route change unexpectedly?
Routes change when a network provider updates its peering, when a prefix is re-announced through a different upstream, or - more rarely and more seriously - when another network wrongly or maliciously announces your prefix (a BGP hijack). Comparing the current route against what you expect is the fastest way to catch either.
Can I look up a domain name instead of an IP?
Yes - enter a domain and the tool resolves it to an IP address first, then looks up the BGP route for that address.
Why does traffic to my server sometimes take a longer path?
BGP picks routes based on policy, not shortest physical distance - a route with more hops but a cheaper or preferred peering agreement for one of the networks involved can still win. That's why two IPs in the same city can have very different-looking paths.