BGP Map
Enter a prefix, an IP address or an AS number to see the AS paths networks around the world use to reach it.
Try 1.1.1.0/24, 8.8.8.8, AS13335 or 2606:4700:4700::/48
Reading the map
- Each box is an autonomous system, and the arrows point the way traffic travels.
- Paths start at the top, with the networks that share their routes with a RIPE RIS collector.
- The green box is the origin, the network announcing the prefix. The prefix itself sits under it.
- Colours show the kind of network: violet for Tier 1, blue for Tier 2, cyan for other transit networks and white for edge networks.
- The number on a line is how many collector peers use that link. The red path is the one most of them use.
Guides
- How to read a BGP mapWhat the boxes, arrows, numbers and colours on a map mean.
- How to find the upstream providers of a networkReading transit providers from AS paths, and what the shares mean.
- Which network announces an IP address?From an address to its prefix and origin AS, and when whois disagrees.
- What is an AS path?How the AS path is written and used, and what prepending does.
- Tier 1 networksThe transit-free networks, with a link to each one's map.
- Origin, upstream and peer: who is who on a BGP mapThe roles networks play on a path, and why peers hide.
- BGP map, looking glass or traceroute: which one to useWhich tool answers which routing question.
- How to spot a BGP hijack on a mapThe signs of a hijack in route data, and the harmless look-alikes.
- Is my prefix visible on the Internet?Reading visibility from a map and the common reasons a prefix is missing.
- BGP visualizers and map tools comparedPath maps, replays, AS explorers and looking glasses, and when to use each.
Questions
What is a BGP map?
A drawing of the routes that networks use to reach one IP prefix, with a box for each autonomous system and an arrow for each hop between two of them. The routes are the ones RIPE RIS collectors received over BGP in the last 24 hours.
What is an AS path?
The list of autonomous systems a BGP route has passed through, with the network that announced the prefix at the end. When a router has several routes to the same prefix and its own policy does not settle it, the one with the shorter AS path usually wins.
Is this the same as a route-map on a router?
No. A route-map is router configuration, in Cisco IOS for example, that filters or changes routes. BGP Map only reads the routes other networks already use and changes nothing.
Where the routes come from, how fresh a map is and what the colours mean are on the About page.