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
origin Tier 1edge network prefix best path: chosen by 11 of 364 peers (3%) number on a line = peers using that link RIS data up to 07:30 UTC what the colours mean 12 of 270 paths drawn 7 quieter networks left out
Download PNG View JSON Raw upstream Full map of 1.1.1.0/24 →
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.
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.