Route explorer

The internet is ~75,000 networks (autonomous systems, each with an AS number) telling each other which addresses they can reach, using BGP. Every route lists the networks it passes through: the AS path. The last one owns the address.

A bigger network we pay to reach the whole internet. Reliable, but it costs money and adds a network in between, so it's our last choice.

Two networks connecting directly to swap traffic for free. Only covers their own addresses (and their customers), not the whole internet.

At an internet exchange hundreds of networks share one switch. Instead of a session with each, everyone talks to the exchange's route server, which passes routes on. Traffic still flows directly between the networks.

We have routers in Amsterdam and Enschede. Each passes the routes it learned to the other, so both know every path and traffic can leave wherever is best.

Networks that buy connectivity from us, like Greybull VPS customers announcing their own space. For them, we're the upstream.

Address space AS202585 holds itself. We announce it to the world, so routes to it end with us.

Local preference first: customers (400) beat peers (300) beat upstreams (10), because they're cheaper and more direct. Equal preference? The shorter AS path wins. Still equal? Tie-breakers, like the oldest route.