ASN & routing
See the network behind any IP — its ASN, operator, a best-effort connection-type estimate, and reverse-DNS hostname. Runs in your browser, nothing stored.
What the routing fields mean
New to ASNs? Read the guideASN (autonomous system number)
An ASN identifies the autonomous system — a block of IP addresses run under one routing policy — that an IP belongs to. It's how networks announce routes to each other across the internet. Every IP that's reachable online sits inside some ASN.
AS organization
The AS organization is the entity that operates that autonomous system — an ISP, a hosting company, a university, a cloud provider. It's the clearest signal of who actually runs the network an IP lives on.
Connection type
This is a best-effort estimate, not a certainty. We infer "hosting / datacenter," "mobile," or "residential / ISP" from the operator's name — there's no perfectly reliable public signal for it, so treat it as a strong hint rather than a fact. A residential connection behind an unusual operator name can be misclassified.
ISP / operator
The ISP or operator is the network provider serving the IP. It often matches the AS organization, but not always — resellers and sub-allocations can differ.
Location
The location is an estimate derived from IP geolocation databases — usually accurate to the city or region, but sometimes off by a wide margin. It is never a precise position, and it's the same class of estimate the homepage IP lookup shows.
Reverse DNS (PTR)
A PTR record maps an IP back to a hostname — the reverse of a normal lookup. Hosting and mail servers usually have one (it often hints at the provider); many residential IPs don't, so "Not available" is completely normal and not an error.