Enter a public IPv4 address to see who it's registered to — network range, ASN, ISP, and rough geolocation. Leave it blank to look up your own address.
Lookups query a public IP-WHOIS API directly from your browser — the request goes straight from your device to the data provider; nothing passes through or is logged by this site.
Registration data (ASN, network owner) comes from the regional internet registries (ARIN, RIPE, APNIC, and so on); city-level geolocation is an estimate based on the network's registered location and can be off, particularly for mobile and satellite connections.