IP and network tools
Find out where an address is, who runs it and which network it belongs to, who made a network card, and how to slice a block of addresses. None of it needs an account or key.
IP and network tools
IP WHOIS
Who owns an IP address, and how to reach their abuse desk.
IP lookup
Where an IP address is, who runs its network and how far to trust the answer.
ASN lookup
The network behind an AS number.
What is my IP
The address the internet sees for you right now.
Subnet calculator
Network, broadcast, usable range and splits for any CIDR.
IP converter
Decimal, hex, binary and integer forms of an address.
CIDR range converter
Turn a range into CIDR blocks and back.
IPv6 compress & expand
Shorten or spell out an IPv6 address.
MAC address lookup
Who made a network card, and whether the address is private.