Network Tools
DNS records, reverse DNS, subnet calculator, CIDR ranges and IP address conversions for admins and developers.
DNS LookupA, AAAA, CNAME, MX, NS, TXT, SOA and CAA records of a domain.
Reverse DNS LookupFind the host name (PTR record) of an IP address.
Subnet CalculatorNetwork, broadcast, mask, host range and size of any IPv4 or IPv6 subnet.
IP Range to CIDRConvert a start–end IP range to the smallest list of CIDR blocks, and back.
IP Address ConverterIP address to decimal, hex, binary, octal and IPv4-mapped IPv6.
IPv6 Expand & CompressExpand an IPv6 address to all 32 digits, or compress it (RFC 5952).