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Check whether an address is valid, and what kind of address it is.
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ASN Lookup
Holder, registry and every prefix an AS announces.
IP Range to CIDR
Convert an address range into the smallest set of CIDR blocks.
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Network, broadcast, masks and host counts for any prefix.
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Split networks into subnets, IPv4 and IPv6.
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Binary, hex, integer, expanded and reverse forms of an address.
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IPv4-mapped, 6to4 and NAT64 representations.
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WHOIS & RDAP Lookup
AS42708
WHOIS / RDAP
AS42708
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