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DNS Lookup, Reverse DNS Lookup, Domain Configuration Check and IP Address Calculators

IP Calculators

The Subnet Calculator will take a network address and netmask, or a CIDR address and calculate the subnet range, number of hosts, first address, last address and the netmask. This calculator works with both IPv4 and IPv6 subnets.

Subnet Calculator

For IPv4 subnets enter address/netmask or use CIDR format
eg. 10.0.0.0/255.255.255.0 or 10.0.0.0/24
For IPv6 subnets use CIDR format eg. FE80::/64
What's My IP Address

This tool will show your IP address and any other information it
can about your IP address, it will also try and determine
if you are connecting using a proxy server.

These calculators convert an IPv4 dotted decimal IP address or an IPv6 IP address to an integer and convert an integer into an IPv4 or IPv6 IP address.

IP Address to integer

Enter dotted decimal IPv4 address eg. 10.0.0.0
or IPv6 address eg. 2620:0:2d0:200::10
IP Address from integer
Convert to IPv4 address
Convert to IPv6 address

Enter decimal IP address
eg. 167772160

The IP Address Country calculator determines which country an IP address comes from (ie. which country it has been assigned to). The CIDR to IP Address calculator takes a CIDR format address and converts it into an IP address range.

IP Address Country

Enter dotted decimal IPv4 address eg. 208.77.188.166
or IPv6 address eg. 2620:0:2d0:200::10
CIDR to IP Address Range

Enter CIDR format IPv4 or IPv6 address
eg. 10.0.0.0/24 or FE80::/64

These tools convert IPv6 addresses to their abbreviated (compressed) or expanded notation.

Compress IPv6 Address

Enter expanded (long) IPv6 address
eg. 2620:0000:02d0:0200:0000:0000:0000:0010
Expand IPv6 Address

Enter compressed (short) IPv6 address
eg. 2620:0:2d0:200::10

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