Toolbox
Network Tools
Diagnose and understand a connection without exposing your data.
IP
Locate an IP approximately
The location of an IP is an estimate of a network area, not a physical address.
Open →IP
View RDAP information for an IP
RDAP is the modern and structured protocol that allows you to consult the allocation of an IP block.
Open →IP
Perform a reverse DNS
A PTR query looks for the hostname that is possibly associated with an IP address.
Open →IP
CIDR Calculator
CIDR notation describes a network by an address and a prefix length, for example 192.0.2.0/24.
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Calculate a subnet mask
A mask distinguishes the network part from the host part of an IPv4 address.
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Convert an IP address
Convert IPv4 bytes between decimal, binary, and hexadecimal notation.
Open →IP
Understanding HTTP headers
Headers convey the technical context of a request and its response.
Open →IP
Understand your user agent
The user agent usually describes the browser and the system, with deliberately limited precision.
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