sameid.net
SameID is a web tool for finding, checking, or analyzing online information related to domains, networks, and digital services.
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osint.sh
OSINT.sh tool for finding domains and websites hosted on the same IP address.
osint.sh
OSINT.sh tool for finding domains that share the same mail exchanger records.
varnish-software.com
Hitch is a developer community or publication for programming discussions, news, tutorials, and help.
github.com
Open source tool that searches newly registered domain feeds to find typosquatting, IDN homograph, doppelganger and bitsquatting domains impersonating