If you’re trying to protect your brand, this is a great tool from DomainTools:
There are a number of typo generators out there, but DomainTools’ is the only one that makes it easy to find out who is typosquatting on your domain name. It also lets you know if someone previously typosquatted or tasted a typo of your domain.
To use the typo generator, go to domaintools.com/domain-typo and enter the domain name. Then choose your options including views:
Registrant View – see typos of your domain and the registrant’s name. Great for seeing if one person is aggressively typosquatting you.
DNS View – typos include nameservers and IP addresses. Great for seeing if typos of your domain are parked.