An exemplary method includes providing a typographically erroneous domain name, tracing the domain name where tracing includes entering the domain name as part of a URL and recording one or more subsequent URLs, identifying a domain parking service for the domain name based at least in part on information in one of the recorded URLs, determining client identification information in at least one of the recorded URLs where the client identification information identifies a customer of the domain parking service and blocking one or more domain names based at least in part on the client identification information. Other exemplary technologies are also disclosed.