1. A homoglyph monitoring system comprising: a memory to store machine readable instructions; and at least one processor to execute the machine readable instructions in the memory to: receive a target domain name, create potential attack vector strings based on the target domain name, including: identify a homoglyph in an index of homoglyphs that is similar to a character in the target domain name, determine whether a similarity between the homoglyph and the character of the target domain name is greater than a minimum similarity threshold, and in response to a determination that the similarity is greater than the minimum similarity threshold, replace the character in the target domain name with the homoglyph to create one of the potential attack vector strings; and facilitate searching domain name system (DNS) servers in a target geographic region based on the potential attack vector strings and determine from results of the searching whether a DNS record in the results includes one of the potential attack vector strings.