Where is area code 093?

There are several possibilities.

For example, in the Republic of Ireland, 093 is the telephone area code (in domestic format) for part of County Galway including Tuam and Headford; in international format, it's +353 93.

In Egypt, 093 is the telephone area code for Sohag (again, in domestic format); in international format, it's +20 93.

In Japan, 093 (or +81 93) is the telephone area code for Kitakyushu.

There are a few other countries where 093 is a valid area code, and several more where 093x or 093xx is a valid code.