.pk and .com.pk are the most commonly used domains in Pakistan.
.edu.pk is used by educational institutions, while .gov.pk is used by government agencies.
Pick a gTLD whose meaning is most relevant to your website, since each carries a slightly different meaning.
A .com domain name is commonly used for commercial purposes, although they are increasingly becoming the default choice because they suggest a certain level of trust.
Domains with the .net extension were originally used by networking companies, such as internet service providers.
A .biz domain is mostly used for commercial businesses, while a .org domain is used for nonprofits, personal sites, open-source projects, some government websites, and is mostly used by non-profits.