edu.pk is second level ccTld desigenated for educational institutions in Pakistan by PKNIC SRS (Shared Registery for .pk domains). To register a .edu.pk domain, presance of valid School / College / University or educational institution is a requirement. Only registered private schools / colleges / universities and government educational institutions can register .edu.pk domain names. Copy of CNIC along with copy of registration certificate and signed stamed domain registration request on latter head is a requirement for edu domains.
Top Level Domain name is called Tld, there are many Tld can be used to register domains. Other than generic Tlds there are country level domain names called ccTlds,, .pk is a ccTld for Pakistan. PKNIC is SRS (Shared Registry System) for all .pk domains, its working since 1992 and is managing all Pakistani domain names since then. Domains can be registered directly with pknic or by authorized pk domain re-sellers, like most of the other Tlds and ccTlds .pk domains are also open to anyone for registration, however registration fees are different for local Pakistani customers and non Pakistani or International customers. Minimum registration or renewal period for .com.pk, .net.pk, org.pk, .edu.pk and gov.pk domains is 2 years.