.zm
.zm is the Internet country code top-level domain (ccTLD) for Zambia. Registrants of .zm domains must "have a presence in Zambia".
Second-level domains
Registrants are required to register domains at the third level under an existing second-level domain (SLD). There are eight second-level domains:
ac.zm: Academic institutions
co.zm: Commercial entities
com.zm: Commercial entities
edu.zm: Academic institutions
gov.zm: Government
net.zm: Networks
org.zm: Non-commercial organizations
sch.zm: Schools
The designations above are assumed based on observed practices and standard conventions, as ZAMNET (the ccTLD registry) do not maintain online documentation codifying this. Most entities will generally register either a .co.zm or .org.zm domain, if they choose to use the ccTLD rather than a generic top-level domain.
The one documented exception to the requirement to register at the third level is that "registered ISPs" may register at the second level—e.g., zamnet.zm. However, there are several undocumented variances to this rule—e.g., the Bank of Zambia's domain is boz.zm. The Regulator Zambia Information and Communication Technology Authority ZICTA is zicta.zm