All new domains that are registered under .PK, must belong to one of the following second-level or third-level domains. General guidelines for each categories are given below. Payment schedule for all the domain type are the same.
| .PK | General domains without additional suffixes |
| .COM.PK | General business or individual use |
| .NET.PK | Network-related businesses |
| .EDU.PK | Educational institutes |
| .ORG.PK | Non-profit organisations |
| .FAM.PK | Family and individuals |
| .BIZ.PK | General business and promotional |
| .WEB.PK | Websites |
| .GOV.PK | Government of Pakistan |
| .GOB.PK | Government of Balochistan |
| .GOK.PK | Government of Azad Kashmir |
| .GON.PK | Government of NWFP (Khyber Pakhtunkhwa) |
| .GOP.PK | Government of Punjab |
| .GOS.PK | Government of Sindh |
Maximum domain length is 63 characters (excluding the .pk portion). Second-level .PK domains require a minimum of four characters, while third-level domains like .COM.PK allow single-character names. Domain names cannot begin with dashes, contain consecutive dashes, or match reserved namespaces such as INFO.PK or PAKISTAN.PK.
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