There is no single postal code for all of Karachi, as it is a large metropolitan city with many different postal codes assigned to its various neighborhoods and localities. For example, Saddar uses 74400, Gulshan-e-Iqbal 75300, Clifton 75600, and North Nazimabad 74700. To find the correct code, you must always check the postal code specific to your area.
You can find the Karachi Postal code of your Location.
It is also important to mention that postal codes in Pakistan were introduced in 1988 to represent the delivery post office of the shipping address. These codes are also referred to as postcodes and ZIP codes, and they ensure accurate mail sorting, faster delivery, and proper identification of regions within the postal system.
So, whenever you need a postal code in Karachi, you must look up the exact code for your area rather than using one code for the whole city.