Postal code of the Jaffna district is given as 40000 by the Sri Lanka postal department.
Many villages and towns located in this district don't have their own postal code. So if you are sending any mails or parcels to any of these places in the Jaffna district can write the code as the Jaffna Postal office staff will dispatch it to the relevant post office in quick time.
Take note that the phone code for this area is different from the postal code.
Jaffna phone code is 021 within Sri Lanka.
This does not apply for the mobile phones that are located in Jaffna.
If you are calling from overseas then add 009421 followed by the Jaffna phone number.
Public holidays, Sundays and Poya days are the best time to make low priced calls to any part of the world from Sri Lanka through out the day and night.
International country code of Sri Lanka is +94 or 0094.