What is the Postal Code (Zip) for Old Station Avenue in Mount Lavina, Colombo, Sri Lanka?

Question

It's either Colombo1 or 2 or 3..... so on?

Answer 1

10370 is the only number you need. (Their system is not zero error)
The mail service that has that route is bicycle delivery and slow, but efferent.
My friend was doing university research in that area and only used the one code.
You did not distinguish between the north-south and the east-west route, so this is the only answer I can provide, because the code changes just over the waste-water canal to the north and the police/ fire department to the east.

Answer 2

300457