See the link below for a list of postal codes in Vietnam.
Yes, it does.
what is the postal code of Blk 29 Hillview Avenue of Singapore
92999
Its 760760
084 <-- for sure this is not the postal code. +84 is the country code (for phone calls). Vietnam, like most countries, has postal codes which are different for different locations within the country. Just the city of Hanoi has many postal codes. Ho Chi Minh City also has many different postal codes. One country does not normally have one postal code. Unlike many countries, postal codes are not commonly used in Vietnam. They do exist but not many people use them. I used to send packages all the time to Vietnam without a postal code but now that I know the postal code, I use it. However, there is no answer to your question. It is like asking 'What is the postal code of the UK?' Of course, the UK has many different postal codes. The same is true of Vietnam.
What is the postal code for Hai phong City
Postal code is Singapore 510230
quang ninh
Lam dong provence
Postal codes in Singapore have consisted of six digits since 1995, replacing the four-digit system introduced in 1979.
United States Postal Office is the cheapest.