Postal code: Vietnam uses six-digit postal codes, where the first two digits determine a province or city. The codes shown in the table above were valid as of 2002. If no postal codes were changed during subsequent province mergers and splits, some of the codes in Hanoi municipality would...
The four-digit number on the far left represents the frame number at which a particular Subject-Numeric Classification begins. This is followed the Subject- Numeric symbol, a country code, and an explanation of the Subject-Numeric Classification. The samples below provide a description of the ...