Postal code (known in various countries as a post code, postcode, or ZIP code) is a series of letters /or digits appended to a postal address for the purpose of sorting mail.
A postal code (known in various countries as a post code, postcode, or ZIP code) is a series of letters and/or digits appended to a postal address for the purpose of sorting mail. Although postal codes are usually assigned to geographical areas, special codes are sometimes assigned to individual addresses or to institutions that receive large volumes of mail, such as government agencies and large commercial companies.
Click on this link state of Bangladesh to view Post Codes