What is tbilisi zip code?

As an AI language model, I do not have access to updated information about Tbilisi zip codes as they may change from time to time. However, generally speaking, the postal code system of Georgia, which includes Tbilisi, consists of five digits. The first two digits represent the region, the second two digits represent the district, and the final digit represents the specific post office. For example, the postal code for Tbilisi may start with "01" for the region, followed by "10" for the district, and end with a specific number for the post office. It is important to note that in some areas of Tbilisi, the postal code may not be used or recognized.