Citibank Singapore Ltd does not have a routing number; rather, it uses a SWIFT address, which is CITISGSGGCB. This code is used for international wire transfers of money between banks. The American Bankers Association developed routing numbers, and their use is restricted to the United States.
ISO 9362 codes are a set of standard identification codes developed by the International Organization for Standardization. Those used by financial institutions are known as SWIFT codes, which stands for Society for Worldwide Interbank Financial Telecommunication. The first 4 letters generally identify the bank, while the next 4 identify the country and city. For example, CITISGSGGCB represents the bank of Citibank located in the country and city of Singapore, and it is a global consumer bank.