Swift Code is a standard format of Bank Identifier Codes (BIC) and it is unique identification code for a particular bank. These codes are used when transferring money between banks, particularly for international wire transfers. Banks also used the codes for exchanging other messages between them.

Character Representation

First 4 characters - bank code (only letters)
Next 2 characters - ISO 3166-1 alpha-2 country code (only letters)
Next 2 characters - location code (letters and digits) (passive participant will have "1" in the second character)
Last 3 characters - branch code, optional ('XXX' for primary office) (letters and digits)

The Swift Code of the Hyderabad Main branch of the HDFC Bank is given below

SWIFT Code / BIC HDFCINBBHYD
Bank / Institution HDFC BANK LIMITED
Branch Name (HYDERABAD BRANCH)
Address SURYODAYA , OPP SHOPPERS STOP, BEGUMPET, 1-10-60/3, FLOOR 3
City HYDERABAD
Postcode 500 016
Country India

For knowing the Details of the Any other branches of the HDFC Bank you may get from the branch Locator section of the HDFC Bank

For your convince Here I am giving you the Snapshot of the branch Locator Section of the bank

HDFC Bank branch Locator