Shave all been hassled at some point to write the correct pin code for product delivery or send a parcel, given that different areas, tehsils (taluks), and districts can have different postal codes though they might be in the same state.
This app “WORK WITHOUT INTERNET”
You can find India code in this app
1. Pin code(Postal code) :
b. Search Post office by pin code

2. IFSC:
a. Search by branch name
b. Search by district name
c. Search by MICR code
d. Search bank by IFSC

3. Vehicle Code(RTO):
a. Search by state
b. Search by letter hint which auto populate vehicle code

4. STD code:
a. Search by place name