How to get a 6 digit number?

To get a six-digit number, depending on the purpose, you have a couple of options. If you are looking for a six-digit short code for mass messaging, you first decide whether you need a random or dedicated vanity code. Then, you submit an application to the carriers for approval, activate and test the number, and then begin sending messages.
Alternatively, if you are setting up a UPI account, you generate a secure 4 or 6-digit UPI PIN during registration. This confidential Personal Identification Number is required to authorize transactions. Paytm offers a platform to create a UPI account and generate this PIN securely.