THERE ARE THREE WAYS TO GET YOUR BSNL SIM PUK CODE:

FIRST: SMS

Send an SMS in this format: PUK <SPACE> <15 or 19-digit BSNL SIM Number> to 53733 or 123.

2ND: Helpline Number

Dial This Helpline Number: 1503

3RD: ONLINE

Visit This URL: https://portal2.bsnl.in/myportal/authorize.do and Generate Your PUK Code Online.