From Wiki we can understand that PMNRF operates out of PMO, New delhi. So here are some consolidated information.
Donee PAN - AACTP4637Q
Prime Minister's National Relief Fund,
Prime Minister's Office,
New Delhi - 110011
All donations to PMNRF are 100% tax exempted through 80G
Disclaimer: I'm not responsible for the authenticity of the above information, readers are advised to verify through other sources, if required, before making any decisions.