Vaishnavastra

The Vaishnavastra was only known to 

1. Lord Krishna, 
2. Narakasura, 
3. Bhagadatta, 
4. Pradyumna and 
5. Parashurama during the Mahabharata age. 

In the Ramayana age the Vaishnavastra was known only to 

1. Lord Rama and 
2. Indrajit.