SBINbank0always zero000300branch
An IFSC has 11 characters: 4 letters for the bank, a zero, then 6 letters or numbers for the branch. You can find it on a cheque or in your bank's app.
Branch details come from
Razorpay's IFSC API, built from Reserve Bank of India data. Only the code you look up is sent. Always confirm details with your bank before sending money.