Tranmere will be bringing at least 750 fans with them on Wednesday, with confirmation that they are now booking their 15th coach for free travel.
Manager Ronnie Moore told their official site: "I'm delighted with the response so far and hope other supporters will join those who have already got their tickets and come and back us at Hereford. We're in for a tough game but we're looking forward to it. Hopefully we will give our supporters something to sing about."
Striker Chris Greenacre added: "The fans played a huge part in our first and second round wins at Chesterfield and Bradford and it's great that we're going to have another big following at Hereford. Hopefully our supporters can make the difference once again."
Tranmere are taking bookings for the coaches until 2pm tomorrow.