Ryan, fired Monday by the Jets, is slated to meet next week with the teams.
The Falcons are looking to replace Mike Smith, who also was fired Monday. Owner Arthur Blank is familiar with Ryan because he interviewed him in 2008, the year he hired Smith. The 49ers need a replacement for Jim Harbaugh, who left to become the Michigan coach.
The New York Daily News and New York Post first reported Ryan's interviews.
Ryan spent part of Tuesday meeting with ESPN officials. It wasn't an interview, per se, just a get-acquainted session. He's drawing interest from TV networks, although his preference is to remain on the sideline as a head coach. The Daily News first reported the meeting.