The 49ers feel certain they have landed their head coach, according to sources.

And the Atlanta Falcons are reportedly convinced offensive Kyle Shanahan will be entering the head-coaching ranks with the 49ers next season, too.

Atlanta coach Dan Quinn made an announcement to coaches that Shanahan would be the 49ers’ next coach, Mike Silver of the NFL Network reported Wednesday, adding everyone in the room was “super supportive.”

On Wednesday, Quinn was asked at a press conference about Shanahan and the 49ers.

“I know it’s for sure out there, (but it’s) definitely not our story to tell,” Quinn said. “They (the 49ers) will for sure reach out to (general manager) Thomas (Dimitroff) and to the organization and there will be a window for them if they’d like to visit with him for next week. But that’s really where it’s at, and there’s nothing left to do until then."

The Falcons will face the Green Bay Packers on Sunday in the NFC Championship game. The 49ers will have a second interview with Shanahan after the game. Shanahan will also become involved in the process to hire the 49ers’ next general manager.

The 49ers are checking with the NFL to determine what is allowable under the league’s anti-tampering policy, according to a league source. If the Falcons win on Sunday, the 49ers would not be able to officially hire Shanahan until after the Super Bowl on Feb. 5.

According to sources, the 49ers have narrowed their initial search for the next general manager to four candidates: Eliot Wolf and Brian Gutekunst of Green Bay, Minnesota’s George Paton and Terry McDonough of Arizona.

The general manager candidates are expected to meet with Shanahan, but it’s unclear whether Shanahan can interview the candidates if the Falcons advance to the Super Bowl and he is not officially the 49ers’ coach. The 49ers are expected to hold a second round of general manager interviews early next week and could fill the position by the end of next week.