Who is still undefeated in NFL?

The team that is still undefeated in the NFL is the one that has won all of its games and has not lost any. As of my knowledge, there are currently no teams that are still undefeated in the NFL. In the past, some teams have had undefeated seasons, meaning they won all of their games in a single season. One famous example is the 1972 Miami Dolphins, who won all 14 regular-season games and went on to win the Super Bowl, finishing with a perfect record of 17-0. However, in any given NFL season, teams can have winning streaks or go undefeated for a few games but eventually face a loss.