What NFL team won four consecutive Super Bowls?

The Buffalo Bills are the only team to appear in four consecutive Super Bowls (losing all of them). Dallas and Pittsburgh (and New England after February 1, 2015) have the most appearances (8) followed by Denver (7) and San Francisco (6). The NYG, Green Bay, Washington, Oakland and Miami have 5 each, while Minnesota and Indianapolis round out the group of teams that have appeared 4 or more times.