Complex sentence: Area code 407 is the area code centered principally on Orlando, Florida, but also including all of Orange, Osceola, and Seminole counties, as well as small portions of Volusia and Lake counties.
Split into simpler sentences: Area code 407 is the area code centered principally on Orlando, Florida. It serves all of Orange, Osceola, and Seminole counties, as well as small portions of Volusia and Lake counties.