Frederick County, Maryland Frederick County, Maryland Frederick County is located in the northern part of the U.S. state of Maryland. As of the 2010 U.S. Census, the population was 240,336. The county seat is Frederick. Frederick County is included in the Washington-Arlington-Alexandria, DC-VA-MD-WV Metropolitan Statistical Area. Like other outlying sections of the Washington metropolitan area, Frederick County has experienced a rapid population increase in recent years. It borders the southern border of Pennsylvania and the northeastern border of Virginia. The county is home to Catoctin Mountain Park (encompassing the presidential retreat Camp David) and to the U.S. Army's Fort Detrick. It has also
Verizon Washington, DC all of its operating companies. C&P Telephone Co. was renamed Bell Atlantic Washington, DC, Inc. After Bell Atlantic's merger with GTE in 2000, the system was renamed Verizon, and so were its Bell Operating Companies. Bell Atlantic Washington, DC, Inc., was renamed Verizon Washington, DC, Inc. Verizon Washington, DC The Chesapeake and Potomac Telephone Company was founded in June 1883. C&P Telephone Co. provided telephone service to Washington, D.C. In July 1969, President Richard Nixon's telephone call to astronauts on the moon originated from C&P Telephone Co. equipment. After AT&T's 1969 corporate identity overhaul, which included the famous Saul Bass