Area Code (301) Information:

State: Maryland - MD

Major Cities: Williamsport, Potomac, Damascus, Lake Linganore, District Heights, Leonardtown, Bowie, Boonsboro, Middletown, Hollywood, Graceham, Capitol Heights, Brunswick, Laurel, Accokeek, Jefferson, Dentsville, Highland, Glenarden, Smithsburg

Major Carriers: Sprint Spectrum L.p., Nextel Communications, Inc., Verizon Maryland, Inc., Omnipoint Communications Cap Operations, Llc, Cellco Partnership Dba Verizon Wireless - Md, Southwestern Bell Mobile Systems, Llc - Dc, Dobson Cellular Systems, Inc., Nationsline, Inc.-md, Core Communications, Inc. - Pa, Us Lec Of Virginia, Llc - Dc, Level 3 Communications, Llc - Md, Idt America, Corp. - Md, Broadwing Communications. Llc - Md, Cavalier Telephone Mid-atlantic. Llc - Md, Telcove Operations, Inc. - Md, Comcast Phone Of Maryland, Inc. - Md, Teleport Communications Group, Inc. - Dc, Mci Worldcom Communications, Inc. - Md, Paetec Communications, Inc. - Md, Pac-west Telecomm, Inc. - Md