Area Code Profile
Area Code 240 Prefixes & Exchanges
Serving Germantown, Maryland, Unites States
Central Office Exchanges (Prefixes)
Select any prefix below to view phone lines, carrier networks, and consumer reports in that exchange:
| Exchange Prefix | City / Location | Line Type |
|---|---|---|
| 1-240-201-#### | Ridge | Landline |
| 1-240-203-#### | Hagerstown | Wireless |
| 1-240-204-#### | Bethesda | Wireless |
| 1-240-205-#### | Cabin John | Wireless |
| 1-240-206-#### | Glenn Dale | Landline |
| 1-240-207-#### | Damascus | Landline |
| 1-240-208-#### | La Plata | Landline |
| 1-240-209-#### | Indian Head | Landline |
| 1-240-210-#### | Waldorf | Wireless |
| 1-240-212-#### | Oakland | Landline |
| 1-240-213-#### | Waldorf | Landline |
| 1-240-214-#### | Mechanicsville | Landline |
| 1-240-215-#### | Frederick | Landline |
| 1-240-216-#### | Waldorf | Wireless |
| 1-240-217-#### | Hagerstown | Wireless |
| 1-240-218-#### | Nanjemoy | Landline |
| 1-240-220-#### | Poolesville | Landline |
| 1-240-221-#### | Rockville | Landline |
| 1-240-222-#### | Waldorf | Landline |
| 1-240-223-#### | Mount Rainier | Landline |
| 1-240-224-#### | Gaithersburg | Wireless |
| 1-240-225-#### | Frederick | Landline |
| 1-240-228-#### | Laurel | Landline |
| 1-240-229-#### | Waldorf | Landline |
| 1-240-230-#### | Hughesville | Landline |
| 1-240-231-#### | Hagerstown | Landline |
| 1-240-232-#### | Mount Rainier | Landline |
| 1-240-233-#### | Newburg | Landline |
| 1-240-234-#### | Mount Rainier | Wireless |
| 1-240-235-#### | Bethesda | Landline |
| 1-240-236-#### | Frederick | Landline |
| 1-240-237-#### | Callaway | Landline |
| 1-240-238-#### | Rockville | Landline |
| 1-240-239-#### | Leonardtown | Landline |
| 1-240-241-#### | Chevy Chase | Landline |
| 1-240-242-#### | Kensington | Landline |
| 1-240-243-#### | Gaithersburg | Landline |
| 1-240-244-#### | Mount Rainier | Landline |
| 1-240-245-#### | Glenn Dale | Landline |
| 1-240-246-#### | Gaithersburg | Landline |
| 1-240-247-#### | Mount Rainier | Landline |
| 1-240-248-#### | Ridge | Landline |
| 1-240-249-#### | Mechanicsville | Landline |
| 1-240-250-#### | Brandywine | Landline |
| 1-240-251-#### | Highfield | Landline |
| 1-240-252-#### | Gaithersburg | Landline |
| 1-240-253-#### | Mount Rainier | Landline |
| 1-240-254-#### | Hughesville | Landline |
| 1-240-255-#### | Poolesville | Landline |
| 1-240-256-#### | Leonardtown | Landline |
| 1-240-257-#### | Nanjemoy | Landline |
| 1-240-258-#### | Ridge | Landline |
| 1-240-260-#### | Mount Rainier | Landline |
| 1-240-262-#### | Callaway | Wireless |
| 1-240-263-#### | Bethesda | Wireless |
| 1-240-264-#### | Beltsville | Landline |
| 1-240-265-#### | Bethesda | Wireless |
| 1-240-266-#### | Mount Rainier | Landline |
| 1-240-268-#### | Rockville | Landline |
| 1-240-269-#### | Mount Rainier | Landline |
| 1-240-270-#### | Waldorf | Wireless |
| 1-240-271-#### | Bethesda | Wireless |
| 1-240-272-#### | Bethesda | Wireless |
| 1-240-273-#### | Mount Rainier | Landline |
| 1-240-274-#### | Bethesda | Wireless |
| 1-240-275-#### | Grantsville | Landline |
| 1-240-276-#### | Rockville | Landline |
| 1-240-277-#### | Bethesda | Wireless |
| 1-240-278-#### | Laurel | Wireless |
| 1-240-279-#### | Waldorf | Landline |
| 1-240-280-#### | Laurel | Landline |
| 1-240-281-#### | Bethesda | Wireless |
| 1-240-282-#### | Mechanicsville | Landline |
| 1-240-283-#### | Kensington | Landline |
| 1-240-284-#### | Frostburg | Landline |
| 1-240-285-#### | Frederick | Landline |
| 1-240-286-#### | Bethesda | Wireless |
| 1-240-287-#### | Hancock | Landline |
| 1-240-288-#### | Thurmont | Landline |
| 1-240-289-#### | Oxon Hill | Landline |
| 1-240-290-#### | Mount Rainier | Landline |
| 1-240-291-#### | Hagerstown | Wireless |
| 1-240-292-#### | Kensington | Landline |
| 1-240-293-#### | Mount Rainier | Landline |
| 1-240-294-#### | Laurel | Landline |
| 1-240-295-#### | Laurel | Landline |
| 1-240-296-#### | Hyattsville | Landline |
| 1-240-297-#### | College Park | Landline |
| 1-240-298-#### | Leonardtown | Wireless |
| 1-240-299-#### | Waldorf | Wireless |
| 1-240-300-#### | Waldorf | Wireless |
| 1-240-303-#### | Clinton | Landline |
| 1-240-304-#### | Mount Rainier | Wireless |
| 1-240-305-#### | Beltsville | Wireless |
| 1-240-306-#### | Gaithersburg | Landline |
| 1-240-307-#### | Emmitsburg | Landline |
| 1-240-308-#### | Damascus | Wireless |
| 1-240-309-#### | Leonardtown | Wireless |
| 1-240-310-#### | Hagerstown | Wireless |
| 1-240-312-#### | Capitol Heights | Landline |
| 1-240-313-#### | Hagerstown | Landline |
| 1-240-314-#### | Rockville | Landline |
| 1-240-315-#### | Frederick | Landline |
| 1-240-316-#### | Chevy Chase | Wireless |
| 1-240-317-#### | Callaway | Landline |
| 1-240-318-#### | Clinton | Landline |
| 1-240-319-#### | Columbia | Wireless |
| 1-240-320-#### | Waldorf | Landline |
| 1-240-321-#### | Oakland | Wireless |
| 1-240-322-#### | Mccoole | Landline |
| 1-240-323-#### | Emmitsburg | Landline |
| 1-240-324-#### | Clarksville | Landline |
| 1-240-325-#### | Damascus | Landline |
| 1-240-326-#### | Upper Marlboro | Landline |
| 1-240-327-#### | Gaithersburg | Landline |
| 1-240-328-#### | Rockville | Landline |
| 1-240-329-#### | Hagerstown | Landline |
| 1-240-330-#### | Cabin John | Wireless |
| 1-240-331-#### | Mount Rainier | Landline |
| 1-240-332-#### | Newburg | Landline |
| 1-240-333-#### | Mount Rainier | Landline |
| 1-240-334-#### | Mount Rainier | Landline |
| 1-240-335-#### | Glenn Dale | Landline |
| 1-240-336-#### | Bethesda | Landline |
| 1-240-337-#### | Mount Rainier | Landline |
| 1-240-338-#### | Silver Spring | Wireless |
| 1-240-339-#### | Upper Marlboro | Landline |
| 1-240-340-#### | Bethesda | Wireless |
| 1-240-341-#### | Adamstown | Landline |
| 1-240-342-#### | Sandy Spring | Landline |
| 1-240-343-#### | Hancock | Wireless |
| 1-240-344-#### | Frederick | Wireless |
| 1-240-345-#### | Sandy Spring | Landline |
| 1-240-346-#### | Waldorf | Wireless |
| 1-240-347-#### | Hagerstown | Landline |
| 1-240-348-#### | Oxon Hill | Landline |
| 1-240-349-#### | La Plata | Landline |
| 1-240-350-#### | Beltsville | Wireless |
| 1-240-351-#### | Beltsville | Wireless |
| 1-240-352-#### | La Plata | Landline |
| 1-240-353-#### | Beltsville | Wireless |
| 1-240-354-#### | Beltsville | Wireless |
| 1-240-355-#### | Beltsville | Wireless |
| 1-240-356-#### | Frederick | Landline |
| 1-240-357-#### | Frederick | Wireless |
| 1-240-358-#### | Damascus | Landline |
| 1-240-359-#### | Indian Head | Landline |
| 1-240-360-#### | Laurel | Wireless |
| 1-240-361-#### | Gaithersburg | Landline |
| 1-240-362-#### | Cumberland | Landline |
| 1-240-363-#### | Kensington | Landline |
| 1-240-364-#### | Gaithersburg | Landline |
| 1-240-365-#### | Damascus | Landline |
| 1-240-366-#### | Williamsport | Landline |
| 1-240-367-#### | Frederick | Wireless |
| 1-240-368-#### | Waldorf | Landline |
| 1-240-369-#### | Mount Airy | Landline |
| 1-240-370-#### | Bethesda | Wireless |
| 1-240-371-#### | Mount Rainier | Landline |
| 1-240-372-#### | Gaithersburg | Wireless |
| 1-240-373-#### | Odenton | Landline |
| 1-240-374-#### | Laurel | Landline |
| 1-240-375-#### | Capitol Heights | Wireless |
| 1-240-376-#### | Hughesville | Landline |
| 1-240-377-#### | Indian Head | Landline |
| 1-240-378-#### | Cumberland | Landline |
| 1-240-379-#### | Frederick | Landline |
| 1-240-380-#### | Cabin John | Wireless |
| 1-240-381-#### | Silver Spring | Wireless |
| 1-240-382-#### | Hagerstown | Landline |
| 1-240-383-#### | Chevy Chase | Wireless |
| 1-240-384-#### | Callaway | Landline |
| 1-240-385-#### | Myersville | Landline |
| 1-240-386-#### | Gaithersburg | Landline |
| 1-240-387-#### | Chevy Chase | Landline |
| 1-240-388-#### | Gaithersburg | Wireless |
| 1-240-389-#### | Sandy Spring | Landline |
| 1-240-390-#### | Sandy Spring | Landline |
| 1-240-391-#### | Mount Rainier | Landline |
| 1-240-392-#### | Oxon Hill | Landline |
| 1-240-393-#### | Cabin John | Wireless |
| 1-240-394-#### | Mount Airy | Wireless |
| 1-240-395-#### | Bethesda | Landline |
| 1-240-396-#### | Mount Rainier | Landline |
| 1-240-397-#### | Frederick | Wireless |
| 1-240-398-#### | Cabin John | Wireless |
| 1-240-399-#### | Chevy Chase | Landline |
| 1-240-400-#### | Bethesda | Wireless |
| 1-240-401-#### | Rockville | Wireless |
| 1-240-402-#### | College Park | Landline |
| 1-240-403-#### | Rockville | Landline |
| 1-240-404-#### | Gaithersburg | Landline |
| 1-240-405-#### | Frederick | Landline |
| 1-240-406-#### | Rockville | Wireless |
| 1-240-407-#### | Mount Rainier | Landline |
| 1-240-408-#### | Rockville | Wireless |
| 1-240-409-#### | Frederick | Wireless |
| 1-240-412-#### | Waldorf | Wireless |
| 1-240-413-#### | Hyattsville | Wireless |
| 1-240-414-#### | Mount Rainier | Landline |
| 1-240-415-#### | Frederick | Landline |
| 1-240-416-#### | Waldorf | Wireless |
| 1-240-417-#### | Capitol Heights | Wireless |
| 1-240-418-#### | Beltsville | Wireless |
| 1-240-419-#### | Waldorf | Wireless |
| 1-240-420-#### | Hagerstown | Landline |
| 1-240-421-#### | Rockville | Wireless |
| 1-240-422-#### | Frederick | Wireless |
| 1-240-423-#### | Silver Spring | Wireless |
| 1-240-424-#### | Mount Rainier | Wireless |
| 1-240-425-#### | Cabin John | Landline |
| 1-240-426-#### | Bethesda | Wireless |
| 1-240-427-#### | Waldorf | Landline |
| 1-240-428-#### | Rockville | Landline |
| 1-240-429-#### | Silver Spring | Wireless |
| 1-240-430-#### | Kensington | Landline |
| 1-240-431-#### | Tall Timbers | Wireless |
| 1-240-432-#### | Beltsville | Wireless |
| 1-240-433-#### | Silver Spring | Landline |
| 1-240-434-#### | Leonardtown | Landline |
| 1-240-435-#### | Waldorf | Wireless |
| 1-240-436-#### | Ijamsville | Landline |
| 1-240-437-#### | Sandy Spring | Landline |
| 1-240-438-#### | Silver Spring | Wireless |
| 1-240-439-#### | Frederick | Wireless |
| 1-240-440-#### | Frederick | Wireless |
| 1-240-441-#### | Oxon Hill | Wireless |
| 1-240-442-#### | Oakland | Landline |
| 1-240-444-#### | Laurel | Wireless |
| 1-240-445-#### | Bethesda | Wireless |
| 1-240-446-#### | Frederick | Wireless |
| 1-240-447-#### | Rockville | Wireless |
| 1-240-448-#### | Waldorf | Wireless |
| 1-240-449-#### | Gaithersburg | Wireless |
| 1-240-450-#### | Silver Spring | Landline |
| 1-240-452-#### | Hagerstown | Landline |
| 1-240-453-#### | Rockville | Landline |
| 1-240-454-#### | Gaithersburg | Wireless |
| 1-240-455-#### | Oxon Hill | Landline |
| 1-240-456-#### | Laurel | Landline |
| 1-240-457-#### | Frederick | Wireless |
| 1-240-458-#### | Waldorf | Wireless |
| 1-240-459-#### | Laurel | Wireless |
| 1-240-460-#### | Silver Spring | Wireless |
| 1-240-461-#### | Silver Spring | Wireless |
| 1-240-462-#### | Beltsville | Wireless |
| 1-240-463-#### | Silver Spring | Wireless |
| 1-240-464-#### | Chevy Chase | Landline |
| 1-240-465-#### | Mount Rainier | Landline |
| 1-240-466-#### | Mechanicsville | Wireless |
| 1-240-467-#### | Oxon Hill | Landline |
| 1-240-468-#### | Mount Rainier | Wireless |
| 1-240-469-#### | Hagerstown | Wireless |
| 1-240-470-#### | Laurel | Wireless |
| 1-240-471-#### | Silver Spring | Landline |
| 1-240-472-#### | Silver Spring | Wireless |
| 1-240-473-#### | College Park | Landline |
| 1-240-475-#### | Silver Spring | Wireless |
| 1-240-476-#### | Silver Spring | Wireless |
| 1-240-477-#### | Gaithersburg | Landline |
| 1-240-478-#### | Cabin John | Wireless |
| 1-240-479-#### | Oxon Hill | Wireless |
| 1-240-480-#### | Bethesda | Wireless |
| 1-240-481-#### | Silver Spring | Wireless |
| 1-240-482-#### | Cabin John | Landline |
| 1-240-483-#### | Oxon Hill | Landline |
| 1-240-485-#### | Cabin John | Landline |
| 1-240-486-#### | Glenn Dale | Wireless |
| 1-240-487-#### | Hyattsville | Landline |
| 1-240-488-#### | Oakland | Landline |
| 1-240-489-#### | Poolesville | Landline |
| 1-240-490-#### | Middletown | Wireless |
| 1-240-491-#### | Mount Rainier | Landline |
| 1-240-492-#### | Capitol Heights | Landline |
| 1-240-493-#### | Oxon Hill | Landline |
| 1-240-494-#### | Mount Rainier | Landline |
| 1-240-495-#### | Mount Rainier | Wireless |
| 1-240-497-#### | Chevy Chase | Landline |
| 1-240-498-#### | Beltsville | Wireless |
| 1-240-499-#### | Cabin John | Landline |
| 1-240-500-#### | Hagerstown | Landline |
| 1-240-501-#### | Silver Spring | Wireless |
| 1-240-502-#### | Silver Spring | Wireless |
| 1-240-503-#### | Newburg | Landline |
| 1-240-504-#### | Silver Spring | Wireless |
| 1-240-505-#### | Silver Spring | Wireless |
| 1-240-506-#### | Rockville | Wireless |
| 1-240-507-#### | Cabin John | Wireless |
| 1-240-508-#### | Capitol Heights | Wireless |
| 1-240-509-#### | Crofton | Landline |
| 1-240-510-#### | Upper Marlboro | Landline |
| 1-240-512-#### | College Park | Landline |
| 1-240-513-#### | Hagerstown | Wireless |
| 1-240-514-#### | Cabin John | Landline |
| 1-240-515-#### | Bethesda | Wireless |
| 1-240-516-#### | Silver Spring | Landline |
| 1-240-518-#### | Waldorf | Wireless |
| 1-240-519-#### | Bethesda | Wireless |
| 1-240-520-#### | Hagerstown | Wireless |
| 1-240-522-#### | Cumberland | Wireless |
| 1-240-523-#### | La Plata | Landline |
| 1-240-524-#### | Laurel | Landline |
| 1-240-525-#### | Upper Marlboro | Landline |
| 1-240-526-#### | Leonardtown | Landline |
| 1-240-527-#### | Hagerstown | Landline |
| 1-240-528-#### | Hughesville | Landline |
| 1-240-529-#### | Frederick | Landline |
| 1-240-530-#### | Waldorf | Landline |
| 1-240-532-#### | Oxon Hill | Wireless |
| 1-240-533-#### | Mount Rainier | Landline |
| 1-240-535-#### | Silver Spring | Wireless |
| 1-240-536-#### | Sandy Spring | Landline |
| 1-240-538-#### | Leonardtown | Landline |
| 1-240-539-#### | Mount Rainier | Landline |
| 1-240-541-#### | Bethesda | Wireless |
| 1-240-542-#### | College Park | Landline |
| 1-240-543-#### | Bethesda | Wireless |
| 1-240-544-#### | Glenn Dale | Landline |
| 1-240-545-#### | Upper Marlboro | Landline |
| 1-240-546-#### | Clinton | Landline |
| 1-240-547-#### | Laurel | Landline |
| 1-240-548-#### | Mount Rainier | Landline |
| 1-240-550-#### | Rockville | Wireless |
| 1-240-551-#### | Rockville | Wireless |
| 1-240-552-#### | Rockville | Wireless |
| 1-240-553-#### | Mount Rainier | Landline |
| 1-240-554-#### | Laurel | Landline |
| 1-240-556-#### | Glenn Dale | Landline |
| 1-240-558-#### | Kensington | Landline |
| 1-240-559-#### | Sandy Spring | Landline |
| 1-240-560-#### | Chevy Chase | Landline |
| 1-240-561-#### | Leonardtown | Wireless |
| 1-240-565-#### | Laurel | Wireless |
| 1-240-566-#### | Frederick | Landline |
| 1-240-567-#### | Rockville | Landline |
| 1-240-568-#### | Laurel | Landline |
| 1-240-573-#### | Upper Marlboro | Landline |
| 1-240-575-#### | Frederick | Landline |
| 1-240-577-#### | Leonardtown | Wireless |
| 1-240-578-#### | Frederick | Wireless |
| 1-240-580-#### | Cumberland | Wireless |
| 1-240-581-#### | Laurel | Landline |
| 1-240-582-#### | Hyattsville | Landline |
| 1-240-583-#### | Beltsville | Landline |
| 1-240-585-#### | Waldorf | Wireless |
| 1-240-586-#### | Frederick | Landline |
| 1-240-587-#### | Leonardtown | Wireless |
| 1-240-593-#### | Laurel | Wireless |
| 1-240-595-#### | Chevy Chase | Wireless |
| 1-240-597-#### | Gaithersburg | Landline |
| 1-240-599-#### | Rockville | Landline |
| 1-240-600-#### | Mount Rainier | Wireless |
| 1-240-601-#### | Beltsville | Wireless |
| 1-240-602-#### | Beltsville | Wireless |
| 1-240-603-#### | Beltsville | Wireless |
| 1-240-604-#### | Beltsville | Wireless |
| 1-240-605-#### | Beltsville | Wireless |
| 1-240-606-#### | Beltsville | Wireless |
| 1-240-607-#### | Waldorf | Landline |
| 1-240-608-#### | Frederick | Wireless |
| 1-240-612-#### | Mount Rainier | Landline |
| 1-240-613-#### | Hyattsville | Landline |
| 1-240-614-#### | Rockville | Wireless |
| 1-240-615-#### | Hyattsville | Wireless |
| 1-240-616-#### | College Park | Landline |
| 1-240-617-#### | Unknown | |
| 1-240-619-#### | Chevy Chase | Landline |
| 1-240-620-#### | Rockville | Landline |
| 1-240-621-#### | Kensington | Landline |
| 1-240-624-#### | Greenbelt | Landline |
| 1-240-625-#### | Hagerstown | Wireless |
| 1-240-626-#### | Frederick | Wireless |
| 1-240-627-#### | Mount Rainier | Landline |
| 1-240-629-#### | Frederick | Landline |
| 1-240-630-#### | Mount Rainier | Landline |
| 1-240-631-#### | Gaithersburg | Landline |
| 1-240-632-#### | Gaithersburg | Landline |
| 1-240-638-#### | Mount Rainier | Landline |
| 1-240-640-#### | Waldorf | Wireless |
| 1-240-643-#### | Silver Spring | Wireless |
| 1-240-644-#### | Chevy Chase | Landline |
| 1-240-645-#### | Chevy Chase | Landline |
| 1-240-646-#### | Laurel | Landline |
| 1-240-650-#### | Cabin John | Landline |
| 1-240-651-#### | Frederick | Wireless |
| 1-240-652-#### | Mechanicsville | Landline |
| 1-240-654-#### | Gaithersburg | Wireless |
| 1-240-662-#### | Silver Spring | Landline |
| 1-240-667-#### | Mount Rainier | Landline |
| 1-240-668-#### | Damascus | Landline |
| 1-240-669-#### | Kensington | Landline |
| 1-240-670-#### | Mount Rainier | Landline |
| 1-240-671-#### | Mount Rainier | Wireless |
| 1-240-672-#### | Rockville | Landline |
| 1-240-674-#### | Frederick | Wireless |
| 1-240-675-#### | Myersville | Wireless |
| 1-240-676-#### | Silver Spring | Wireless |
| 1-240-678-#### | Silver Spring | Wireless |
| 1-240-682-#### | Waldorf | Landline |
| 1-240-683-#### | Gaithersburg | Landline |
| 1-240-684-#### | Greenbelt | Landline |
| 1-240-685-#### | Brandywine | Landline |
| 1-240-686-#### | Gaithersburg | Landline |
| 1-240-687-#### | Silver Spring | Wireless |
| 1-240-688-#### | Silver Spring | Wireless |
| 1-240-691-#### | Mount Rainier | Landline |
| 1-240-694-#### | Rockville | Landline |
| 1-240-695-#### | Temple Hills | Landline |
| 1-240-696-#### | Hyattsville | Landline |
| 1-240-699-#### | Adamstown | Landline |
| 1-240-701-#### | Silver Spring | Wireless |
| 1-240-704-#### | Mount Rainier | Wireless |
| 1-240-705-#### | Chevy Chase | Wireless |
| 1-240-706-#### | Chevy Chase | Wireless |
| 1-240-707-#### | Hagerstown | Wireless |
| 1-240-708-#### | Columbia | Wireless |
| 1-240-712-#### | Columbia | Wireless |
| 1-240-713-#### | Laurel | Landline |
| 1-240-715-#### | Rockville | Landline |
| 1-240-716-#### | Mount Rainier | Wireless |
| 1-240-718-#### | Callaway | Landline |
| 1-240-720-#### | Gaithersburg | Landline |
| 1-240-722-#### | Sandy Spring | Landline |
| 1-240-723-#### | Silver Spring | Landline |
| 1-240-724-#### | Mount Rainier | Landline |
| 1-240-725-#### | Lexington Park | Landline |
| 1-240-727-#### | Cumberland | Wireless |
| 1-240-731-#### | Rockville | Wireless |
| 1-240-734-#### | Hagerstown | Landline |
| 1-240-737-#### | Mount Rainier | Landline |
| 1-240-743-#### | Oxon Hill | Landline |
| 1-240-744-#### | Mount Rainier | Landline |
| 1-240-745-#### | Damascus | Landline |
| 1-240-747-#### | Mount Rainier | Landline |
| 1-240-750-#### | Gaithersburg | Wireless |
| 1-240-751-#### | Gaithersburg | Landline |
| 1-240-752-#### | Bethesda | Landline |
| 1-240-753-#### | Rockville | Landline |
| 1-240-754-#### | Waldorf | Landline |
| 1-240-755-#### | Laurel | Landline |
| 1-240-757-#### | Mount Rainier | Landline |
| 1-240-762-#### | Mount Rainier | Wireless |
| 1-240-764-#### | Chevy Chase | Landline |
| 1-240-765-#### | Chevy Chase | Landline |
| 1-240-766-#### | Chevy Chase | Landline |
| 1-240-767-#### | Capitol Heights | Landline |
| 1-240-770-#### | Oxon Hill | Landline |
| 1-240-772-#### | Frederick | Wireless |
| 1-240-773-#### | Rockville | Landline |
| 1-240-776-#### | La Plata | Landline |
| 1-240-777-#### | Rockville | Landline |
| 1-240-778-#### | Chevy Chase | Landline |
| 1-240-779-#### | Sandy Spring | Landline |
| 1-240-780-#### | Gaithersburg | Landline |
| 1-240-782-#### | Damascus | Landline |
| 1-240-783-#### | Bethesda | Wireless |
| 1-240-784-#### | Myersville | Wireless |
| 1-240-786-#### | Laurel | Landline |
| 1-240-787-#### | Brandywine | Landline |
| 1-240-788-#### | Oxon Hill | Landline |
| 1-240-790-#### | Mount Rainier | Landline |
| 1-240-793-#### | Gaithersburg | Wireless |
| 1-240-794-#### | Callaway | Landline |
| 1-240-800-#### | Chevy Chase | Landline |
| 1-240-801-#### | Gaithersburg | Wireless |
| 1-240-802-#### | Bethesda | Wireless |
| 1-240-803-#### | Cumberland | Wireless |
| 1-240-804-#### | Newburg | Landline |
| 1-240-812-#### | Poolesville | Landline |
| 1-240-813-#### | Gaithersburg | Landline |
| 1-240-818-#### | Smithsburg | Landline |
| 1-240-821-#### | Silver Spring | Landline |
| 1-240-823-#### | Brandywine | Landline |
| 1-240-826-#### | Rockville | Landline |
| 1-240-832-#### | Bethesda | Wireless |
| 1-240-833-#### | Chevy Chase | Landline |
| 1-240-837-#### | Hughesville | Landline |
| 1-240-838-#### | Oxon Hill | Wireless |
| 1-240-839-#### | Silver Spring | Wireless |
| 1-240-841-#### | Laurel | Landline |
| 1-240-842-#### | Glenn Dale | Landline |
| 1-240-843-#### | College Park | Landline |
| 1-240-844-#### | Ridge | Landline |
| 1-240-845-#### | Chevy Chase | Landline |
| 1-240-846-#### | Clinton | Landline |
| 1-240-848-#### | Gaithersburg | Wireless |
| 1-240-855-#### | Cabin John | Wireless |
| 1-240-857-#### | Mount Rainier | Landline |
| 1-240-863-#### | Laurel | Landline |
| 1-240-864-#### | Rockville | Landline |
| 1-240-865-#### | Baltimore | Landline |
| 1-240-868-#### | Mount Rainier | Landline |
| 1-240-876-#### | Bethesda | Wireless |
| 1-240-880-#### | Chevy Chase | Landline |
| 1-240-882-#### | Capitol Heights | Wireless |
| 1-240-883-#### | Sandy Spring | Landline |
| 1-240-888-#### | Rockville | Wireless |
| 1-240-892-#### | Upper Marlboro | Landline |
| 1-240-893-#### | Silver Spring | Wireless |
| 1-240-895-#### | Lexington Park | Landline |
| 1-240-897-#### | Mount Rainier | Landline |
| 1-240-898-#### | Mount Rainier | Landline |
| 1-240-899-#### | Bethesda | Wireless |
| 1-240-901-#### | Unknown | |
| 1-240-903-#### | Indian Head | Landline |
| 1-240-912-#### | Gaithersburg | Landline |
| 1-240-920-#### | Cumberland | Landline |
| 1-240-925-#### | Leonardtown | Wireless |
| 1-240-929-#### | Mount Rainier | Landline |
| 1-240-938-#### | Ashton | Wireless |
| 1-240-949-#### | Mount Rainier | Landline |
| 1-240-964-#### | Cumberland | Landline |
| 1-240-965-#### | College Park | Landline |
| 1-240-976-#### | Unknown | |
| 1-240-979-#### | Cumberland | Landline |
| 1-240-986-#### | Nanjemoy | Landline |
| 1-240-988-#### | Beltsville | Wireless |
| 1-240-993-#### | Indian Head | Landline |
| 1-240-994-#### | Rockville | Wireless |
| 1-240-997-#### | Silver Spring | Wireless |
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About Area Code 240
Area code 240 is assigned to the geographic numbering plan serving Germantown, Maryland.
Use the directory table to navigate through central office prefixes and explore individual telephone lines.