Call Frederick, Maryland, United States

To call Frederick:

Dial: 1 X

If you are behind a switchboard, you may have to type first « 0 », « 9 » or another number to reach an external line. It may be the case if you are in a business office.

Number	Explanation
1	International dialing code used to dial to United States
X	Replace X with the local number you want to reach

If you are calling from within the United States, you don't have to use a country code to make an international call. Instead, you can just dial directly without any codes.

If the person you're calling got their phone number when they lived in Frederick, their number might start with the area code 240 or 301.

Dial: 240 X

Dial: 301 X

Number	Explanation
240	Local area code used to dial to Frederick
301	Local area code used to dial to Frederick
X	Replace X with the local number you want to reach

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