Area code · MD
301 area code
The 301 area code serves Silver Spring, Maryland. Look up a specific 301 number, check spam reports, and stop spam calls automatically.
schedule2 min readUpdated May 15, 2026By the Halo team
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Location
Silver Spring, MD
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Timezone
Eastern
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State
Maryland
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Major cities
Silver Spring, Rockville, Bethesda
ABOUTAbout the 301 area code
The 301 area code is assigned to Silver Spring, Maryland. Phone numbers with this area code are used by residents and businesses in the Silver Spring metropolitan area and surrounding communities.
If you've received an unwanted call from a 301 area code number, use the Halo phone lookup tool to check if it has been reported as spam. Halo AI blocks 99% of spam calls at the network level, protecting you from robocalls, scams, and telemarketers before they ever reach your phone.
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