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301 Area Code — Scam Calls, Location & Who's Calling

Area code 301 serves Maryland in the Eastern time zone, in service since 1947. The FCC has 5,777 unwanted-call complaints against 4,355 different 301 numbers on record. Look up the exact number that called you below.

Most-reported 301 numbers

Ranked by FCC unwanted-call complaints. Click a number for its full report.

301 unwanted-call complaints, last 12 months

Monthly FCC complaint volume against 301 numbers. Spikes usually mark an active robocall campaign cycling through the code.

Carriers operating in 301

Carriers assigned to 301 prefixes that visitors have looked up so far — resolved from official NPA-NXX assignment records.

  • VERIZON MARYLAND, INC.I · 64 prefixes
  • MCIMETRO ACCESS TRANSMISSION SERVICES LLCC · 14 prefixes
  • LEVEL 3 COMMUNICATIONS, LLC - MDC · 8 prefixes
  • NEW CINGULAR WIRELESS PCS, LLC - DCWireless · 8 prefixes
  • TELEPORT COMMUNICATIONS AMERICA, LLC - DCC · 6 prefixes
  • COMCAST IP PHONE, LLCC · 4 prefixes
  • CORE COMMUNICATIONS, INC.- MDC · 4 prefixes
  • BANDWIDTH.COM CLEC, LLC - MDC · 3 prefixes

About area code 301

Serves
Maryland
Time zone
Eastern
In service since
1947-01-01
Overlay
Yes — 10-digit dialing

Source: NANPA numbering records, refreshed weekly.

Spam calls from 301? What to know

Seeing repeated missed calls from 301 numbers you don't recognize is the classic signature of neighbor-spoofing robocall campaigns. The caller isn't necessarily in Maryland — spoofing software displays whatever digits the campaign chooses. Never call unknown numbers back; look them up first, and report unwanted calls to the FCC to build the public record.

Area code 301 FAQs

Where is area code 301?

Area code 301 serves Maryland, in the Eastern time zone. It is part of an overlay complex, so multiple area codes serve the same territory and 10-digit dialing is required. It has been in service since 1947.

Why do I keep getting calls from 301 numbers?

Robocallers use "neighbor spoofing" — displaying a number with a local area code to make you more likely to answer. A call showing area code 301 may not originate from Maryland at all. Look up the full 10-digit number on this site to see its complaint history before calling back.

Are 301 numbers safe to call back?

Area codes themselves are neither safe nor unsafe — 301 contains millions of legitimate lines alongside any spoofed or spam numbers. The FCC has logged 5,777 unwanted-call complaints against 4,355 distinct 301 numbers in our current data window. Check the specific number's report page before returning a missed call.