Located in the Eastern (GMT -05:00) time zone. Area code 301 serves the state of Maryland. This area code was assigned on January 1st, 1947. On January 1st, 1947 it went into service. 301 is a General Purpose Code. 301 service area does overlap with 240 area codes. Dialing pattern for local calls within the same NPA (area code) is 10D.
Information for Area Code 301
Area Code
301
Country
United States
State
Maryland (MD)
Major City
Silver Spring
Time Zone
Eastern (GMT -05:00)
Population
2,587,425
White Population
1,507,069
Black Population
777,012
Hispanic Population
177,817
Asian Population
150,435
Hawaiian Population
1,267
Indian Population
8,057
Other Population
77,825
Male Population
1,255,714
Female Population
1,331,711
Avg House Value
$167,230.68
Avg Household Income
$60,205.42
Avg Persons Per Household
2.69
Median Age
37.16
Median Age (Male)
36.32
Median Age (Female)
37.94
List of Cities in Area Code Overlay Complex 270
Frederick
Capitol Heights
Silver Spring
Hagerstown
Riverdale
Lanham
Myersville
Cumberland
Laurel
Patuxent River
Hyattsville
Accident
Indian Head
Bethesda
Gaithersburg
Rockville
Waldorf
Mount Airy
Temple Hills
Brandywine
Beltsville
Upper Marlboro
Frostburg
Westernport
Takoma Park
Ashton
Abell
Glenn Dale
La Plata
New Market
Sandy Spring
Oakland
Hancock
Clarksburg
Poolesville
Leonardtown
Keedysville
Callaway
Walkersville
Swanton
Odenton
Drayden
Riva
Knoxville
Smithsburg
Brunswick
Clear Spring
Mount Rainier
Monrovia
North Beach
Baltimore
Clinton
Mechanicsville
Grantsville
Ridge
Columbia
Accokeek
Damascus
California
Luke
Middletown
Nanjemoy
Bittinger
Cascade
Edgewater
Williamsport
Hughesville
Issue
Thurmont
Mount Savage
Emmitsburg
Oldtown
Kitzmiller
Lonaconing
List of Zip Codes in Area Code 301
20640
20816
20815
20814
20744
20735
20607
20817
21140
21037
21403
20707
20723
20724
20737
20740
20770
20877
20886
20879
20781
20710
20708
20705
20895
20852
20851
20850
20721
20716
20774
21795
20769
20706
20720
20784
20785
20812
21701
21702
21703
20853
20862
20861
20860
20901
20910
20902
20748
20745
20623
20762
20905
20904
20868
20746
21719
20613
21522
20662
20650
20872
20664
20621
20645
20715
21545
20601
20602
20603
21502
20712
20782
20912
20783
21788
20637
20722
20866
20675
20616
20855
20659
21773
20772
20711
20854
20818
21740
21742
21046
21044
21045
20747
20743
21550
20670
20837
20878
21562
21540
20871
21770
21769
20619
20636
20656
21561
21541
20695
20646
20677
20903
21756
20906
21727
21538
21539
21555
20611
21750
21774
20634
20690
20620
21532
21771
20653
21520
21531
20606
20618
20609
20714
21783
21710
21704
21716
21722
21793
20680
21233
21201
21202
21536
21113
21758
21401
21405
20630
20674
20692
SPs and Telephone companies in Area Code 270
Sprint Spectrum L.p.
Verizon Maryland, Inc.
Metro Pcs, Inc.
New Cingular Wireless Pcs, Llc - Dc
Omnipoint Communications Cap Operations, Llc
Baltimore-washington Telephone (bwt)
Teleport Communications America, Llc - Dc
Level 3 Communications, Llc - Md
Usa Mobility Wireless, Inc.
Cavalier Telephone Mid-atlantic, Llc - Md
Uscoc Of Cumberland, Inc. Dba United States Cel Md