Area Code301

Maryland, United States

Eastern Time

1:23 AM

Area Code

301

State / Province

Maryland

Country

United States

Time Zone

Eastern Time

Cities and Communities Served

AshtonAshton (Baltimore Lata)BaltimoreBittingerBrandywineBrunswickBuckeystownClear SpringCumberlandDamascusDamascus (Hagerstown Lata)EmmitsburgFlintstoneFrederickFriendsvilleFrostburgGaithersburgGrantsvilleHagerstownHancockHighfieldHughesvilleIndian HeadKeedysvilleKitzmillerLa PlataLaurelLaurel (Baltimore Lata)LeonardtownLexington Park-Great MillsLonaconingMccooleMechanicsvilleMiddletownMount AiryMount SavageMyersvilleNanjemoyNew MarketOaklandPoolesvilleRidgeSmithsburgThurmontTompkinsvilleWaldorfWalkersvilleWashingtonWesternportWilliamsport

Area code 301 covers 50 cities and communities across Maryland, based on telephone company rate center data.

tel: Link Format

Use the E.164 format for clickable phone links (RFC 3966):

<a href="tel:+13015550100">+13015550100</a>
<a href="tel:+13015550199">+13015550199</a>
Full tel: URI guide
View all United States area codes on map →

Check a 301 Number

Look up which exchange in Maryland a specific 301 number is homed to, and whether its block is wireline or wireless. See what a reverse lookup can establish before relying on the answer.

Prefix Blocks (NPA-NXX)

786 active prefixes in this area code, assigned as 4,740 thousands-blocks — pooling splits one prefix across several carriers, so each block is listed separately with the rate centre it is homed to, its carrier of record, and the switch that serves it.

Showing blocks 1–100 of 4,740

NPA-NXXBlockRate centreTypeCarrier (OCN)SwitchLATALIRDates
301-2000Indian HeadLandline or VoIPONVOY, LLC - MD (876D)TYSONS CORNER236——
301-2001Indian HeadLandline or VoIPBANDWIDTH.COM CLEC, LLC - MD (071F)WASHDCDP8MD236——
301-2002Indian HeadLandline or VoIPBANDWIDTH.COM CLEC, LLC - MD (071F)WASHDCDP8MD236——
301-2003Indian HeadLandline or VoIPMCIMETRO ACCESS TRANSMISSION SERVICES LLC (7229)WASHINGTON236——
301-2004Indian HeadLandline or VoIPLEVEL 3 COMMUNICATIONS, LLC - MD (6119)MC LEAN236——
301-2005Indian HeadLandline or VoIPBANDWIDTH.COM CLEC, LLC - MD (071F)WASHDCDP8MD236——
301-2006Indian HeadLandline or VoIPBALTIMORE-WASHINGTON TELEPHONE (BWT) (8697)CHCHMDBE1MD236——
301-2007Indian HeadLandline or VoIPBANDWIDTH.COM CLEC, LLC - MD (071F)WASHDCDP8MD236——
301-2008Indian HeadLandline or VoIPBANDWIDTH.COM CLEC, LLC - MD (071F)WASHDCDP8MD236——
301-2009Indian HeadLandline or VoIPBANDWIDTH.COM CLEC, LLC - MD (071F)WASHDCDP8MD236——
301-200AIndian HeadLandline or VoIPBANDWIDTH.COM CLEC, LLC - MD (071F)WASHDCDP8MD236——
301-2010Washington Zone 10WirelessCELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD (6395)WASKDCFNAMD236——
301-2011Washington Zone 10WirelessNEW CINGULAR WIRELESS PCS, LLC - DC (4036)CHCHMDBEWMD236——
301-2012Washington Zone 10WirelessNEW CINGULAR WIRELESS PCS, LLC - DC (4036)CHCHMDBEWMD236——
301-2013Washington Zone 10WirelessOMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC (6855)BELTSVILLE236——
301-2014Washington Zone 10WirelessOMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC (6855)BELTSVILLE236——
301-2015Washington Zone 10WirelessOMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC (6855)BELTSVILLE236——
301-2016Washington Zone 10WirelessOMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC (6855)BELTSVILLE236——
301-2017Washington Zone 10WirelessNEW CINGULAR WIRELESS PCS, LLC - DC (4036)CHCHMDBEWMD236——
301-2018Washington Zone 10WirelessNEW CINGULAR WIRELESS PCS, LLC - DC (4036)CHCHMDBEWMD236——
301-2019Washington Zone 10WirelessNEW CINGULAR WIRELESS PCS, LLC - DC (4036)CHCHMDBEWMD236——
301-201AWashington Zone 10WirelessNEW CINGULAR WIRELESS PCS, LLC - DC (4036)CHCHMDBEWMD236——
301-2020Washington Zone 2WirelessNEW CINGULAR WIRELESS PCS, LLC - DC (4036)CHCHMDBEWMD236——
301-2021Washington Zone 2Landline or VoIPBANDWIDTH.COM CLEC, LLC - MD (071F)WASHDCDP8MD236——
301-2022Washington Zone 2Landline or VoIPBANDWIDTH.COM CLEC, LLC - MD (071F)WASHDCDP8MD236——
301-2023Washington Zone 2Landline or VoIPPAETEC ITEL, LLC (829J)WASHDCSWXZZ236——
301-2024Washington Zone 2Landline or VoIPBANDWIDTH.COM CLEC, LLC - MD (071F)WASHDCDP8MD236——
301-2025Washington Zone 2Landline or VoIPYMAX COMMUNICATIONS CORP. - MD (281E)WASHINGTON236——
301-2026Washington Zone 2Landline or VoIPYMAX COMMUNICATIONS CORP. - MD (281E)WASHINGTON236——
301-2027Washington Zone 2Landline or VoIPYMAX COMMUNICATIONS CORP. - MD (281E)WASHINGTON236——
301-2028Washington Zone 2Landline or VoIPYMAX COMMUNICATIONS CORP. - MD (281E)WASHINGTON236——
301-2029Washington Zone 2Landline or VoIPYMAX COMMUNICATIONS CORP. - MD (281E)WASHINGTON236——
301-202AWashington Zone 2WirelessNEW CINGULAR WIRELESS PCS, LLC - DC (4036)CHCHMDBEWMD236——
301-203AWashington Zone 6LandlineVERIZON MARYLAND, INC. (9212)FTWSMDCPRP0236——
301-2040Washington Zone 2WirelessNEW CINGULAR WIRELESS PCS, LLC - DC (4036)CHCHMDBEWMD236——
301-2041Washington Zone 2WirelessNEW CINGULAR WIRELESS PCS, LLC - DC (4036)CHCHMDBEWMD236——
301-2042Washington Zone 2WirelessNEW CINGULAR WIRELESS PCS, LLC - DC (4036)CHCHMDBEWMD236——
301-2043Washington Zone 2WirelessNEW CINGULAR WIRELESS PCS, LLC - DC (4036)CHCHMDBEWMD236——
301-2044Washington Zone 2WirelessNEW CINGULAR WIRELESS PCS, LLC - DC (4036)CHCHMDBEWMD236——
301-2045Washington Zone 2WirelessNEW CINGULAR WIRELESS PCS, LLC - DC (4036)CHCHMDBEWMD236——
301-2046Washington Zone 2WirelessNEW CINGULAR WIRELESS PCS, LLC - DC (4036)CHCHMDBEWMD236——
301-2047Washington Zone 2WirelessNEW CINGULAR WIRELESS PCS, LLC - DC (4036)CHCHMDBEWMD236——
301-2048Washington Zone 2LandlineVERIZON MARYLAND, INC. (9212)CHEVY CHASE236——
301-2049Washington Zone 2WirelessNEW CINGULAR WIRELESS PCS, LLC - DC (4036)CHCHMDBEWMD236——
301-204AWashington Zone 2WirelessNEW CINGULAR WIRELESS PCS, LLC - DC (4036)CHCHMDBEWMD236——
301-2050Washington Zone 14 (Baltimore LATA)LandlineVERIZON MARYLAND, INC. (9212)MAYO238——
301-2051Washington Zone 14 (Baltimore LATA)Landline or VoIPHD CARRIER LLC (321J)BLTMMDCHXVX238——
301-2052Washington Zone 14 (Baltimore LATA)Landline or VoIPHD CARRIER LLC (321J)BLTMMDCHXVX238——
301-2053Washington Zone 14 (Baltimore LATA)Landline or VoIPHD CARRIER LLC (321J)BLTMMDCHXVX238——
301-2054Washington Zone 14 (Baltimore LATA)Landline or VoIPHD CARRIER LLC (321J)BLTMMDCHXVX238——
301-2055Washington Zone 14 (Baltimore LATA)Landline or VoIPONVOY, LLC - MD (876D)BLTMMDCH42Z238——
301-2056Washington Zone 14 (Baltimore LATA)Landline or VoIPHD CARRIER LLC (321J)BLTMMDCHXVX238——
301-2057Washington Zone 14 (Baltimore LATA)Landline or VoIPHD CARRIER LLC (321J)BLTMMDCHXVX238——
301-2058Washington Zone 14 (Baltimore LATA)Landline or VoIPHD CARRIER LLC (321J)BLTMMDCHXVX238——
301-2059Washington Zone 14 (Baltimore LATA)Landline or VoIPHD CARRIER LLC (321J)BLTMMDCHXVX238——
301-205AWashington Zone 14 (Baltimore LATA)LandlineVERIZON MARYLAND, INC. (9212)MAYO238——
301-206AWashington Zone 13LandlineVERIZON MARYLAND, INC. (9212)LAUREL236——
301-207AWashington Zone 13Landline or VoIPSPOK, INC. (6630)SLSPMDSSX6X236——
301-208AGaithersburgLandlineVERIZON MARYLAND, INC. (9212)GAITHERSBURG236——
301-209AWashington Zone 4LandlineVERIZON MARYLAND, INC. (9212)HYATTSVILLE236——
301-210ALaurelLandlineVERIZON MARYLAND, INC. (9212)MUIRKIRK236——
301-2120Washington Zone 10Landline or VoIPMETROPCS, INC. (5562)BELTSVILLE236——
301-2121Washington Zone 10LandlineVERIZON MARYLAND, INC. (9212)GAITHERSBURG236——
301-2122Washington Zone 10LandlineVERIZON MARYLAND, INC. (9212)GAITHERSBURG236——
301-2123Washington Zone 10LandlineVERIZON MARYLAND, INC. (9212)GAITHERSBURG236——
301-2124Washington Zone 10LandlineVERIZON MARYLAND, INC. (9212)GAITHERSBURG236——
301-2125Washington Zone 10LandlineVERIZON MARYLAND, INC. (9212)GAITHERSBURG236——
301-2126Washington Zone 10LandlineVERIZON MARYLAND, INC. (9212)GAITHERSBURG236——
301-2127Washington Zone 10LandlineVERIZON MARYLAND, INC. (9212)GAITHERSBURG236——
301-2128Washington Zone 10LandlineVERIZON MARYLAND, INC. (9212)GAITHERSBURG236——
301-2129Washington Zone 10LandlineVERIZON MARYLAND, INC. (9212)GAITHERSBURG236——
301-212AWashington Zone 10LandlineVERIZON MARYLAND, INC. (9212)GAITHERSBURG236——
301-2130Washington Zone 3WirelessOMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC (6855)BELTSVILLE236——
301-2131Washington Zone 3WirelessOMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC (6855)BELTSVILLE236——
301-2132Washington Zone 3WirelessOMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC (6855)BELTSVILLE236——
301-2133Washington Zone 3WirelessOMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC (6855)BELTSVILLE236——
301-2134Washington Zone 3WirelessOMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC (6855)BELTSVILLE236——
301-2135Washington Zone 3WirelessOMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC (6855)BELTSVILLE236——
301-2136Washington Zone 3WirelessOMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC (6855)BELTSVILLE236——
301-2137Washington Zone 3WirelessOMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC (6855)BELTSVILLE236——
301-2138Washington Zone 3WirelessOMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC (6855)BELTSVILLE236——
301-2139Washington Zone 3WirelessOMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC (6855)BELTSVILLE236——
301-213AWashington Zone 3WirelessOMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC (6855)BELTSVILLE236——
301-214AWashington Zone 2LandlineVERIZON MARYLAND, INC. (9212)BETHESDA WILDWOOD236——
301-2150Washington Zone 2WirelessCELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD (6395)WASKDCFNAMD236——
301-2151Washington Zone 2WirelessCELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD (6395)WASKDCFNAMD236——
301-2152Washington Zone 2Landline or VoIPNUSO, LLC (551G)CHCHMDBEX4X236——
301-2153Washington Zone 2Landline or VoIPNUSO, LLC (551G)CHCHMDBEX4X236——
301-2154Washington Zone 2LandlineVERIZON MARYLAND, INC. (9212)CHEVY CHASE236——
301-2155Washington Zone 2LandlineVERIZON MARYLAND, INC. (9212)CHEVY CHASE236——
301-2156Washington Zone 2LandlineVERIZON MARYLAND, INC. (9212)CHEVY CHASE236——
301-2157Washington Zone 2LandlineVERIZON MARYLAND, INC. (9212)CHEVY CHASE236——
301-2158Washington Zone 2LandlineVERIZON MARYLAND, INC. (9212)CHEVY CHASE236——
301-2159Washington Zone 2LandlineVERIZON MARYLAND, INC. (9212)CHEVY CHASE236——
301-215AWashington Zone 2LandlineVERIZON MARYLAND, INC. (9212)CHEVY CHASE236——
301-216AGaithersburgLandlineVERIZON MARYLAND, INC. (9212)GAITHERSBURG236——
301-217AWashington Zone 10LandlineVERIZON MARYLAND, INC. (9212)ROCKVILLE 1236——
301-218AWashington Zone 14LandlineVERIZON MARYLAND, INC. (9212)UPPER MARLBORO CHURCH ROAD236——
301-219AWashington Zone 2WirelessNEW CINGULAR WIRELESS PCS, LLC - DC (4036)CHCHMDBEWMD236——
301-2200Washington Zone 13LandlineVERIZON MARYLAND, INC. (9212)COLLEGE PARK236——

Search and page through all 4,740 blocks →

Area Code 301 Numbering Data

Block-level assignments from the North American Numbering Plan administrator, via localcallingguide.com.

Assigned Prefixes

786

Assignment Blocks

4,740

Rate Centers

64

Carriers of Record

41

Line Types

TypeBlocksShare
Landline1,62234%
Landline or VoIP2,03243%
Wireless1,08623%

Carriers of Record

CarrierBlocks
VERIZON MARYLAND, INC.1,622
OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC451
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD263
ONVOY, LLC - MD263
BANDWIDTH.COM CLEC, LLC - MD255
NEW CINGULAR WIRELESS PCS, LLC - DC237
CORE COMMUNICATIONS, INC.- MD233
MCIMETRO ACCESS TRANSMISSION SERVICES LLC221
METROPCS, INC.189
PAETEC ITEL, LLC140
31 other carriers866

Carrier of record for each block. Numbers ported to another carrier keep their original block assignment, so this is not a lookup of who serves a given number today.

Prefixes by Rate Center

Rate CenterPrefixesBlocks
Washington Zone 3112502
Washington Zone 288418
Washington Zone 1353313
Washington Zone 1052332
Washington Zone 448238
Frederick37227
Washington Zone 537167
Gaithersburg33193
Washington Zone 1130140
Waldorf25165
Laurel23133
Washington Zone 623133
Hagerstown22162
Washington Zone 1421151
Washington Zone 121575
Cumberland1494
Lexington Park-Great Mills1160
Washington Zone 14 (Baltimore LATA)1079
Washington Zone 161080
Ashton969
Leonardtown959
Myersville959
Oakland868
Washington Zone 15757
Damascus656
Indian Head666
Laurel (Baltimore LATA)545
Brandywine444
Damascus (Hagerstown LATA)434
Washington Zone 15 (Baltimore LATA)434
Keedysville332
La Plata323
Mechanicsville313
Ashton (Baltimore LATA)222
Brunswick222
Buckeystown211
Clear Spring222
Friendsville222
Frostburg221
Kitzmiller213
Mount Airy222
New Market212
Poolesville222
Walkersville222
Baltimore11
Bittinger111
Emmitsburg111
Flintstone111
Grantsville111
Hancock110
Highfield111
Hughesville111
Lonaconing111
McCoole111
Middletown111
Mount Savage111
Nanjemoy111
Ridge111
Smithsburg111
Thurmont111
Tompkinsville111
Washington Zone 13 (Baltimore LATA)110
Westernport111
Williamsport111

A rate center is the telephone exchange area a number is homed to. It sets local calling boundaries, and is not the caller's current location.

LATAs
236, 238, 240
Incumbent Carrier
VERIZON MARYLAND, INC.

About Area Code 301

Area code 301 is a North American Numbering Plan (NANP) telephone area code assigned to Maryland, United States. It is one of 6 area codes serving Maryland. As population and demand for phone numbers grew, the region was divided into multiple numbering plan areas to avoid exhausting the available 7-digit number pool.

Is 301 a valid area code?

Yes. 301 is an active North American Numbering Plan (NANP) area code, currently assigned to Maryland, United States. It is safe to answer or dial calls using this area code.

Where is area code 301?

Area code 301 covers 50 cities and communities in Maryland, including Ashton, Ashton (Baltimore Lata), Baltimore, Bittinger, Brandywine, and 45 more localities. This is based on telephone company rate center data — the geographic areas carriers use to determine local calling boundaries and to assign numbers when a business or individual requests a phone number in a specific city.

What time zone is area code 301?

All numbers in the 301 area code observe Eastern Time (IANA timezone: America/New_York). Eastern Time is UTC−5 in winter (EST) and UTC−4 in summer (EDT). When placing a call to a 301 number from a different time zone, check the current local time above to avoid calling outside of business hours.

How do I dial a 301 number?

From within Maryland, dial the 7-digit local number directly if calling within the same rate center, or dial 1 + 301 + 7-digit number for long-distance calls within North America. From outside the US or Canada, dial your country's international exit code followed by 1 301 XXX XXXX. The country code for both the United States and Canada in NANP is +1.

Formatting 301 phone numbers

Format 301 numbers using E.164 notation as required by RFC 3966: prefix with +1 and omit dashes and parentheses (e.g., +13015550100). This format ensures tel: links work correctly on all mobile browsers and VoIP apps. See the tel: URI formatting guide for complete examples.

Other Area Codes in Maryland

227240410443667