CallataGuides

Area code 318

Where 318 is, how it is dialed, which carriers hold its numbers and how many of its codes are in use, from NANPA's 10/01/2026 files.

State
LA
In service
1957
Assigned codes
764of 800 possible
Carriers
53

About area code 318

318 is one of 6 geographic area codes serving Louisiana; NANPA records its in-service date as January 1, 1957. It is an overlay: 318 and 457 cover the same territory, so neighbors on the same street can have different area codes. It is in the Central time zone. The places with the most assigned exchanges include Shreveport, Monroe, Alexandria, Ruston, and Natchitoches.

Area code 318: NANPA facts
ItemValue
StateLouisiana
In service sinceJanuary 1, 1957
OverlayYes, with 457
Time zoneCentral
Local calls within the codeten digits (area code plus number)
Assigned central office codes764
Rate centers with codes119
Carriers holding codes53
Pooled codes598
Codes assigned since 202097
Relief planning in progressNo

Source: NANPA NPA report and utilized central office code file, both dated 10/01/2026.

Cities and towns in area code 318

318 holds 27% of the 2,874 central office codes assigned in Louisiana, the most of any code in the state. 99 Census places could be matched to rate centers with 318 exchanges; the most populous are Shreveport (177,000), Monroe (46,622), Alexandria (43,133), and Ruston (22,330). For a storefront or service area inside 318, the place pages show which prefixes are rated local there.

Most populous places with 318 exchanges
PlacePopulation (2024)Area codesExchangesCarriers
Shreveport, LA176,57831817236
Monroe, LA46,6223189116
Alexandria, LA43,1333186013
Ruston, LA22,3303182110
Natchitoches, LA17,165318197
Minden, LA11,195318139
Bastrop, LA8,922318126
Oakdale, LA6,49031897
Tallulah, LA5,67731874
Grambling, LA5,27831854
Marksville, LA4,805318116
Winnsboro, LA4,60231886
Haughton, LA4,57431875
Mansfield, LA4,54531876
Springhill, LA4,48531843

Population: Census Vintage 2024 estimates for the matched place. Exchanges and carriers: NANPA utilized code file.

Ten-digit and seven-digit dialing in 318

According to NANPA's dialing-plan data, local calls within 318 are dialed as ten digits (area code plus number) and toll calls as 1 plus ten digits. Ten-digit local dialing means the area code is part of how customers save and recognize your number, so print it in full everywhere. NANPA's dialing-plan note for this code reads: "1+10 digit dialing permissible at service provider’s discretion"

Carriers with 318 numbers

53 carriers hold the 764 central office codes assigned in 318. Bellsouth Telecomm INC d/b/a South Central Bell Tel has the most, with 208 (27%). 598 of the codes (78%) are pooled, meaning the code holder shares blocks of 1,000 numbers with other carriers instead of using all 10,000 itself. Numbers can move between carriers through porting, so a code's holder tells you where the block started, not where every number lives now.

Largest code holders in area code 318
Carrier (NANPA operating company)ExchangesShare
Bellsouth Telecomm INC d/b/a South Central Bell Tel20827%
New Cingular Wireless PCS, LLC - Ga11014%
Cellco Partnership d/b/a Verizon Wireless - La7810%
Onvoy, LLC - La557.2%
Eliska Wireless Ventures Subsidiary I, LLC425.5%
Level 3 Communications, LLC - La354.6%
Brightspeed of Louisiana, LLC344.5%
Ton80 Communications, LLC233.0%
Paetec Itel, LLC182.4%
Bandwidth.com CLEC, LLC - La172.2%
Cp-tel Network Services, INC. - La162.1%
Metropcs, INC.162.1%

Carrier names are the operating company (OCN) names on NANPA's utilized central office code file dated 10/01/2026. A carrier holding a code may port numbers to other carriers.

Local calling areas in 318

NANPA assigns each central office code to a rate center, the local calling area that decides whether a call is local or toll. 318 has codes in 119 rate centers. The table lists the rate centers with the most codes, with the matching Census place where the abbreviation could be matched.

Rate centers in area code 318 by assigned codes
Rate center (NANPA)PlaceCodes
SHREVEPORTShreveport, LA172
MONROEMonroe, LA91
ALEXANDRIAAlexandria, LA60
RUSTONRuston, LA21
NATCHITCHSNatchitoches, LA19
MINDENMinden, LA13
BASTROPBastrop, LA12
MARKSVILLEMarksville, LA11
WINNFIELDWinnfield, LA9
OAKDALEOakdale, LA9
WINNSBOROWinnsboro, LA8
RAYVILLERayville, LA8
MANYMany, LA7
JONESBOROJonesboro, LA7
BENTONBenton, LA7
MANSFIELDMansfield, LA7
BLANCHARDBlanchard, LA7
TALLULAHTallulah, LA7
HAUGHTONHaughton, LA7
XXXXXXXXXXnot matched7
HOMERHomer, LA6
ARCADIAArcadia, LA6
FERRIDAYFerriday, LA6
GRAMBLINGGrambling, LA5
BOYCEBoyce, LA5

Top 25 of 119 rate centers.

How full is area code 318?

An area code has 800 possible central office codes that start with 2 through 9, a few of which are reserved (such as N11 service codes and 555). 764 are assigned in 318, 96% of 800. 97 were assigned in 2020 or later.

Area code 318: central office codes by decade assigned
Decade assignedExchangesShare
2000s19851%
2010s9524%
2020s9725%

Assignment dates as recorded in NANPA's utilized code file; codes without a recorded date are excluded.

Getting a 318 number for your business

For $99 a month, Callata puts a team of up to 5 on one plan ($20 for each person after that): up to 3 local numbers, unlimited inbound calls, a pooled allowance of 1,500 outbound US and Canada minutes per user, browser and cell calling, voicemail transcription with urgency triage, recorded calls with AI summaries and business-hours routing, with E911 on every number.

If you already have a number in area code 318, porting it to Callata is free. Texting from a local number requires a one-time carrier registration (10DLC, $49), and the numbers available in any area code depend on carrier inventory when you choose them.

Optional AI agents (receptionist, sales, support or scheduler) can answer calls after hours or when nobody picks up, take messages, text, email and transfer to your team. They are billed from prepaid AI minutes at $0.25 per minute, identify themselves as AI, and may only place outbound calls to people who consented, between 8am and 9pm.

Frequently asked questions

Where is area code 318?

318 is a geographic area code in Louisiana. Places with the most assigned exchanges include Shreveport, Monroe, Alexandria, and Ruston.

What time zone is area code 318 in?

NANPA lists 318 in the Central time zone.

When did area code 318 go into service?

NANPA records an in-service date of January 1, 1957.

Is 318 an overlay area code?

Yes. It shares its territory with 457.

Can my business get a 318 phone number?

Callata includes up to 3 local numbers on its $99/month plan (5 users included). Which 318 numbers are open depends on carrier inventory when you choose, and you can port an existing number for free.