The 318 area code covers Shreveport, Monroe and 108 more places in Louisiana.
Area code 318 is in Louisiana, on Central Time. In the 318 area, phone numbers are given out most in Caddo Parish, then Ouachita Parish and Rapides Parish. It has been in service since 1957. 457 covers the same area, so two neighbours can have different area codes.
- Where
- 8 counties in Louisiana, mostly Caddo Parish, Ouachita Parish and Rapides Parish
- Time zone
- Central Time
- In service since
- 1957
- Shares its area with
- 457 (since 2025)
- Prefixes in use
- 757
- How to dial
- Local calls need all 10 digits: 318-555-0142.
Find out who called you from a 318 number.
Enter the full 10-digit number to see who it is listed to and the city and state on the listing. It is the same free check as our who called me lookup. To see only the caller ID name on the number, use our free CNAM lookup. To see whether it is a mobile, a landline or a VoIP line, use our free VoIP checker. To see which carrier a (318) number is on today, use our free carrier lookup.
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Shreveport holds 23% of the phone prefixes in area code 318.
A prefix is the three digits after the area code, and NANPA assigns each one to a town. Counting the 757 prefixes in use shows where 318 numbers are actually given out.
- Shreveport172 prefixes, 23%
- Monroe91 prefixes, 12%
- Alexandria60 prefixes, 8%
- Ruston21 prefixes, 3%
- Natchitoches19 prefixes, 3%
- Minden13 prefixes, 2%
- Bastrop12 prefixes, 2%
- Marksville11 prefixes, 1%
Also served: Winnfield, Oakdale, Winnsboro and Rayville and 98 smaller places.
BellSouth (AT&T) holds the most phone number prefixes in area code 318: 201 of 757.
NANPA, which runs the North American numbering plan, assigns each prefix (the three digits after the area code) to one carrier. Here is how the 757 prefixes in use in 318 divide between carriers; holders this page does not name are grouped as other carriers.
| Carrier | Prefixes | Share |
|---|---|---|
| BellSouth (AT&T)AT&T's landline company | 201 | 27% |
| AT&T MobilityMobile network | 110 | 15% |
| Eliska Wireless Ventures Subsidiary I | 42 | 6% |
| Level 3 (Lumen)Lumen's business and wholesale network | 38 | 5% |
| BrightspeedLandline company | 36 | 5% |
| Ton80 Communications | 23 | 3% |
| 41 other carriers | 307 | 41% |
79% of these prefixes are pooled, which means the blocks of 1,000 numbers inside them can belong to other carriers. Any number can also have been moved to another carrier since, so this shows who holds the prefixes, not who serves a given number.
Want the carrier of one exact number? Our free carrier lookup checks it, because numbers move between carriers.
Source: NANPA central office code assignments, October 1, 2026.
318 has been split once and overlaid once since 1957.
1957
318 goes into service.
1999
On October 11, 1999, 337 splits off and takes part of the 318 area.
2025
On September 25, 2025, 457 is added on top of 318, so new numbers here can get either code.
A 318 number on your screen can still be a scam, because caller ID is easy to fake.
- Let an unknown call go to voicemail. A real caller leaves a message; a robocaller usually does not.
- Look the number up with the box above before you call back, because calling back tells a robocaller your line is live.
- Hang up on anyone who wants gift cards, crypto or a wire transfer, or asks you to read out a code that was just texted to you.
- Report unwanted robocalls at reportfraud.ftc.gov, or paste a suspicious message into our free scam checker.
The area codes closest to 318 are 337, 225 and 409.
This list measures the distance between the centres of each area, across state lines, and shows codes that share one area together.
Louisiana has 5 other area codes.
These are the questions people ask most about area code 318.
Where is area code 318?
318 covers Shreveport, Monroe, Alexandria and Ruston and 106 more places in Louisiana. In the 318 area, phone numbers are given out most in Caddo Parish, then Ouachita Parish and Rapides Parish.
What state is area code 318 in?
Louisiana. 318 is a Louisiana area code on Central Time.
What cities use area code 318?
The places holding the most 318 prefixes are Shreveport, Monroe, Alexandria, Ruston, Natchitoches, Minden, Bastrop and Marksville, out of 110 places in all. The count comes from NANPA's prefix assignments as of October 1, 2026.
Which phone company owns area code 318?
No single phone company owns 318. NANPA's records show BellSouth (AT&T) holds the most 318 prefixes, 201 of 757, followed by AT&T Mobility and Eliska Wireless Ventures Subsidiary I. Numbers move between carriers, so check one exact number with a carrier lookup.
What time zone is area code 318 in?
318 is on Central Time.
When did area code 318 start?
318 went into service in 1957.
Is 318 the same area as 457?
Yes. 457 (since 2025) covers the same ground as 318. Nobody's number changed when it was added; new lines simply get whichever code has numbers left, so two neighbours can have different codes.
How do I dial a 318 number?
Local calls need all 10 digits: 318-555-0142.
Is 318 a toll-free number?
No. 318 is a regular area code for Shreveport and Monroe in Louisiana, not a toll-free one. The toll-free codes in North America are 800, 833, 844, 855, 866, 877 and 888.
What area codes are near 318?
The closest are 337 (Lafayette, Louisiana), 225 (Baton Rouge, Louisiana), 409 (Beaumont, Texas) and 601/769 (Jackson, Mississippi), measured between the centres of each area.
Who called me from a 318 number?
Enter the full 10-digit number in the lookup above. It returns the listed owner where there is a public record, where the number is registered, and whether it is a mobile, a landline or a VoIP line.
Is area code 318 a scam?
318 is a real Louisiana area code, so the code itself is not a warning sign. Scam callers fake local-looking numbers on purpose, so judge the call by what the caller asks for, and look the number up before calling back.
Put this lookup on your site: our free area code widget takes two lines of code and shows any US area code's state, time zone and local time.
Source: NANPA, the North American Numbering Plan Administrator: its area code database and prefix assignments, as of October 1, 2026.