318 area code
Shreveport area, Central Time.Area code 318 covers Shreveport, Monroe, Alexandria and 115 more places in Louisiana, on Central Time. 457 covers the same area.
Right now in Shreveport
Central Time (CST, UTC-6; CDT, UTC-5 in summer)
Calling hours: Mon to Sat, 8 AM to 8 PM · Sun, no calls (Louisiana law)
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Where 318 numbers come from
Numbers are issued by rate center, a billing area named for its main town. 318 has 118. Each one's share is how many 318 numbers start there.
- Shreveport23%
- Monroe12%
- Alexandria8%
- Ruston3%
- Natchitoches3%
Also: Minden, Bastrop, Marksville, Oakdale, Winnfield, Rayville, Winnsboro, Blanchard, Haughton, Jonesboro, Mansfield, Many + 101 more
Share of exchanges (blocks of 10,000 numbers). Source: NANPA rate center and exchange reports, November 10, 2026
When can you call a 318 number?
Sales calls to homes and cell phones have legal hours, set by Louisiana law. Hold every 318 number to them, since you can't tell a work line from a personal cell.
What applies to 318Mon to Sat, 8 AM to 8 PM · Sun, no calls
- Federal (TCPA and FTC rule)Every day, 8 AM to 9 PMCalls to residential and mobile numbers. Most calls to businesses are exempt from the FTC's rule.47 CFR 64.1200(c)(1); 16 CFR 310.4(c) (opens in a new tab)
- Louisiana lawMon to Sat, 8 AM to 8 PM · Sun, no callsNo calls on legal holidays either, which the tool doesn't track.LPSC General Order R-35852 (Mar. 10, 2021), §V(A)(2) (opens in a new tab)
Local time comes from the area code, not from where the person is today. Mobiles keep their number when they move. Calling hours here are a guide, not legal advice. Every state's calling hours, with sources
318 and 457
318 went into service on January 1, 1957, and 337 was later split off from it. 318 and 457 cover the same area, so new numbers can get either code and neighbors can have different area codes. 318 holds 100% of the area's exchanges; 457 holds the rest. Local calls take all 10 digits.
- 1957318 starts
- 1999337 split off
- 2025457 overlay
Source: NANPA area code database
Other Louisiana area codes
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318 area code FAQ
What area code is 318?
318 is a Louisiana area code for Shreveport, Monroe, Alexandria, Ruston and 114 more places.
What time zone is the 318 area code in?
Central Time (CST, UTC-6; CDT, UTC-5 in summer).
Is 457 the same as 318?
Same area, different code. 318 and 457 cover the same area (an overlay), so new numbers can get any of them and local calls take all 10 digits.
What are the calling hours for 318 numbers?
Mon to Sat, 8 AM to 8 PM · Sun, no calls, local time, under Louisiana law.
When did the 318 area code start?
On January 1, 1957.
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