618 area code
Collinsville area, Central Time.Area code 618 covers Collinsville, Carbondale, Belleville and 239 more places in Illinois, on Central Time. 730 covers the same area.
Right now in Collinsville
Central Time (CST, UTC-6; CDT, UTC-5 in summer)
Calling hours: Every day, 8 AM to 9 PM (the federal rule)
Small talk
Calling a lot of them? RegieGO dials up to five lines at once. See the dialer
Where 618 numbers come from
Numbers are issued by rate center, a billing area named for its main town. 618 has 242. Each one's share is how many 618 numbers start there. Its biggest metro area is St. Louis, MO-IL.
- Collinsville11%
- Carbondale4%
- Belleville4%
- Centralia3%
- Granite City3%
- Olney2%
Also: Alton, Marion, East Saint Louis, Mount Vernon, Herrin, Edwardsville, Wood River, Benton, O'Fallon, Edgemont, Harrisburg, Metropolis + 224 more
Share of exchanges (blocks of 10,000 numbers). Source: NANPA rate center and exchange reports, November 10, 2026
When can you call a 618 number?
Sales calls to homes and cell phones have legal hours, set by the federal rule. Hold every 618 number to them, since you can't tell a work line from a personal cell.
What applies to 618Every day, 8 AM to 9 PM
- 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)
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
618 and 730
618 is one of the original area codes from 1947. 618 and 730 cover the same area, so new numbers can get either code and neighbors can have different area codes. 618 holds 86% of the area's exchanges; 730 holds the rest. Local calls take all 10 digits.
- 1947618 starts
- 2023730 overlay
Source: NANPA area code database
Calling a list of 618 numbers?
Paste it into the free phone number validator. It checks every number, finds each one's time zone and sorts the list by who you can call right now.
618 area code FAQ
What area code is 618?
618 is an Illinois area code for Collinsville, Carbondale, Belleville, Centralia and 238 more places.
What time zone is the 618 area code in?
Central Time (CST, UTC-6; CDT, UTC-5 in summer).
Is 730 the same as 618?
Same area, different code. 618 and 730 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 618 numbers?
Every day, 8 AM to 9 PM, local time, under the federal rule.
When did the 618 area code start?
In 1947: it's one of the original area codes.
Calling 618 numbers? Reach more of them.
RegieGO researches every account and dials up to five lines at once while you talk. 250 free credits, no credit card.