630 area code
Roselle area, Central Time.Area code 630 covers Roselle, Hinsdale, Naperville and 22 more places in Illinois, on Central Time. 331 covers the same area.
Right now in Roselle
Central Time (CST, UTC-6; CDT, UTC-5 in summer)
Calling hours: Every day, 8 AM to 9 PM (the federal rule)
Small talk
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Where 630 numbers come from
Numbers are issued by rate center, a billing area named for its main town. 630 has 25. Each one's share is how many 630 numbers start there. Its biggest metro area is Chicago-Naperville-Elgin, IL-IN.
- Roselle12%
- Hinsdale11%
- Naperville11%
- Aurora8%
- Downers Grove8%
- Elmhurst7%
- Lombard6%
- Wheaton5%
- Bensenville4%
- Lemont3%
- West Chicago3%
- St. Charles3%
Also: Itasca, Bartlett, Geneva, Glen Ellyn, Batavia, Sugar Grove, Warrenville, Oswego, Big Rock, Yorkville, Elburn, Kaneville + 1 more
Share of exchanges (blocks of 10,000 numbers). Source: NANPA rate center and exchange reports, November 10, 2026
When can you call a 630 number?
Sales calls to homes and cell phones have legal hours, set by the federal rule. Hold every 630 number to them, since you can't tell a work line from a personal cell.
What applies to 630Every 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
630 and 331
630 went into service on August 3, 1996, split off from 708. 630 and 331 cover the same area, so new numbers can get either code and neighbors can have different area codes. 630 holds 75% of the area's exchanges; 331 holds the rest. Local calls take all 10 digits.
- 1996630 starts
- 2007331 overlay
Source: NANPA area code database
Calling a list of 630 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.
630 area code FAQ
What area code is 630?
630 is an Illinois area code for Roselle, Hinsdale, Naperville, Aurora and 21 more places.
What time zone is the 630 area code in?
Central Time (CST, UTC-6; CDT, UTC-5 in summer).
Is 331 the same as 630?
Same area, different code. 630 and 331 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 630 numbers?
Every day, 8 AM to 9 PM, local time, under the federal rule.
When did the 630 area code start?
On August 3, 1996. It was split from 708.
Calling 630 numbers? Reach more of them.
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