Area code 631
Area code 631 serves Riverhead and nearby parts of New York, including Brentwood, Huntington and Smithtown. It is on Eastern Time, which observes daylight saving time. 934 is an overlay for the same area.
Area code 631 at a glance
| State | New York (NY) |
| Main city | Riverhead |
| Time zone | Eastern Time |
| UTC offset | UTC−5 in winter, UTC−4 in summer |
| Daylight saving time | Yes |
| Overlay codes | 934 |
Cities in 631
- Brentwood
- Huntington
- Smithtown
- Brookhaven
An area code shows where a number was first assigned. Mobile numbers keep their area code when people move, so the person you’re calling may be somewhere else.
When you can call a 631 number
Federal telemarketing rules under the TCPA allow sales calls between 8 AM and 9 PM in the called person’s local time. Here is that window for a 631 number, shown in your own time zone.
General information, not legal advice. Some states add rules for Sundays, holidays or the number of calls. See our calling hours guide.
| If you’re on | You can call 631 between |
|---|---|
| Eastern | 8:00 AM to 9:00 PM |
| Central | 7:00 AM to 8:00 PM |
| Mountain | 6:00 AM to 7:00 PM |
| Arizona | 5:00 AM to 6:00 PM |
| Pacific | 5:00 AM to 6:00 PM |
See the time in 631 without leaving your CRM
Parse is a free Chrome extension that shows the local time and weather beside every phone number on the page.
Other area codes in New York
Questions about 631
What time zone is area code 631?
Area code 631 is on Eastern Time. It observes daylight saving time.
Where is area code 631?
Area code 631 is in New York. Its main city is Riverhead, and it also covers Brentwood, Huntington, Smithtown and Brookhaven.
What are the legal hours to call a 631 number?
Under the federal TCPA, sales calls are allowed from 8 AM to 9 PM in the called person’s local time. Personal and informational calls are not limited by these hours.
What area codes overlay 631?
934 covers the same area as 631, so numbers in the same town can have either code.