631 Area Code
Covers Brentwood and nearby communities in New York.
(631) 555-0142Area code 631 map
Interactive coverage map for area code 631, centered on Brentwood, New York
40.7812, -73.2462
Open in OpenStreetMapArea code 631 coverage map — centered on Brentwood. Shaded area shows the approximate reach around the primary city.
If you are trying to place Brentwood, NY on the map, area code 631 is the one that covers it. It covers communities such as Brentwood, Centereach, Central Islip, Commack and more across New York. The region observes Eastern time, so a number like (631) 555-0142 is on that clock right now. On the ground it spans Suffolk. It shares its territory with the overlay code 934, which sit on the exact same map. Because the 631 region uses more than one area code, you must dial all ten digits — area code included — even for a local call. You do not, however, need to dial a leading 1 for calls within the US and Canada. Keep reading for the current local time in Brentwood, a map of the 631 coverage area, the places it reaches, nearby and overlay codes, and how to tell a real 631 call from a scam.
Cities covered by 631
Cities & neighborhoods
- Brentwood
- Centereach
- Central Islip
- Commack
- Copiague
- Coram
- Deer Park
- Dix Hills
- East Northport
- East Patchogue
- Hauppauge
- Holbrook
- Huntington Station
- Medford
- North Bay Shore
- North Lindenhurst
- Ronkonkoma
- Selden
- Shirley
- Smithtown
- West Babylon
- West Islip
Nearby & overlay area codes
Overlay codes (same area)
These share 631’s geography — a number in either code can be on the same street.
Neighboring codes
Codes for adjacent regions and metros.
Is a call from 631 a scam?
Area code 631 serves Brentwood and the surrounding area, so most calls are ordinary local and business traffic. As everywhere, spam and robocalls do use 631 numbers, frequently by spoofing a local-looking caller ID to boost pickup rates. The area code itself tells you nothing about who is really calling, so judge the call by what's said, not the number.
Red flags to watch for
- Pressure to act right now, or threats of arrest, fines, or service being cut off.
- Requests to pay with gift cards, wire transfer, crypto, or a payment app.
- Asking for passwords, one-time codes, your SSN, or full card/bank numbers.
- A robocall or recording, or a number that won’t let you call back.
When unsure, hang up and call the organization back on a number you look up yourself.
Calling a 631 number from abroad
Every 631 number is a US/Canada +1 number. From a mobile anywhere, the simplest approach is to dial it in international format:
+1 631 555-0142If your phone can’t dial the +, replace it with your country’s exit code, then 1, then the number:
- UK, Germany, France & most of Europe
00 1 631 555-0142 - Australia
0011 1 631 555-0142 - Japan
010 1 631 555-0142 - Mexico
00 1 631 555-0142
Within the US and Canada you don’t need any of this — just dial the ten digits 631 555-0142.
Reverse phone lookup
Check any US or Canada number to see whether it's a working line, which carrier it sits on, whether it's mobile, landline or VoIP, and roughly where it's registered.
Shows carrier, line type and location. Owner name isn't available here.
Results are for personal, informational use only and may not be used for employment, credit, housing or tenant-screening decisions.
Area code 631: frequently asked questions
Where is the 631 area code located?
The 631 area code is located in New York, centered on Brentwood. It covers Suffolk and nearby communities including Brentwood, Centereach, Central Islip, Commack, Copiague, Coram.
What time zone is 631 in?
Area code 631 is in the Eastern time zone (UTC-5 (EST) / UTC-4 (EDT)). You can see the exact current local time for Brentwood on the live clock above.
What cities use area code 631?
Cities and areas that use 631 include Brentwood, Centereach, Central Islip, Commack, Copiague, Coram. Its primary city is Brentwood, NY.
Do I need to dial 1 before 631?
For calls within the US, you do not need to dial a leading 1, but you do need all ten digits: 631 plus the seven-digit number. The 631 area requires ten-digit dialing because more than one area code serves it.
Is 631 a toll-free or scam number?
No — 631 is a normal geographic area code for Brentwood, not a toll-free code (toll-free codes are 800, 833, 844, 855, 866, 877 and 888). A 631 number is not inherently a scam, but the code can be spoofed. See the spam-call section above for how to tell.
What are the overlay area codes for 631?
Area code 631 is overlaid by 934, meaning those codes cover the same geographic area.