Area codes / New Jersey / 856
The 856 area code
856 is an area code in New Jersey, in the Eastern time zone. Get a local 856 number for your business, shared by everyone who answers it, or bring the 856 number you already have.
856 at a glance
- State
- New Jersey
- Time zone
- Eastern
- In service since
- 1999
- Overlay
- None: the only code for its area
- Local calls
- Dialed with all ten digits (area code and number)
Get a 856 business number
When you sign up for Onyx Phone, you pick a local number by area code: search 856, narrow it by the next three digits or the last four if you want something memorable, and it's yours on the spot. Which numbers are free changes daily.
The number rings everyone you assign to it, in the browser, on the iPhone and Android apps, and on desk phones, and texts from it are unlimited once US carriers approve your business. Your plan includes one number for each user, and more numbers are $5 a month.
Calling 856 customers
Local calls in 856 are dialed with all ten digits: the area code, then the number. Callers are on Eastern time, so set your business hours to match if most of your customers are here.
Calls from Onyx Phone show your business number, and once your business is verified, your caller ID name too, so 856 customers see who's calling.
Questions about area code 856
What state is area code 856?
Area code 856 is in New Jersey.
What time zone is area code 856 in?
Area code 856 is in the Eastern time zone.
Is 856 an overlay area code?
No. Today 856 is the only area code for its part of New Jersey.
Can I get a 856 business number?
Onyx Phone sells US local numbers. When you pick your number, search the 856 area code; which numbers are free changes daily.
Can I keep the 856 number I already have?
Yes. Moving a number to Onyx Phone is free on every plan and usually takes 3 to 7 business days. You answer on a temporary number until it moves.
Included on every plan
Starter is $17, Business is $29, Scale is $42 per user a month, or less billed yearly. The plan includes a business number for each user and unlimited calling and texting in the US and Canada. Every plan starts with a 7-day free trial, and moving your current number over is free.
Area code data from the North American Numbering Plan Administrator (NANPA), file of October 24, 2026.