Area Code 640 Phone Number
for Your Business
Get a local 640 number for your business in Trenton, NJ. Cloud VoIP with SMS, an auto attendant (IVR), and more — starting at $30/ext/mo. No contracts.
What Is Area Code 640?
Area code 640 is a North American telephone area code serving Trenton, New Jersey. It has been in service since September 17, 2018 and operates on Eastern Time. It is part of the 609/640 overlay complex. Businesses operating in the 640 area code region use local numbers to build trust with customers, improve answer rates, and establish a professional local presence.
With Zonitel, you can get a new 640 area code number or port your existing one with guided onboarding — no hardware required. Your team can make and receive calls from any device using the Zonitel mobile app or web portal.
Area Code 640 at a Glance
- Region
- South Jersey (overlay), New Jersey
- In service
- Since September 17, 2018
- Time zone
- Eastern Time
- Overlay
- Shares its territory with 609; local calls use 10-digit dialing
- History
- Added on September 17, 2018 as an overlay of 609
- Telemarketing hours
- 8 a.m.–9 p.m. Eastern Time for residential numbers (TCPA, 47 CFR 64.1200(c)(1))
Why Your Business Needs a 640 Local Number
A local number tells customers you're part of the community. People in Trenton are more likely to pick up a call from a 640 number they recognize than from an unfamiliar out-of-area number.
Everything Included With Your 640 Number
Zonitel is not just a phone number — it's a complete cloud business phone system. Every plan includes:
Frequently Asked Questions About Area Code 640
What cities use area code 640?
Area code 640 serves the South Jersey (overlay) area of New Jersey. Cities in the 640 region include Trenton, NJ.
Is area code 640 an overlay?
Yes. 640 is part of the 609/640 overlay, so new numbers in this region can come from any of those area codes, and local calls require 10-digit dialing.
What time zone is area code 640 in?
Area code 640 is in Eastern Time. Telemarketing calls to residential 640 numbers are limited to 8 a.m.–9 p.m. Eastern Time under the TCPA (47 CFR 64.1200(c)(1)).
Can I get a 640 number for my business without moving there?
Yes. With Zonitel's cloud VoIP, you can get a 640 area code number regardless of where your business is physically located. This lets you establish a local presence in Trenton without a physical office.
Can I keep my existing 640 number and switch to Zonitel?
Yes. Number porting is free. Porting commonly takes 5–10 business days depending on your current carrier, and your old service stays active until the coordinated cutover.
How much does a 640 business phone number cost?
Zonitel plans start at $30/extension/month plus tax, with no setup fees and no contracts. Your 640 local number is included in the plan.
Get Your 640 Area Code Number Today
30-day free trial. No annual contract required. Guided onboarding.