Nstar headquarters details
- Street address
- 800 Boylston St 3rd Fl
- City
- Boston
- State / region
- Massachusetts
- ZIP / postal code
- 02199-8108
- Country
- United States
- Phone
- +1 781 564 9919
- Founded
- 1999
- Website
- nstar.com
- linkedin.com/company/nstar
Location map
Open in Google MapsAll Nstar office locations
| City | State / region | Country | Type |
|---|---|---|---|
| Boston HQ | Massachusetts | United States | Headquarters |
Showing the headquarters of 30 recorded locations. See every location in GraphIQ →
About Nstar
Nstar is headquartered in Boston, Massachusetts, United States. Founded in 1999, the company has 30 recorded locations across 7+ countries and employs approximately 3,000 people worldwide.
Where is Nstar's main office?
Nstar's main headquarters office is located at 800 Boylston St 3rd Fl, Boston, Massachusetts 02199-8108, United States. This is the company's primary corporate address.
Nstar regional offices
Beyond its headquarters in Boston, Nstar has recorded locations in United States, Canada, Indonesia, Norway, Saudi Arabia, Singapore and United Kingdom.
Nstar contact information
The main switchboard for Nstar headquarters can be reached at +1 781 564 9919. Official website: nstar.com.
What does Nstar do?
NSTAR was a utility company that provided retail electricity and natural gas to 1.4 million customers in eastern and central Massachusetts, including the Boston urban area. NSTAR became a subsidiary of Northeast Utilities in April 2012. In February 2015, Northeast Utilities and all of its operating companies (Western Massachusetts Electric, Public Service New Hampshire, Connecticut Light and Power, Yankee Gas, and NSTAR Gas and Electric) became one large company known as Eversource Energy.
Frequently asked questions
Where is Nstar headquarters?
Nstar's headquarters is located at 800 Boylston St 3rd Fl, Boston, Massachusetts 02199-8108, United States.
How many offices does Nstar have?
GraphIQ records 30 locations for Nstar across 7+ countries, as of October 2026.
What is Nstar's corporate address?
The corporate headquarters address is 800 Boylston St 3rd Fl, Boston, Massachusetts 02199-8108, United States.
When was Nstar founded?
Nstar was founded in 1999 and employs approximately 3,000 people.
What is Nstar's phone number?
The main phone number for Nstar headquarters is +1 781 564 9919.
How many employees does Nstar have?
Nstar has approximately 3,000 employees (GraphIQ estimate, 2026).