NSTAR Customer Service Number

Eversource, formerly NStar Electric,  is a leading energy supplier serving customers’ needs across Connecticut, Massachusetts, and New Hampshire. As a committed national grid public utilities partner in building a sustainable future, Eversource offers many services to support residential customers. From easy access to account management and bill payment options to comprehensive outage reporting and restoration services, Eversource is focused on delivering reliable energy solutions in the United States. 

NSTAR Customer Service Number

For residential customers seeking assistance with their utility services in Massachusetts, Connecticut, and New Hampshire, Eversource provides a comprehensive support system. Whether you’re facing an emergency, need help with bill payments, manage your account, report outages, move services, file a claim, or avoid scams, Eversource has streamlined channels to cater to your needs effectively.

For Connecticut Residents: 

NSTAR Customer Service Number, Electricity: 800-286-2000

NSTAR Customer Service Number, Natural Gas: 800-989-0900

• Electrical Power Outage: 800-286-2000
• Natural Gas Leakage: 877-944-5325
• Credit and Collections: 800-286-2828
• Tree Trimming: 844-275-3302
• Credit and Collections: 800-438-2278
• Pay by Phone for all customers: 888-783-6618

For Massachusetts Residents:

NSTAR Customer Service Number: 800-592-2000 

• Power Outage: 800-592-2000
• Smell Gas: 800-592-2000
• Electric Credit and Collections: 866-861-6225
• Gas Credit and Collections: 866-861-6225

For New Hampshire Residents:

NSTAR Customer Service Number: 800-662-7764

• Power Outages: 800-662-7764
• Credit and Collections: 844-273-7760
• Claims: 844-685-4475 

NSTAR Email/Contact Form

For those who prefer digital communication or need to send detailed inquiries, Eversource offers a convenient email/contact form option. This online service allows residential customers to reach out directly from the comfort of their homes or on the go. Whether you have questions about your service, need assistance with your utility bill, or want to report specific issues, the email/contact form provides a direct line to Eversource’s customer support team.

Eversource / NSTAR Contact Us Form: https://www.eversource.com/content/residential/contact-us

Here, you’ll find a segmented approach based on your needs, including account management, billing inquiries, service requests, and more. Select the category that best fits your issue to ensure it’s directed to the appropriate operating company department.

When filling out the contact form, be ready with your account number and any relevant details about your request or concern. This information will help Eversource’s customer service representatives understand your situation better and provide a more accurate and timely response.

NSTAR Mailing Address

Here are the Mailing Address details:

For New Hampshire:

Eversource / NSTAR Bill Payments Mailing Address:

Eversource
PO Box 56003
Boston, MA 02205-6003:

Eversource / NSTAR General Correspondence Mailing Address:

Eversource
P.O. Box 330
Manchester, NH 03105-0330

For Connecticut:

Eversource / NSTAR Electric Bill Payments Mailing Address:

Eversource
P.O. Box 56002
Boston, MA 02205-6002

Eversource / NSTAR Gas Bill Payments Mailing Address:

Eversource
P.O. Box 56004
Boston, MA 02205-6004

Eversource / NSTAR General Correspondence Mailing Address:

Eversource
107 Selden Street,
Berlin, CT 06037

For Massachusetts:

Eversource / NSTAR Electric Bill Payments Mailing Address:

Eversource
P.O. Box 56007
Boston, MA 02205-6007

Eversource / NSTAR Gas Bill Payments Mailing Address:

Eversource
P.O. Box 56007
Boston, MA 02205-6007

Eversource / NSTAR General Correspondence Mailing Address:

Eversource
247 Station Drive,
Westwood, MA 02090

NSTAR Support Website

Eversource’s online support portal offers a comprehensive resource for customers seeking assistance with their energy services. This digital platform is designed to provide immediate access to a wide range of support options, account management tools, and information on energy usage and savings.

Eversource / NSTAR Outages and Storms: https://www.eversource.com/content/residential/outages

Eversource / NSTAR Account and Billing: https://www.eversource.com/content/residential/account-billing

Easily view and manage your account details, billing history, and payment options all in one place. Access real-time updates on power outages, report an outage, and track the restoration process online. Moreover, discover ways to reduce your retail electricity consumption and lower your bills with tips, tools, and programs tailored to your needs. Whether moving, starting, or stopping service, the support website efficiently facilitates all your service-related requests.

NSTAR Social Media

Send messages to Eversource customer care through Facebook. Customer care reps usually respond within an hour. See photos of NSTAR employees giving back on their Instagram account photos. Subscribe to the NSTAR or Eversource YouTube Channel to learn what is happening with your energy company. Connect with one of the 5,000 NSTAR employees through LinkedIn.

Here are the social media account details: 

• Eversource / NSTAR Facebook: https://www.facebook.com/EversourceMA 
• Eversource / NSTAR  Twitter: https://twitter.com/eversourcema 
• Eversource / NSTAR  LinkedIn: https://www.linkedin.com/company/eversourceenergy
• Eversource / NSTAR  YouTube Channel: https://www.youtube.com/channel/UCpq2zozgxhuM4iafvhVImVg
• Eversource / NSTAR  Instagram: https://www.instagram.com/eversourceenergy/

About NSTAR

Eversource, formerly known as NSTAR, is New England’s premier energy provider, committed to delivering reliable electricity and gas services across Connecticut, Massachusetts, and New Hampshire. Eversource is deeply invested in the regions it serves, focusing on renewable energy solutions, safety, and community support.

NSTAR Headquarters Location Map