Energy Supplier Information

Electric Supplier Information

Choose a region for information pertinent to suppliers participating in the state's deregulated market.

Gas Supplier Information

Helpful tools and information for operating within our Connecticut or Massachusetts natural gas systems.

Eastern Massachusetts - NSTAR

Eversource Gas of Massachusetts

Wholesale Supply Information

Information to potential wholesale electric suppliers of Standard Service and Supplier of Last Resort Service.

Information relevant to any active Energy Procurement process in Eastern Massachusetts.

Information relevant to any active Energy Procurement process in Western Massachusetts.

Information relevant to any active Energy Procurement process in New Hampshire.

Other Energy Supplier Information

Soliciting offers to supply Renewable Energy Credits.

Soliciting Offers to Supply CES-E Certificates

Service Area

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Service Type

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Help With ZIP Codes

To provide you with the best experience possible and ensure we are presenting the correct information to you, our website requires customers enter a ZIP code for their service address.

Example ZIP codes from across our service territory are provided below. You can also visit the U.S. Postal Service's website to look-up a specific ZIP code.

Connecticut – Electric & Gas: 06901
Connecticut – Electric Only: 06101
Connecticut – Gas Only: 06859
New Hampshire – Electric: 03101
Eastern Massachusetts – Electric & Gas: 02090
Eastern Massachusetts – Electric Only: 02115
Eastern Massachusetts – Gas Only: 01603
Western Massachusetts – Electric: 01101

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