UI Company Customer Service Phone Number

Phone Number of UI Company is +1 203-499-2000 .
United Illuminating Company is one of the largest providers of electric utility services in the United States. The name was given as United Illuminating Company in the year of 1899. It is a New Haven-based regional electric distribution company that is wholly owned subsidiary of UIL Holdings Corporation. The company is engaged with purchase, distribution, transmission and sale of electricity.


The United Illuminating Company is specialized in retail and commercial Energy and home efficiency products and services that are the most significant companies in the United States. The company provides energy to more than 325,000 customers across the world. It is the fast growing company that serves in more than 17 towns and cities. The company serves commercial, residential and industrial customers in the Bridgeport and Greater New Haven. It has near about 324,000 customers in the world.

Transmission Business

UI's transmission business unit was established in the year of 2006 that achieve growth through pursuing, capturing and identifying transmission opportunities to enhance the reliability and market efficiency.

Headquarter and customer service

The head office of the company is located in Orange, Connecticut in the United States of America. The company traded on the New York Exchange under the symbol UIL. There are more than five thousand employees working in the United Illuminating Company. The customer service are available from Monday to Friday: 9:00 am to 5:30 pm.

UI Company Address

The address of UI Company is 157 Church St #16, New Haven, Connecticut, 06510, United States.

UI Company Website

The Website of UI Company is www.uinet.com.

UI Company Customer Support Service Phone Number

The customer support phone number of UI Company is +1 203-499-2000 (Click phone number to call).


The postal and official address, email address and phone number (helpline) of UI Company Service Center and UI Company customer service phone number is given below. The helpline of UI Company customer service phone number may or may not be toll free.

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