Nisource Telephone Number

Nisource telephone number is 219-647-5990, located at 801 East 86Th Avenue, Merrillville, Indiana 46410-6271. Nisource is a leading company in its field and considered to be one of the bigger companies in Merrillville, Indiana and nationwide.

What is Nisource Telephone Number?

Nisource telephone number to connect to the corporate office, management team, different departments and customer service is 219-647-5990

Who is calling me from telephone number 219-647-5990?

If you are getting calls from telephone number 219-647-5990, you are getting a call from a someone from Nisource company.

Nisource Telephone Number Calling Hours

We found that the best calling hours using this Nisource Telephone Number and speak to a real person at Nisource are between 9:00 AM and 2:30 PM.

Nisource telephone number is 219-647-5990, this is the best telephone number for the Nisource where you will be answered fast, and reach out Nisource management team and divisions, including Nisource CEO, human resources department, legal, Nisource, customer service and support, Nisource accounting & pay your bill, logistics & shipping, sales & marketing, and all other Nisource departments.

If you find that you need additional assistance with Nisource Telephone Number and Nisource corporation, our international team is ready to assist you, at no cost – we will do all the leg work getting the information you need and share it with you and the rest of the users. Please send us a message with the details of your inquiry.

Nisource headquarters & corporate office phone number that is provided on this page is free. Please note that you may be charged by your mobile phone company according to the phone contract you have with them. This Nisource headquarters & corporate office phone number will connect you with a real person to assist you.

Nisource Mailing Address

What is Nisource mailing address?

Nisource official mailing address is 801 East 86Th Avenue, Merrillville, Indiana 46410-6271.

801 East 86Th Avenue
IN 46410-6271
United States
Nisource Website:

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