NiSource email format
NiSource mostly uses first@nisource.com, for example jane@nisource.com. That's 33% of the 3 people we've seen there, 3 of them with verified addresses. NiSource uses more than one format, so try the others below too.
- first@nisource.come.g. jane@nisource.com33%
- first.last@nisource.come.g. jane.doe@nisource.com33%
- flast@nisource.come.g. jdoe@nisource.com33%
Examples use the made-up name Jane Doe. Verified addresses count three times as much as unverified ones.
About NiSource
Welcome to NiSource. We serve nearly four million natural gas and electric customers across six states under our NiSource, NIPSCO and Columbia Gas brands.
- Industry
- Public utility
- Headquarters
- Merrillville
- Founded
- 1912
- Website
- nisource.com
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Where this comes from
We note which format a work address follows when we see it alongside the person's name; the address and name themselves aren't kept. Formats change, and some people have addresses that don't follow the company format, so treat this as the likeliest format, not a guarantee. Last updated October 2026.
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