If you're here looking up National Grid customer care, you probably already know who they are. But it helps to get an idea of how big they are and what their support operation looks like if you are a customer. National Grid also goes by or is associated with the names NationalGrid, Nationalgrid.com, National Grid plc, National Grid, formerly KeySpan. They are considered to be part of the following sectors and industries: Utilities. National Grid is associated with terms like public, utilities, e-commerce, b2b, b2c, oil & gas by their customers and industry analysts. Their competition, in the eyes of customers, are companies like ConEdison, Dominion, Enbridge. They employ 25,068 people according to customers in the know.