About National Grid Keyspan
National Grid operates widely in New York, Pennsylvania, Rhode Island, Massachusetts, New Hampshire, and Connecticut. The utility serves more than 20 million customers across all its service areas and largely in New York City.
Keyspan and National Grid were once separate companies, but as of 2007, they’ve become one, with the National Grid Keyspan operation focusing on the metro New York area. National Grid is one of the largest investor-owned energy companies in the US and started in 1990 in London before coming to the US. National Grid can provide both electricity and natural gas to its customers, though New Yorkers primarily rely on it for gas.