National Grid (formerly KeySpan) Phone Number

Phone number and steps below voted #1 of 3 by over 1150 National Grid (formerly KeySpan) customers

800-233-5325

National Grid (formerly KeySpan) phone support
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21 mins average hold time-call 24 hours, 7 daysopen now
#1 of 3 National Grid (formerly KeySpan) phone numbers-#1 overall of 5 ways to contact National Grid (formerly KeySpan)
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