Hours Of Operations Comcast Service Center New Hampshire Comcast Service Center Hours of Operation and Locations in New Hampshire 4.5 - 19 votes 1 Locations in New Hampshire www.customer.xfinity.com Comcast Service Center Hours Category: Electronics Comcast Service Center - Portsmouth, NH 03801 180 Greenleaf Ave(800) 266-2278 View Store Details Recommend For You Xfinity Store A & A Computers Computer Renaissance Computer Tutor Mercury Systems Incorporated Apex Computer Store Jack Henry & Associates Incorporated Imaginit Technologies Computer Man Sea Change International