According to our records, this business is located at 939 N Long Ave. in Chicago (in Cook County), Illinois 60651, the location GPS coordinates are: 41.897923 (latitude), -87.76035 (longitude). A-1 Interstate Alarm Service is categorized under Antennas, Receiving, Satellite Dishes (SIC code 5063). Current estimates show that the unit has a sales volume of $3,948,000 and staff of approximately 6 people. You can contact the company by phone at (773) 626-2600.