A "Call Before You Dig Ticket Number" is a reference number for underground utility locations as mandated by Public Act Number 87-71 of the Connecticut State Statutes. It is mandatory for some of the permits issued by Public Works Divisions. You may obtain a "Call Before You Dig Ticket Number" by calling 811 between 7 a.m. and 5 p.m., Monday through Friday or visit the Call Before You Dig website.