Underground Damage Prevention Service of North Carolina. This social media account is not monitored 24/7. Contact 811 directly for assistance. Contact 811. The fast and easy way to have your underground lines marked for FREE. Please note: This social media account is not monitored 24/7. Contact 811 directly for assistance. TO PROVIDE AN EFFICIENT, AFFORDABLE COMMUNICATION NETWORK SERVICE OF THE HIGHEST INDUSTRY STANDARDS TO CONTRACTORS, UTILITIES, AND THE GENERAL PUBLIC FOR THE PURPOSE OF REQUESTING LOCATION OF BURIED UTILITIES PRIOR TO EXCAVATION ACTIVITIES IN THE INTEREST OF PROMOTING JOB SAFETY AND DAMAGE PREVENTION.