ADT Security LLC. Share: Security - Secure, Patrol, Products, Systems & Alarms ADT Security LLC. Visit Website Request Info 814 Arion Parkway Suite 220 San Antonio, TX 78216 (210) 744-4932 Facebook Twitter Hours: Home Security and Automation technology that?s always at your service. About Map About 24/7 MonitoringADT professionals take care of you 24 hours a day, 365 days a year. We provide peace of mind to our customers. What's Nearby? Distance: 5 10 15 20 25 50 mi.