Hours of Operation
STN is available 24 hours a day, 7 days a week, with the exception of a maintenance downtime windows. Downtimes generally occur monthly, and will be announced in advance.
CAS IP Finder powered by STN™, will be unavailable on :
- Saturday, April 11, 2026 from 5:00 PM until 1:00 AM Sunday (U.S. Eastern Time)
- Saturday, May 9, 2026 from 5:00 PM until 1:00 AM Sunday (U.S. Eastern Time)
- Saturday, June 6, 2026 from 5:00 PM until 1:00 AM Sunday (U.S. Eastern Time)
- Saturday, July 4, 2026 from 5:00 PM until 1:00 AM Sunday (U.S. Eastern Time)
- Saturday, August 1, 2026 from 5:00 PM until 1:00 AM Sunday (U.S. Eastern Time)
- Saturday, August 29, 2026 from 5:00 PM until 1:00 AM Sunday (U.S. Eastern Time)
- Saturday, October 3, 2026 from 5:00 PM until 1:00 AM Sunday (U.S. Eastern Time)
- Sunday, November 1, 2026 from 2:00 AM (U.S. Eastern Time) until 3:00 AM Sunday (U.S. switch to Standard Time, 2 hours actual)
- Saturday, November 7, 2026 from 5:00 PM until 1:00 AM Sunday (U.S. Eastern Time)
- Saturday, December 5, 2026 from 5:00 PM until 1:00 AM Sunday (U.S. Eastern Time)
CAS Customer Service
Hours: Monday 9:00 a.m. - Friday 12:00 a.m. EST (midnight)
Email: help@cas.org
Phone: 1 800.753.4227 (North America), +1 614.447.3731 (if calling outside the United States)