NTP

North America
0.north-america.pool.ntp.org
1.north-america.pool.ntp.org
2.north-america.pool.ntp.org

United States
0.us.pool.ntp.org
1.us.pool.ntp.org
2.us.pool.ntp.org

Canada
0.ca.pool.ntp.org
1.ca.pool.ntp.org