ustanet.usta.edu.co. 30 IN A 104.18.31.98 ustanet.usta.edu.co. 30 IN A 104.18.30.98 ustanet.usta.edu.co. 30 IN AAAA 2606:4700::6812:1f62 ustanet.usta.edu.co. 30 IN AAAA 2606:4700::6812:1e62