TIL: SOA Refresh Value#
[mxtoolbox.com warns] if DNS SOA TTL is lower than 20 minutes (1200 seconds) or higher than 12 hours (43200 seconds).
Vodafone Internet Down
[mxtoolbox.com warns] if DNS SOA TTL is lower than 20 minutes (1200 seconds) or higher than 12 hours (43200 seconds).