It's always DNS, especially when you're on holiday with nothing but a phone on GPRS

The time a reader found himself in an awful BIND

On Call  Did your phone ring over the New Year? No? Then spare a thought for those unfortunates who remain answerable day or night to the dread trill of a panicked On Call.…

via The Register - Data Centre: Networks
https://go.theregister.co.uk/feed/www.theregister.co.uk/2020/01/03/on_call/