In a BIND zone file, what does the @ character indicate?

 In a BIND zone file, the @ character indicates the name of the zone as defined in the zone statement in named.conf. This is also known as the current origin of the zone file. The @ character is a shortcut that allows the zone file to refer to the zone name without typing it fully. For example, if the zone name is example.com, then the @ character can be used instead of example.com. in the zone file. This can save space and avoid typos123 References:

LPIC-2 Overview

LPIC-2 202-450

What’s the meaning of ‘@’ in a DNS zone file? - Server Fault