$TTL 300
@ IN SOA ns root (
- 2018121801 ; Serial
+ 2019030602 ; Serial
4h ; slave refresh
15m ; slave retry time in case of a problem
4w ; slave expiration time
masada IN A 18.102.208.16
olinda IN A 18.102.208.15
novgorod IN CNAME novgorod.mit.edu.
+soviet-russia IN A 76.119.235.30
tikal IN A 192.168.1.27
; Most services
mail IN A 18.102.208.15
+mail2 IN CNAME adehnert3.xvm.mit.edu.
+mail-pi IN CNAME soviet-russia
imap IN CNAME olinda
*.imap IN CNAME olinda
smtp IN A 18.102.208.15