IPV4 Subnet Mask Sheet
.
.
AddressesNetmaskAmount of a Class C
/31
2
255.255.255.254
1/128
/30
4...
Recommended DNS TTL values
When specifying TTL (Time To Live) values in DNS records, please be aware of the following...
Come aggiungere un record MX
Per aggiungere un record MX ad un dominio che utilizzi il servizio DNS di DomainRegister:...
DNS History Tools
A complete and comprehensive service to recover DNS history data for a certain domain does not...
DNS Check Tools
These check tools are:
online (so are always ready to run in seconds, and you don't need to...
