All the tools you need.
Modern network diagnostics for developers.
DNS Lookup
Perform advanced DNS lookups using dig.
MX Lookup
Find Mail Exchange records for a domain.
Port Scanner
Check common ports for a specific host.
WHOIS Lookup
Retrieve registration details for domains.
Reverse IP
Find hostname associated with an IP address.
Subnet Calculator
Calculate ranges and masks from CIDR.
What Is My IP?
Your current public IP address.