NET Tools

Octet 1

Octet 2

Octet 3

Octet 4

Network Mask

CIDR

Netmask

Usable Count

CIDR Base IP

First Usable IP

Last Usable IP

Broadcast IP

Usable Range

DNS Resolver

DNS Name

Record Type

Enter a DNS name and choose Resolve.

TCP Port Checker

Host

TCP Port

Enter a host and TCP port to check.

ASN Resolver

Host or IPv4

Enter a hostname or public IPv4 address to resolve ASN details.

Whois / Domain Info

Domain or IPv4

Enter a domain or IPv4 address to retrieve Whois data.

DNS Host Records

Domain

Enter a domain to find common hostnames and DNS records.

IP Info

Host or IPv4

Enter a hostname or IPv4 address to inspect network details.

Email Checker

Email Address

Checks syntax, MX records, and mailbox deliverability through ZeroBounce. The address is sent to ZeroBounce for verification but is not stored by this site. Catch-all and anti-enumeration mail servers may still return an inconclusive result.

Enter an email address to check its mail server.

Email Header Analyzer

Raw Email Header

Paste a raw email header to extract sender, routing, authentication, and originating IP details.