DNS & Email Tools

TCP Port Check

Test TCP connectivity and banner responses.

Updated 2025-12-01

Test if a TCP port is open and accepting connections

Host / IP Address

Port

Timeout

21FTP

22SSH

23Telnet

25SMTP

53DNS

80HTTP

110POP3

143IMAP

443HTTPS

465SMTPS

587SMTP Submission

993IMAPS

995POP3S

3306MySQL

3389RDP

5432PostgreSQL

6379Redis

8080HTTP Proxy

27017MongoDB

IP Address Lookup

Locate IP ownership, ASN, and geodata

Blacklist Check

Check IPs or hosts against the major DNSBL/RBL providers

MX Lookup

List MX records for a domain with live diagnostics