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Network Toolbox

Free diagnostic tools for network and telecoms professionals

Tool

🔌

Connection Analysis

Auto

Your IP address, ISP, location, browser, screen, device and connection details

🔎

Whois Lookup

Server

Domain registration details, registrar, name servers and expiry dates

🌐

DNS Lookup

Client

Query A, AAAA, CNAME, NS and TXT records via DNS-over-HTTPS

MX Record Checker

Client

Mail server records, priorities and mail provider detection

Ping / Latency Test

Server

TCP connection latency to any host. Three attempts with average

🔒

Port Scanner

Server

Scan common ports (HTTP, HTTPS, SSH, FTP, SMTP, DNS and more)

🔒

SSL Certificate Checker

Server

Certificate issuer, expiry, SANs, protocol version and chain details

📄

HTTP Header Inspector

Server

Response headers, security headers, server info and caching policies

🔢

Subnet Calculator

Client

Network address, broadcast, host range, wildcard mask from IP/CIDR

Speed Test Lite

Client

Quick download speed estimate using server-hosted test files