Prefix Lookup

ASN, provider and announcement status for any IP subnet

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What is an IP Prefix?

An IP prefix (or subnet) is a range of IP addresses allocated to an organisation or provider. It is expressed in CIDR notation, e.g. 2.84.0.0/14, where /14 indicates the network size.

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IP & Location

IP Ranges by Country - List of IP subnets and ASNs for any country.
IP Calculator - Calculate subnet, CIDR and network address ranges.

DNS

DNS Lookup - Search DNS records for any domain.
DNS Propagation - Check DNS propagation worldwide.
DNS Leak Test - Check if your VPN leaks DNS queries.

Privacy

VPN & Proxy Check - Check if you are using a VPN or proxy.
WebRTC Leak Test - Check if your browser reveals your real IP.
Blacklist Check - Check if your IP is on any blacklist.

Domain

WHOIS Lookup - Domain registration information.
SSL Checker - Check the SSL certificate of any domain.
Redirect Checker - Detect and analyze URL redirects.

Network

Port Scanner - Scan open ports on any host.

General Tools

Password Generator - Generate strong and secure passwords.