Network & Infrastructure
Subnet calculators, DNS lookups, IP tools, and other network utilities.
Subnet/CIDR Calculator
Calculate network address, broadcast address, usable hosts and more from any IP/CIDR input.
DNS Lookup
Query A, AAAA, MX, TXT, CNAME, NS, SOA, and PTR records for any domain.
HTTP Headers Checker
Inspect any URL's response headers and analyse security header configuration.
SSL Certificate Checker
Check SSL certificate expiry, issuer, SANs, and validity for any domain.
IP Address Converter
Convert between decimal, binary, hex, and integer IP address formats.
CIDR Range Visualiser
Visualise IP ranges and see overlap between CIDR blocks.
VLAN CalculatorComing Soon
Plan VLAN subnetting and calculate usable address ranges.
Bandwidth CalculatorComing Soon
Convert between bandwidth units and estimate transfer times.
Port ReferenceComing Soon
Quick reference for common TCP/UDP ports and their services.