Network Tools
CIDR subnet calculations, DNS over HTTPS, and network references. Every tool runs 100% locally in your browser so your data never leaves your device.
Network Tools
Subnet / CIDR Calculator
Calculate network addresses, broadcast IPs, netmasks, and usable host ranges from CIDR notation.
IP Range Calculator
Convert between start/end IP address ranges and minimal matching CIDR network blocks.
Number Base Converter
Convert numbers across Binary, Octal, Decimal, Hexadecimal, and arbitrary bases (2 to 36).
Bandwidth & Transfer Calculator
Calculate download and upload transfer times based on file size and internet connection speed.
MAC Address Converter
Format MAC addresses across standard notations (colon, hyphen, dot) and identify vendor OUI.
Port Number Reference
Searchable directory of standard TCP and UDP port numbers, protocols, and service names.
WHOIS / Domain Details
Look up domain registrar, creation date, expiration countdown, and authoritative nameservers.
Name Server Checker
Verify delegating authoritative nameservers and global DNS delegation for any domain name.
DNS Lookup
Query and inspect DNS records (A, AAAA, MX, TXT, NS, CNAME, SOA, CAA) via DNS over HTTPS.
What Is My IP?
Discover your public IPv4 and IPv6 addresses, internet service provider, and location details.
