• Apollo NetSpeed
• All NetTools
• validator.w3.org MarkUp Validation Service

Names and Numbers (ICANN)

• ICANN - Internet Corporation For Assigned Names and Numbers
• IANA Internet Assigned Numbers Authority
• INTERNET PROTOCOL V4 ADDRESS SPACE
• RIPE NCC - Regional Internet Registry in Europe, the Middle East and parts of Central Asia.
• Latvijas IP adrešu saraksts
• RFC 3330 - Special-Use IPv4 Addresses
• INTERNET MULTICAST ADDRESSES 224.0.0.0 through 239.255.255.255
• Root-Zone Whois Information
• ICANN-Accredited Registrars
• Fiducija LLC ir ICANN akreditētais reģistrators.