| MAC Hersteller Adressen | https://www.heise.de/netze/tools/mac/ |
| IANA Internet Assigned Numbers Authority | http://www.iana.org/ |
| Internet FAQ Archives | http://www.faqs.org/ |
| Internet FAQ Archives TCP-IP | http://www.faqs.org/faqs/internet/tcp-ip/tcp-ip-faq/part1/ |
| TCP - UDP Portnumbers at IANA.ORG | http://www.iana.org/assignments/port-numbers |
| IP Geo-Location | https://ipinfo.io/ |
| IP Location Map | https://iplocation.com/ |
| Have i been "pwned" | https://haveibeenpwned.com/ Breach-Kontrolle |