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Dnsmasterclass alternatives & similar sites

DNS Masterclass — 20 years of internet infrastructure, distilled — 18 websites ranked by shared content topics, category and on-page relevance.

Each result shows its full tech stack, contacts and AI-policy — not just a name · Browse all sites in Computer Networking →

Domain	Match	Title	Country/Lang	Category	AI files	Contact	AI-protection
kloth.net ↗	65 match shared topic	KLOTH.NET - about radio and internet, DNS lookup, whois, antispam	en	computer-networking	robotsllmsaihumans	emailphone	none
cisco.com ↗	60 match shared topic	AI Infrastructure, Secure Networking, and Software Solutions - Cisco	en	computer-networking Adobe Experience Manager	robotsllmsaihumans	emailphone	none
cdns.net ↗	60 match shared topic	Commumity DNS - Anycast Leaders	en	computer-networking	robotsllmsaihumans	emailphone	none
dns-oarc.net ↗	60 match shared topic	Home \| DNS-OARC	en	computer-networking Drupal	robotsllmsaihumans	emailphone	none
dnsviz.net ↗	60 match shared topic	DNSViz \| A DNS visualization tool	en	information-and-network-security	robotsllmsaihumans	emailphone	none
internet2.edu ↗	60 match shared topic	Home - Internet2	en	computer-networking WordPress	robotsllmsaihumans	emailphone	none
a10networks.com ↗	60 match shared topic	A10 Networks: Enterprise Security & Infrastructure Solutions	en	information-and-network-security WordPress	robots llmsaihumans	emailphone	none
dnsleaktest.com ↗	60 match shared topic	DNS leak test	en	information-and-network-security	robotsllmsaihumans	emailphone	none
dnssec.co.za ↗	60 match shared topic	DNSSEC - Posix System	South Africa en	information-and-network-security	robotsllmsaihumans	emailphone	none
darknebulae.net ↗	60 match shared topic	Hardened Infrastructure \| Dark Nebulae	en	information-and-network-security	robotsllmsaihumans	email phone	none
ops.tools ↗	60 match shared topic	DNS, WHOIS, IP & Network APIs \| Ops.Tools	en	computer-networking	robotsllmsaihumans	emailphone	none
tracemyip.org ↗	55 match shared topic	Trace My IP \| IP Address Tracker \| Visitor IP Location \| Computer ID	en	information-and-network-security phpBB	robotsllmsaihumans	emailphone	none
gtt.net ↗	55 match shared topic	GTT \| Leading Global Networking and Security as a Service Provider	United States~ en	information-and-network-security WordPress	robotsllmsaihumans	emailphone	none
anyone.io ↗	55 match shared topic	Anyone Protocol	en	information-and-network-security	robotsllmsaihumans	emailphone	none
extrahop.com ↗	55 match shared topic	Modern NDR for the Modern Enterprise — ExtraHop	en	information-and-network-security WordPress	robotsllmsaihumans	emailphone	none
infoblox.com ↗	55 match shared topic	Infoblox - Future-Proof DDI to Unite Networking and Security	United States~ en	computer-networking WordPress	robots llmsaihumans	email phone	none
portscan.com ↗	55 match shared topic	Free Online Port Scanner - no account, no signup, no API key	en	computer-networking	robots llmsaihumans	emailphone	none
overload.su ↗	55 match shared topic	Overload - Best L4 & L7 IP Stresser	en	information-and-network-security	robotsllmsaihumans	emailphone	none

How the match score works

Each match is a 0–100 similarity score — the higher it is, the more two sites resemble one another. It’s computed automatically from our own crawl data (never from what a site says about itself) by combining several independent signals, so a high score means several of them point the same way:

shared topics how many of the same fine‑grained content topics (IAB sub‑categories) both sites cover — the main signal.
same category whether they sit in the same business / industry category.
content & title how closely their titles and page descriptions line up in wording and meaning.

No single signal decides the result — they’re blended together. Treat the score as a way to rank candidates rather than an absolute percentage; the chips on each result show which signals contributed.