mxtoolbox.com
Network diagnostic toolbox for DNS, MX, blacklist, SMTP, and domain health checks.
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remote.12dt.com
Remote DNS Lookup is a web tool for finding, checking, or analyzing online information related to domains, networks, and digital services.
one-plus.github.io
OSINT Toolkit Website Information is a collection of tools for researching websites, IP addresses, domains, emails and MAC addresses. It lists lookups including Ping Website, Whois, reverse Whois, network and TLD lookup, IP history and geolocation, MAC vendor lookup, DNS report and header and source code search. The page states that some tools require the IP address, email address, domain name or MAC address of the target.
website.informer.com
Website.informer offers a free aggregated report on any domain, including WHOIS, visitors, IP and DNS details, competitors, and owners. It provides website statistics such as daily visitors, safety status, and global rank, plus competitor and similar-site research. It also offers IP and DNS lookup, WHOIS records, a browser extension for website analysis and security checks, and email-to-domain matching from WHOIS data.
o0.pages.dev
1Hosts provides DNS filter and blocklists in Lite and Xtra variants intended to block ads, trackers and malware. Lite is described as balanced for general users with low false positives, while Xtra is aggressive and may disrupt legitimate sites or services.
badmojr.github.io
1Hosts provides DNS filter and blocklists, offered in two variants. The Lite version is described as a balanced version prioritizing smooth UX, while the Xtra version is described as aggressive with maximum blocking. Compatible software listed includes AdAway, Pi-hole, uBlock Origin, AdGuardHome and dnsmasq. The project states it has been actively maintained since December 2, 2017.
centralops.net
Collection of online network tools for DNS, IP lookup, email checks, and security research.
developers.cloudflare.com
This documentation page lists IPv4 and IPv6 addresses for the Cloudflare DNS resolvers 1.1.1.1 and 1.1.1.1 for Families, providing two addresses per resolver for redundancy. The standard resolver offers DNS lookups with no content filtering. The for Families variant adds automatic filtering to block known malware, phishing and optionally adult content.
dnsdumpster.com
A free domain research tool that discovers hosts related to a domain and looks up DNS records. It presents visible hosts from an attacker's perspective for red and blue teams, and is intended for reconnaissance, penetration testing, bug bounties, threat analysis and network OSINT.
dnsperf.com
DNSPerf compares the speed and uptime of enterprise and commercial DNS services. It lists DNS providers sorted by DNSPerf rank based on data for the last 30 days, calculated using 40% performance, 45% uptime and 15% quality.
github.com
DNS and content blocklists for blocking ads, trackers, malware, and unwanted domains.
iana.org
IANA performs the global coordination of the DNS Root, IP addressing, and other Internet protocol resources. It manages the DNS Root Zone, the .int and .arpa registries, and the IDN Practices Repository, and coordinates global IP and AS number spaces. It also maintains protocol name and number registries and a time zone database.
quad9.net
Quad9 is a free public recursive DNS service operated by the Swiss-based Quad9 Foundation. It replaces a default ISP or enterprise DNS configuration and blocks lookups of malicious host names from a threat list, aiming to protect devices against malware, phishing, spyware and botnets. Service addresses support malware blocking and DNSSEC validation, with optional encryption via HTTPS and TLS.
redirect.name
A DNS-based URL redirection service. Two DNS records describe a redirect: a CNAME or A record points the hostname at the service server, and a TXT record gives the redirect rule. Rules support permanent and temporary redirects, path matching and wildcards, and destinations can use http, https, ftp, mailto, magnet or absolute paths. HTTPS certificates are issued automatically by Let's Encrypt.
safing.io
Portmaster is a free and open-source application firewall from Safing that monitors network connections on a computer. It blocks trackers and malware hosts system-wide and routes DNS queries over DNS-over-TLS by default. Users can set global and per-application rules, including cutting off applications from the internet or restricting connections to certain countries. Downloads are offered for Windows, Debian/Ubuntu and Fedora.
isp.tools
Is a free platform offering network diagnostic tools (ping, traceroute, MTR, DNS, WHOIS, HTTP, etc.) tailored for ISPs and infrastructure professional
aware-online.com
A page listing third-party links and tools for investigations on websites and domain names. Entries cover WHOIS lookups, DNS history, SSL certificates, subdomain finding, open ports, archived information and source code investigations, with notes on whether a paid account is needed.
github.com
Open source link management platform for short links, branded domains, and analytics.
4everproxy.com
4everproxy is a web proxy and VPN service that hides the IP address while browsing. The web proxy requires no additional software. Premium VPN plans list unlimited bandwidth, all server locations, eight active devices and private DNS. The VPN application is available for Windows and Android; other devices use OpenVPN.
github.com
A GitHub repository listing packages, services and manuals related to web scraping. It covers libraries for Python, PHP, Ruby, JavaScript and Go, command line tools, and web-scraping manuals. It also lists headless browsers, DNS over HTTPS providers, pastebin sites, tunneling software and captcha solving services.
bgp.tools
bgp.tools provides BGP debugging and insight into internet routing, with searching by ASN, prefix, DNS name or MAC address. Paid monitoring plans cover BGP network monitoring and IRR and RPKI monitoring.
browserleaks.com
BrowserLeaks is a suite of browser-based tools that test browser security and privacy. The tests identify ways websites may reveal a real IP address, collect device information and perform browser fingerprinting. Tools include IP address display, reverse IP lookup, HTTP header, country, ISP and local time checks, plus WebRTC, DNS and IPv6 leak tests. A Features Detection tool lists HTML5 feature support.
github.com
Dnscrypt Proxy is a code project with source, releases, documentation, or setup notes.
grc.com
GRC.COM hosts a collection of free downloadable programs and resources, including its DNS Benchmark, ValiDrive, InControl and InSpectre tools. The page lists projects by current popularity and notes daily and total download counts.