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Published directory entries matching your search.
IntoDNS.AI is a DNS and mail server checker that reports on SPF, DKIM, DMARC, DNSSEC, MTA-STS, BIMI, FCrDNS and blacklists. It also offers a free public REST API for DNS and email security scans, with JSON and Markdown reports. The service states it is not affiliated with intodns.com.
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.
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.
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.
Who.is is a domain and IP information lookup service. It offers WHOIS and RDAP lookups, DNS records, nameserver lookup, IP address lookup, domain history and uptime checks. Premium offerings include downloadable domain history reports, website monitoring for up to 10 domains and API access providing parsed WHOIS, RDAP, DNS and TLS certificate data as JSON over HTTPS, with a free tier.
LeakIX is a search and reporting platform with query syntax for ports, protocols, ASNs and IP ranges. It offers free and commercial plans, with paid tiers providing faster access to results, higher request limits, critical and RCE plugins, alert channels and downloadable results. Sponsorship supports voluntary researchers who dispatch free reports to companies and institutions.
nsupdate.info is a free dynamic DNS service and free and open-source software. It is written in Python and Django, and the site states it will not display ads or spam.
GetFreeDomain is a directory listing free domain names and short subdomains with full DNS support and no injected ads. It provides a table of available suffixes, including notes on registries that have stopped accepting new registrations.
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.
IPVoid is a free service from NoVirusThanks Company Srl offering online IP address, network and DNS tools. It began in 2010 as an IP blacklist checker and later added more tools, now numbering more than 80, usable from a web browser without registration.
Is a free platform offering network diagnostic tools (ping, traceroute, MTR, DNS, WHOIS, HTTP, etc.) tailored for ISPs and infrastructure professional
Kener is a free, open-source status page and uptime monitor that can be self-hosted with Docker. It monitors API, Ping, TCP, DNS, SSL, SQL, Heartbeat, GameDig, and gRPC services with configurable check intervals and thresholds, and it provides incident management, maintenance scheduling, notifications, embeddable widgets, and a REST API.
Kutt is a free, open source modern URL shortener. It supports custom domains, link management, usage statistics, an API for programmatic access, and offers browser extensions for Chrome and Firefox, with options to self-host the service.
NETworkManager is a free, open-source tool for managing networks and troubleshooting network problems. It includes 28 built-in tools such as an IP scanner, port scanner, ping monitor, DNS lookup, remote desktop and PowerShell in a single interface. It offers profiles for organizing hosts, and no license, subscription or telemetry.
Pingdom's free Website Speed Test analyzes a webpage's load time and identifies bottlenecks. A full page test breaks requests into stages such as DNS lookup, SSL handshake, connect, send, wait, receive and blocked, and flags redirects and 4xx or 5xx responses. Pingdom also offers uptime and performance monitoring from more than 70 global polling locations.
