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Check if an IP address (IPv4 or IPv6) is within a CIDR block using this free online tool. Enter an IP and a CIDR range (e.g., 192.168.1.10 and 192.168.1.0/24) to instantly verify if the IP is part of the specified subnet. Need to calculate a CIDR range? Try our CIDR subnet calculator.
Make sure to check out our other free related tools below—they can simplify your daily work, save time, and boost your productivity.
Check if an IPv4 or IPv6 address is blacklisted with this online IP reputation check tool.
View DetailsCheck if a domain (e.g google.com) is blacklisted with this online domain reputation check tool.
View DetailsCheck if an email belongs to a disposable or temporary email service with this online email checker.
View DetailsA free online website trustworthiness check tool you can use to check the safety of web shops.
View DetailsCheck if an URL is potentially suspicious (risk score) with this online URL reputation check tool.
View DetailsWith this online SSL certificate check tool you can view and verify SSL certificate of any website.
View DetailsCreate your account, pick a subscription plan, and make your first API call instantly with your API key—simple as that!
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