Deep dives on IP lookup, DNS, VPN privacy, subnetting, and troubleshooting - written for admins, developers, and curious users.
Almost every home internet plan gives you a dynamic IP by default. Here's what that means, and exactly what BT, Sky, Virgin, Eir, Xfinity, Spectrum, and Telekom offer if you need a static one.
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A port checker tells you if a specific port on your device or server is open, closed, or blocked. Here's what that means and how to check yours in seconds.
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You may have noticed that IP checker tools sometimes show two addresses — one that looks like "203.0.113.45" and another that looks like...
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Your IP address showing the wrong city or country isn't a glitch. Here's why it happens, how accurate IP location really is, and what GDPR says about it in Europe.
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Not just what your IP address is - how it actually works. Addressing, routing, NAT, and allocation explained clearly, from basics to advanced.
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Find your IPv4 address in seconds, on Windows, Mac, Android, or iPhone. Learn what IPv4 means, how it's different from IPv6, and why your number might match someone else's.
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Find your IP address in seconds and learn what it's actually used for — troubleshooting, gaming, streaming, and security — explained simply.
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Your device has two IP addresses at once, not one. Here's the real difference between your public and private IP, and why it matters for gaming, remote access, and troubleshooting.
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Most devices sit behind a NAT router, and that breaks the basic assumption TCP was built on: a fixed, reachable server address. This article walks through how NAT and firewalls block incoming TCP connections, why some peer-to-peer connections fail while others work fine, and the…
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Slow speeds on specific apps or times of day could mean throttling. Here's how to actually test for it, rather than just suspect it.
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