IPv4 is version 4 of the Internet Protocol, which identifies devices with 32-bit addresses written as four decimal numbers separated by dots. The format allows roughly 4.3 billion unique addresses.
Why it matters
IPv4 still carries most traffic, but the available addresses have been exhausted at the registry level, so providers share addresses using NAT and trade blocks. Websites are normally given an A record pointing to an IPv4 address, often alongside an AAAA record for IPv6.
Dual-stack setups run IPv4 and IPv6 side by side, which is the practical approach for most sites today.
Example
192.0.2.1 -> four 8-bit numbers (0-255)
DNS: example.com. IN A 192.0.2.1Private ranges such as 10.0.0.0/8 and 192.168.0.0/16 are reserved for internal networks.
Common mistakes
- Writing numbers above 255 in an address, which is invalid.
- Mixing up public and private IPs when configuring port forwarding or firewalls.
- Ignoring IPv6 and leaving AAAA records pointing to a dead server.
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यह पेज सामान्य जानकारी है, जिसे हमारी संपादकीय टीम ने लिखा है और दस्तावेज़ीकरण बदलने पर अपडेट किया जाता है। सर्वर और प्रदाता अलग-अलग होते हैं, इसलिए बदलाव पहले सुरक्षित तरीके से जाँचें। देखें: संपादकीय नीति और अस्वीकरण.