Validate IPv4

Check four dotted-decimal IPv4 octets and classify common address ranges.

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ToolIPv4 Validator
Input
Output
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Preview

How it works

The address is split into four decimal octets, each constrained to 0–255 without leading-zero aliases. Prefix ranges then label private, loopback, multicast, or current-network examples.

  • Four octets and 0–255 are the 32-bit dotted form.
  • Range labels are classifications, not routing lookups.

Worked example

Valid Public IP
Validate a public IPv4 address
Input
											8.8.8.8
Output
												Valid IPv4: 8.8.8.8
Type: Public

When to use this

Firewall rules, DHCP reservations, and networking lessons validate IPv4 text.

Edge cases

  • 010.0.0.1 is rejected instead of interpreted as octal.
  • 300.1.1.1 fails because an octet exceeds 255.
  • 224.0.0.1 is valid syntax but multicast rather than public.

References