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Network / IP

22 tools

Wildcard Mask CalculatorNew

Get the wildcard mask, subnet mask and usable host count from a CIDR prefix or subnet mask — handy for ACLs.

IPv4 to Integer ConverterNew

Convert an IPv4 address to a 32-bit integer and hex — or back. Useful for databases and programming.

MAC Address FormatterNew

Reformat a MAC address into every notation — colon, hyphen, Cisco dot and bare — with upper/lowercase toggle.

Subnet Calculator⭐

Calculate network information from IP and subnet mask

IP Lookup

Look up geographic location and ISP info for an IP address

DNS Lookup

Query DNS records for a domain (A, AAAA, MX, TXT, CNAME, NS)

HTTP Status Codes

Reference for all HTTP status codes (searchable)

CIDR CalculatorNew

Calculate CIDR network information

MIME Type LookupNew

Look up file extension MIME types

Port ReferenceNew

Look up common network ports

HTTP Methods ReferenceNew

HTTP methods and their properties

HTTP Headers ReferenceNew

HTTP headers and their descriptions

MAC Address GeneratorNew

Generate random MAC addresses

URL ParserNew

Parse URL into its components

DNS Record TypesNew

DNS record types reference guide

Email ValidatorNew

Validate email addresses (bulk supported)

IPv6 ConverterNew

IPv6 expand, compress and IPv4 mapping

User-Agent ParserNew

Detect browser, OS and device

IP to Binary ConverterNew

Convert IP to binary, hex and decimal

IP Class CheckerNew

Determine IP class (A-E) and type

HTML Entity ReferenceNew

Common HTML character entities

IP Range ExpanderNew

Expand a start-end IP range into a list