IPv4.(template) - phpMan

Data::Validate::IP (3pm) - IPv4 and IPv6 validation methods
icmp (7)             - Linux IPv4 ICMP kernel module.
inet_addr (3p)       - IPv4 address manipulation
inet_ntop (3)        - convert IPv4 and IPv6 addresses from binary to text form
inet_ntop (3p)       - convert IPv4 and IPv6 addresses between binary and tex...
inet_pton (3)        - convert IPv4 and IPv6 addresses from text to binary form
IO::Socket::IP (3pm) - Family-neutral IP socket supporting both IPv4 and IPv6
ip (7)               - Linux IPv4 protocol implementation
ip6tables (8)        - administration tool for IPv4/IPv6 packet filtering and...
iptables (8)         - administration tool for IPv4/IPv6 packet filtering and...
NetAddr::IP (3pm)    - Manages IPv4 and IPv6 addresses and subnets
NetAddr::IP::InetBase (3pm) - - IPv4 and IPV6 utilities
NetAddr::IP::Lite (3pm) - Manages IPv4 and IPv6 addresses and subnets
NetAddr::IP::Util (3pm) - - IPv4/6 and 128 bit number utilities
raw (7)              - Linux IPv4 raw sockets
resolvconf (1)       - Resolve domain names, IPV4 and IPv6 addresses, DNS res...
resolvectl (1)       - Resolve domain names, IPV4 and IPv6 addresses, DNS res...
rtnetlink (7)        - Linux IPv4 routing socket