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The result uses CIDR notation and can be used by an administrator to block a range of IP addresses. The template can be used by editing any page, inserting the template, and previewing the result. There is no need to save the edit. As an example, you could edit your sandbox and replace its contents with
Template {{IPaddr}} is used to make an IP address stand out in the text, to improve readability. Template parameters [Edit template data] This template prefers inline formatting of parameters. Parameter Description Type Status IP address 1 The IP address to display, either IPv4 or IPv6. An IP address is displayed in italics, using lower case letters for IPv6 addresses. Example 198.51.100.52 or ...
Ranges There are two types of IP ranges CIDR ranges, e.g. 123.123.123.0/24; Non-CIDR ranges; The latter are frequently found in the allocation of IP-address ranges by for instance a provider to a customers or DHCP allocated addresses for certain purposes, as can be found by querying the WHOIS dataase of a RIR.
Historical IP address lists: "INTERNET PROTOCOL ADDRESS SPACE". Internet Assigned Numbers Authority (IANA). October 2000. Archived from the original on 18 October 2000 First version of IANA table with historical notes via the Internet Archive Wayback Machine. "Internet Protocol v4 Address Space".
Used for link-local addresses [5] between two hosts on a single link when no IP address is otherwise specified, such as would have normally been retrieved from a DHCP server 172.16.0.0/12 172.16.0.0–172.31.255.255
CIDR provides fine-grained routing prefix aggregation. For example, if the first 20 bits of their network prefixes match, sixteen contiguous / 24 networks can be aggregated and advertised to a larger network as a single / 20 routing table entry. This reduces the number of routes that have to be advertised.
Longest prefix match (also called Maximum prefix length match) refers to an algorithm used by routers in Internet Protocol (IP) networking to select an entry from a routing table. [1] Because each entry in a forwarding table may specify a sub-network, one destination address may match more than one forwarding table entry. The most specific of ...
IP addresses in dot-decimal notation are also presented in CIDR notation, in which the IP address is suffixed with a slash and a number, used to specify the length of the associated routing prefix. For example, 127.0.0.1/8 specifies that the IP address has an eight-bit routing prefix, and therefore the subnet mask 255.0.0.0.