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This template accepts IPv4 or IPv6 addresses as input and displays minimum-sized blocks of addresses that cover all of the inputs. 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.
8 - shows link to current block list, filtered for the IP(/range); 16 - shows link to block log for the IP[/range]; 32 - shows link to page to block the IP[/range] for 1 hour (default). Only useful for special applications. The values may be bitwise OR'ed (similar to many program languages). In other words: may be added to get any combination ...
Special address blocks Address block Address range Number of addresses Scope Description 0.0.0.0/8 0.0.0.0–0.255.255.255 16 777 216: Software Current (local, "this") network [1] 10.0.0.0/8 10.0.0.0–10.255.255.255 16 777 216: Private network Used for local communications within a private network [3] 100.64.0.0/10 100.64.0.0–100.127.255.255 ...
Each / 8 block contains 256 3 = 2 24 = 16,777,216 addresses, which covers the whole range of the last three delimited segments of an IP address. This means that 256 /8 address blocks fit into the entire IPv4 space.
SDP/SAP block Addresses in the reserved 224.2.0.0 / 16 range are not individually assigned by IANA. Fallen out of use [11]: §10 for security considerations, experimental Session Announcement Protocol [12] was the primary means of supplying addresses through Session Description Protocol, which now is mostly used in the establishment of private ...
These groups, commonly called CIDR blocks, share an initial sequence of bits in the binary representation of their IP addresses. IPv4 CIDR blocks are identified using a syntax similar to that of IPv4 addresses: a dotted-decimal address, followed by a slash, then a number from 0 to 32, i.e., a.b.c.d / n. The dotted decimal portion is the IPv4 ...
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The Internet Engineering Task Force (IETF) has reserved the IPv4 address block 169.254.0.0 / 16 (169.254.0.0 – 169.254.255.255) for link-local addressing. [1] The entire range may be used for this purpose, except for the first 256 and last 256 addresses (169.254.0.0 / 24 and 169.254.255.0 / 24), which are reserved for future use and must not be selected by a host using this dynamic ...