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  2. Classless Inter-Domain Routing - Wikipedia

    en.wikipedia.org/wiki/Classless_Inter-Domain_Routing

    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 ...

  3. Template:IP range calculator - Wikipedia

    en.wikipedia.org/wiki/Template:IP_range_calculator

    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.

  4. List of assigned /8 IPv4 address blocks - Wikipedia

    en.wikipedia.org/.../8_IPv4_address_blocks

    Some large / 8 blocks of IPv4 addresses, the former Class A network blocks, are assigned in whole to single organizations or related groups of organizations, either by the Internet Corporation for Assigned Names and Numbers (ICANN), through the Internet Assigned Numbers Authority (IANA), or a regional Internet registry.

  5. Module:IPblock - Wikipedia

    en.wikipedia.org/wiki/Module:IPblock

    -- Calculate the minimum-sized blocks of IP addresses that cover each-- IPv4 or IPv6 address entered ... -- A range is a table representing a CIDR block such as 1.2 ...

  6. Subnet - Wikipedia

    en.wikipedia.org/wiki/Subnet

    The IPv6 address specification 2001:db8:: / 32 is a large address block with 2 96 addresses, having a 32-bit routing prefix. For IPv4, a network may also be characterized by its subnet mask or netmask, which is the bitmask that, when applied by a bitwise AND operation to any IP address in the network, yields the routing prefix.

  7. IPv4 - Wikipedia

    en.wikipedia.org/wiki/IPv4

    CIDR was designed to permit repartitioning of any address space so that smaller or larger blocks of addresses could be allocated to users. The hierarchical structure created by CIDR is managed by the Internet Assigned Numbers Authority (IANA) and the regional Internet registries (RIRs).

  8. Private network - Wikipedia

    en.wikipedia.org/wiki/Private_network

    RFC 1918 name IP address range Number of addresses Largest CIDR block (subnet mask) Host ID size Mask bits Classful description [Note 1]; 24-bit block: 10.0.0.0 – 10.255.255.255: 16 777 216

  9. Template talk:IP range calculator - Wikipedia

    en.wikipedia.org/wiki/Template_talk:IP_range...

    Just a quick note for now: I've been using NativeForeigner's range block calculator as a substitute for the one on WMF labs. You might want to check it out. Mike V • Talk 11:11, 14 December 2014 (UTC) I tend to do this stuff in my head and through DNS/WHOIS tools, but a range block calculator is essential for any range blocking admin.