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  2. Template:IP range calculator - Wikipedia

    en.wikipedia.org/wiki/Template:IP_range_calculator

    Multiple IPv6 addresses can be entered, as shown in the following example which uses a long command, not shown for brevity. The first two rows show that 3 of the entered addresses are in a /33 range, while 72 are in a /64. Blocking the /33 would affect 2G /64, that is, over 2 billion /64 allocations, but would block only 3 of the given addresses.

  3. Template:IPnr - Wikipedia

    en.wikipedia.org/wiki/Template:IPnr

    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 ...

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

    en.wikipedia.org/wiki/List_of_assigned_/8_IPv4...

    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. 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 ...

  6. Reserved IP addresses - Wikipedia

    en.wikipedia.org/wiki/Reserved_IP_addresses

    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

  7. IPv4 shared address space - Wikipedia

    en.wikipedia.org/wiki/IPv4_shared_address_space

    If an ISP deploys a CGN and uses private Internet address space [2] (networks 10.0.0.0 / 8, 172.16.0.0 / 12, 192.168.0.0 / 16) to connect their customers, there is a risk that customer equipment using an internal network in the same range will stop working.

  8. Multicast address - Wikipedia

    en.wikipedia.org/wiki/Multicast_address

    In support of link-local multicasts which do not use IGMP, any IPv4 multicast address that falls within the *.0.0.0 / 24 and *.128.0.0 / 24 ranges will be broadcast to all ports on many Ethernet switches, even if IGMP snooping is enabled, so addresses within these ranges should be avoided on Ethernet networks where the functionality of IGMP ...

  9. Subnet - Wikipedia

    en.wikipedia.org/wiki/Subnet

    This notation was introduced with Classless Inter-Domain Routing (CIDR). [2] In IPv6 this is the only standards-based form to denote network or routing prefixes. For example, the IPv4 network 192.0.2.0 with the subnet mask 255.255.255.0 is written as 192.0.2.0 / 24 , and the IPv6 notation 2001:db8:: / 32 designates the address 2001:db8:: and ...