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List of countries by IPv4 address allocation. This is a list of countries by IPv4 address allocation, as of 2 April 2012. It includes 252 areas, including all United Nations member states, plus the Holy See, Kosovo and Taiwan. There are 2 32 (over four billion) IP addresses in the IPv4 protocol. Of these, almost 600 million are reserved and ...
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. As IPv4 address exhaustion has advanced to its final stages, some organizations, such as Stanford University, formerly using 36.0.0 ...
v. t. e. A regional Internet registry (RIR) is an organization that manages the allocation and registration of Internet number resources within a region of the world. Internet number resources include IP addresses and autonomous system (AS) numbers. Map of regional Internet registries. The regional Internet registry system evolved, eventually ...
The Indian Registry for Internet Names and Numbers (IRINN) is the National Internet Registry [ 1] in India. IRINN is entrusted with the task of coordinating IP address allocation with other Internet resource management function at national level in the country. National Internet Registry for India (IRINN) was announced on 2 March 2012.
Website. www.apnic.net. APNIC. APNIC (the Asia Pacific Network Information Centre) is the regional Internet address registry (RIR) for the Asia–Pacific region. [3] It is one of the world's five RIRs and is part of the Number Resource Organization (NRO).
WHOIS. WHOIS (pronounced as the phrase "who is") is a query and response protocol that is used for querying databases that store an Internet resource's registered users or assignees. These resources include domain names, IP address blocks and autonomous systems, but it is also used for a wider range of other information.
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 1 048 576: Private network Used for local communications within a private network [3] 192.0.0.0/24 192.0.0.0–192.0.0.255 256
These databases typically contain IP address data, which may be used in firewalls, ad servers, routing, mail systems, websites, and other automated systems where a geolocation may be useful. An alternative to hosting and querying a database is to obtain the country code for a given IP address through a DNSBL-style lookup from a remote server.