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Microsoft Windows, IBM OS/2: Proprietary commercial software. ReactOS: GNU General Public License. nslookup (from name server lookup) is a network administration command-line tool for querying the Domain Name System (DNS) to obtain the mapping between domain name and IP address, or other DNS records .
dig is a network administration command-line tool for querying the Domain Name System (DNS). dig is useful for network troubleshooting and for educational purposes. [ 2] It can operate based on command line option and flag arguments, or in batch mode by reading requests from an operating system file. When a specific name server is not specified ...
In computer networks, a reverse DNS lookup or reverse DNS resolution ( rDNS) is the querying technique of the Domain Name System (DNS) to determine the domain name associated with an IP address – the reverse of the usual "forward" DNS lookup of an IP address from a domain name. [ 1] The process of reverse resolving of an IP address uses PTR ...
A DNS name server is a server that stores the DNS records for a domain; a DNS name server responds with answers to queries against its database. The most common types of records stored in the DNS database are for start of authority ( SOA ), IP addresses ( A and AAAA ), SMTP mail exchangers (MX), name servers (NS), pointers for reverse DNS ...
DNS zone transfer, also sometimes known by the inducing DNS query type AXFR, is a type of DNS transaction. It is one of the many mechanisms available for administrators to replicate DNS databases across a set of DNS servers . A zone transfer uses the Transmission Control Protocol (TCP) for transport, [ 1][ 2] and takes the form of a client ...
Returns a 32-bit IPv4 address, most commonly used to map hostnames to an IP address of the host, but it is also used for DNSBLs, storing subnet masks in RFC 1101, etc. AAAA. 28. RFC 3596 [ 2] IPv6 address record. Returns a 128-bit IPv6 address, most commonly used to map hostnames to an IP address of the host. AFSDB.
Unbound is a validating, recursive and caching DNS server designed for high performance. It was released on May 20, 2008 (version 1.0.0) as free software licensed under the BSD license by NLnet Labs. It is installed as part of the base system in FreeBSD starting with version 10.0, and in NetBSD with version 8.0.
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.