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# Basic Information **WHOIS** (pronounced as the phrase "who is") is a query and response protocol that is widely used for querying databases that store the registered users or assignees of an Internet resource, such as a domain name, an IP address block or an autonomous system, but is also used for a wider range of other information. (From [here](https://en.wikipedia.org/wiki/WHOIS)) **Default port:** 43 ``` PORT STATE SERVICE 43/tcp open whois? ``` # Enumerate Get all the information that a whois service has about a domain: ```bash whois -h -p "domain.tld" echo "domain.ltd" | nc -vn ``` Notice than sometimes when requesting for some information to a WHOIS service the database being used appears in the response: .png>) Also, the WHOIS service always needs to use a **database** to store and extract the information. So, a possible **SQLInjection** could be present when **querying** the database from some information provided by the user. For example doing: `whois -h 10.10.10.155 -p 43 "a') or 1=1#"` you could be able to **extract all** the **information** saved in the database. # Shodan * `port:43 whois` # HackTricks Automatic Commands ``` Protocol_Name: WHOIS #Protocol Abbreviation if there is one. Port_Number: 43 #Comma separated if there is more than one. Protocol_Description: WHOIS #Protocol Abbreviation Spelled out Entry_1: Name: Notes Description: Notes for WHOIS Note: | WHOIS (pronounced as the phrase "who is") is a query and response protocol that is widely used for querying databases that store the registered users or assignees of an Internet resource, such as a domain name, an IP address block or an autonomous system, but is also used for a wider range of other information. https://book.hacktricks.xyz/pentesting/pentesting-smtp Entry_2: Name: Banner Grab Description: Grab WHOIS Banner Command: whois -h {IP} -p 43 {Domain_Name} && echo {Domain_Name} | nc -vn {IP} 43 ```

Learn AWS hacking from zero to hero with htARTE (HackTricks AWS Red Team Expert)!

Other ways to support HackTricks: * If you want to see your **company advertised in HackTricks** or **download HackTricks in PDF** Check the [**SUBSCRIPTION PLANS**](https://github.com/sponsors/carlospolop)! * Get the [**official PEASS & HackTricks swag**](https://peass.creator-spring.com) * Discover [**The PEASS Family**](https://opensea.io/collection/the-peass-family), our collection of exclusive [**NFTs**](https://opensea.io/collection/the-peass-family) * **Join the** 💬 [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** me on **Twitter** 🐦 [**@carlospolopm**](https://twitter.com/carlospolopm)**.** * **Share your hacking tricks by submitting PRs to the** [**HackTricks**](https://github.com/carlospolop/hacktricks) and [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) github repos.