---
name: "altdns"
section: "1"
platform: "linux"
package: "altdns"
version: "1.0.2+git20250109.6728272-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/altdns"
---

# altdns(1)

Subdomain discovery through alterations and permutations

## NAME

**altdns** - Subdomain discovery through alterations and permutations

## SYNOPSIS

**altdns** \[*POSITION*\] \[*argument*\]

## DESCRIPTION

```
altdns - is a package containing a DNS reconnaissance tool that allows
discovery of subdomains that conform to patterns. Altdns takes in words that
could be present in subdomains under a domain (such as test, dev, staging) as
well as takes in a list of subdomains that you know of.
```

## USAGE

usage: **altdns** \[**\[-h\] -i INPUT -o OUTPUT \[-w WORDLIST\] \[-r\] \[-n\] \[-e\] \[-d DNSSERVER\] \[-s SAVE\]  \[-t THREADS\]**\]

## OPTIONS

```
 options:
      -h, --help
               show this help message and exit
      -i INPUT, --input INPUT
               List of subdomains input
      -o OUTPUT, --output OUTPUT
               Output location for altered subdomains
      -w WORDLIST, --wordlist WORDLIST
               List of words to alter the subdomains with
      -r, --resolve
                Resolve all altered subdomains
      -n, --add-number-suffix
                Add number suffix to every domain (0-9)
      -e, --ignore-existing
                Ignore existing domains in file
      -d DNSSERVER, --dnsserver DNSSERVER
                 IP address of resolver to use (overrides system default)
      -s SAVE, --save SAVE
                 File to save resolved altered subdomains to
      -t THREADS, --threads THREADS
                 Amount of threads to run simultaneously
```

## EXAMPLES

**altdns -i subdomains.txt -o data\_output -w words.txt -r -s results\_output.txt**

## SEE ALSO

Take a look at /usr/share/doc/altdns/README.md, for information on how to use.

## AUTHOR

Altdns Project https://github.com/**infosec-au**/altdns/

Josenilson Ferreira da Silva \<nilsonfsilva@hotmail.com\> Created this