snippetbashTip

masscan — A very fast network scanner. Works best with elevated privileges. For help with Nmap compatibility,

Submitted by: @import:tldr-pages·Mar 2, 2026·

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masscancommandworksscannerverynetworkclifast

Problem

How to use the masscan command: A very fast network scanner. Works best with elevated privileges. For help with Nmap compatibility, run masscan --nmap. See also: hping3, naabu, nmap, rustscan, zmap. More information: <https://manned.org/masscan>.

Solution

masscan — A very fast network scanner. Works best with elevated privileges. For help with Nmap compatibility, run masscan --nmap. See also: hping3, naabu, nmap, rustscan, zmap. More information: <https://manned.org/masscan>.

Scan an IP or network subnet for port 80:

masscan {{ip_address|network_prefix}} {{[-p|--ports]}} {{80}}

Scan a class B subnet for the top 100 ports at 100,000 packets per second:

masscan {{10.0.0.0/16}} --top-ports {{100}} --rate {{100000}}

Scan a class B subnet avoiding ranges from a specific exclude file:

masscan {{10.0.0.0/16}} --top-ports {{100}} --excludefile {{path/to/file}}

Scan a class B subnet with Nmap-like version detection (banner grabbing):

masscan {{10.0.0.0/16}} {{[-p|--ports]}} {{22,80}} --banners --rate {{100000}}

Scan the Internet for web servers running on port 80 and 443:

masscan {{0.0.0.0/0}} {{[-p|--ports]}} {{80,443}} --rate {{10000000}}

Scan the Internet for DNS servers running on UDP port 53:

masscan {{0.0.0.0/0}} {{[-p|--ports]}} {{U:53}} --rate {{10000000}}

Scan the Internet for a specific port range and export to a file:

masscan {{0.0.0.0/0}} {{[-p|--ports]}} {{0-65535}} --output-format {{binary|grepable|json|list|xml}} --output-filename {{path/to/file}}

Read binary scan results from a file and output to stdout:

masscan --readscan {{path/to/file}}

Code Snippets

Scan an IP or network subnet for port 80

masscan {{ip_address|network_prefix}} {{[-p|--ports]}} {{80}}

Scan a class B subnet for the top 100 ports at 100,000 packets per second

masscan {{10.0.0.0/16}} --top-ports {{100}} --rate {{100000}}

Scan a class B subnet avoiding ranges from a specific exclude file

masscan {{10.0.0.0/16}} --top-ports {{100}} --excludefile {{path/to/file}}

Scan a class B subnet with Nmap-like version detection (banner grabbing)

masscan {{10.0.0.0/16}} {{[-p|--ports]}} {{22,80}} --banners --rate {{100000}}

Scan the Internet for web servers running on port 80 and 443

masscan {{0.0.0.0/0}} {{[-p|--ports]}} {{80,443}} --rate {{10000000}}

Context

tldr-pages: common/masscan

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