#cidr #ipv4 #ipv6 #ip

app cidrrr

Convert a CIDR block to a list of IPs

9 stable releases

Uses new Rust 2024

new 2026.5.14 May 14, 2026
2026.2.17 Feb 17, 2026
2025.12.2 Dec 2, 2025
2025.7.24 Jul 24, 2025
2024.3.22 Mar 21, 2024

#852 in Network programming

Custom license

14KB
288 lines

cidrrr

Does the same as cidrr, but with one more r :D

Makes inspection of IPv4 and IPv6 CIDR blocks a bit easier :)

Installation

cargo install cidrrr

Usage

# shows the first and last IP of the block
cidrrr 10.105.4.0/24

count: 254
10.105.4.1
10.105.4.254
# shows all IPs of the block as a JSON array
# count metadata is only included in plain output
# running the tool without "--danger-zone" will yield at most "1.048.576" addresses
cidrrr --all --output json 10.105.4.0/24

["10.105.4.1", "10.105.4.2", "10.105.4.3", ..., "10.105.4.253", "10.105.4.254"]

Dependencies

~1.3–2MB
~38K SLoC