Projects / grepcidr


grepcidr can be used to filter a list of IP addresses against one or more Classless Inter-Domain Routing (CIDR) specifications, or arbitrary networks specified by an address range. As with grep, there are options to invert matching and load patterns from a file. grepcidr is capable of comparing thousands or even millions of IPs to networks with little memory usage and in reasonable computation time. It has endless uses in network software, including mail filtering and processing, network security, log analysis, and many custom applications.

Operating Systems

Recent releases

  •  22 Nov 2013 00:52

    Release Notes: The default behavior in 1.4 has changed to search anywhere online. The new version includes regex to search anywhere online. This release adds a -x option to search without regex, old-style strict (faster), various packaging, Makefile, and man page modernizations, enhanced documentation and manual page, and increased maximum line length to 1024 bytes.

    •  24 Apr 2005 07:53

      No changes have been submitted for this release.


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