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rdapper - a simple console-based RDAP client.


    rdapper OBJECT


rdapper is a simple RDAP client. It uses Net::RDAP to retrieve data about internet resources (domain names, IP addresses, and autonymous systems) and outputs the information in a human-readable format. If you want to consume this data in your own program you should use Net::RDAP directly.

rdapper was originally conceived as a full RDAP client (back when the RDAP specification was still in draft form) but is now just a very thin front-end to Net::RDAP.


You can pass any internet resource as an argument; this may be:

  • a "forward" domain name such as;
  • a "reverse" domain name such as;
  • a IPv4 or IPv6 address or CIDR prefix, such as or 2001:DB8::/32;
  • an Autonymous System Number such as AS65536.
  • the URL of an RDAP resource such as
  • the "tagged" handle of an entity, such as an LIR, registrar, or domain admin/tech contact. Because these handles are difficult to distinguish from domain names, you must use the --type argument to explicitly tell rdapper that you want to perform an entity query, .e.g rdapper --type=entity ABC123-EXAMPLE.


  • --type=TYPE - explicitly set the object type. rdapper will guess the type by pattern matching the value of OBJECT but you can override this by explicitly setting the --type argument to one of : ip, autnum, domain, entity or url.

    If --type=url is used, rdapper will directly fetch the specified URL and attempt to process it as an RDAP response.

    If --type=entity is used, OBJECT must be a a string containing a "tagged" handle, such as ABC123-EXAMPLE, as per RFC 8521.

  • --help - display help message.

  • --debug - enable Net::RDAP debug mode.

  • --short - omit remarks, notices, and links. Implies --nopager.

  • --expand - attempt to "expand" truncated entity objects.

  • --bypass-cache - disable local cache of RDAP objects.

  • --auth=USER:PASS - HTTP Basic Authentication credentials to be used when accessing the specified resource.

  • --nopager - by default, rdapper will pass its output to less(1). Setting --nopager disables this behaviour.

  • --raw - output raw JSON response (implies --nopager).


Assuming you have cpan installed, installing rdapper should be as simple as running this command:

sudo cpan -i rdapper

Otherwise, you can manually install rdapper by running

perl Makefile.PL
sudo make install

You may need to manually install one or more of the dependencies listed below, if they are not already installed, using cpan or your operating system vendor's packages.


rdapper uses the following modules, some of which may already be installed:


Copyright 2019 CentralNic Ltd. All rights reserved.


Copyright (c) 2018 CentralNic Ltd. All rights reserved. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.


Command line RDAP client



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