Services-Whois.md
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A read-only interface is also available at http://ix.ucis.dn42/dn42/ ([public](http://ix.ucis.nl/dn42/) or 172.22.166.3). The used PHP scripts are available from UFO a.k.a. Ivo at request.
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+## DNS interface
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+There is also a DNS-based interface to query AS information from the registry. The DNS zone is `asn.dn42`. Example:
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+ $ dig +short AS76103.asn.dn42 TXT
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+ "76103 | DN42 | dn42 | | NIXNODES-IX - NixNodes CORE Network"
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+The idea comes from the guys at cymru.com, who provide this service for the Internet (e.g. `AS1.asn.cymru.com`)
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## Address space
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There is nice 3djs visualisation showing current address space usage: http://dataviz.polynome.dn42/dn42-netblock-visu/registry.html ([public](http://109.24.208.244:8888/dn42-netblock-visu/registry.html) or 172.23.184.98). The input data is taken from the registry.