Reverse DNS 2013 2017

Project Sonar produces a Reverse DNS dataset every two weeks. This data is created by performing a PTR lookup for all IPv4 addresses.

The data format is a gzip-compressed CSV file. The fields consist of the IP address and PTR value. The command below grabs the first 10 entries from the 2014-12-17 RDNS dataset. A typical dataset contains 1.2 billion records.

$ curl -s https://scans.io/data/rapid7/sonar.rdns/20141217-rdns.gz | \ 
  zcat | head -n 10

1.0.100.1,1.100.0.1.megaegg.ne.jp
1.0.100.10,10.100.0.1.megaegg.ne.jp
1.0.100.100,100.100.0.1.megaegg.ne.jp
1.0.100.101,101.100.0.1.megaegg.ne.jp
1.0.100.102,102.100.0.1.megaegg.ne.jp
1.0.100.103,103.100.0.1.megaegg.ne.jp
1.0.100.104,104.100.0.1.megaegg.ne.jp
1.0.100.105,105.100.0.1.megaegg.ne.jp
1.0.100.106,106.100.0.1.megaegg.ne.jp
1.0.100.107,107.100.0.1.megaegg.ne.jp