1. Asiainfo technologies. https://www.asiainfo.com/en_us/index.html
2. Capsa network analyzer. http://www.colasoft.com/capsa/
3. Mcafee global threat intelligence. https://www.mcafee.com/enterprise/en-gb/threat-center/global-threat-intelligence-technology.html
4. Netlab opendata project. https://data.netlab.360.com/
5. Top 1 million website in the world. https://majestic.com/reports/majestic-million