How can I check if my linked domain name has been crossed by K?

When designing and creating a new website, you must register a suitable domain name, although the domain name is good, it is recommended that you know whether the website has been recorded by baidu, google, or K. My own website is a website directory site (www.digg58.com), which reviews some submitted URLs almost every day. First, I want to know whether the website has been indexed by Baidu and GOOGLE or has been indexed by these search engines. I have summarized some useful experiences in many practices:

1. Use the site:/link: two search commands to view the domain name's indexing status. If the value is 0, but there are many external connections, the domain name has been K.

2. Enter the website address query directly in the search engine. If several results contain the domain name but the site does not, the domain name may already be K. (One possibility is that the search engine index is not immediately published in the search results .)

3. Check the website history page and website world rankings to determine whether the domain name is an old domain name.

4, query whether the domain name has done the website, open the http://web.archive.org/web/ to enter the domain name you want to query and then Take Me Back, if you have done the site will have data displayed.

5. Open Baidu and enter domain: *** in Baidu's search bar :***. com. If there is a record, use site :***. if there is no record for com, the domain name may be K.