| Date | Description |
|---|---|
| 2022-06-25 | update robots_txt_status plumbbobresearch.com: 404 => 200 |
| 2022-06-25 | update robots_txt_status www.plumbbobresearch.com: 404 => 200 |
| 2021-04-01 | update website_status IndexPageFetchError => OK |
| 2019-02-14 | update website_status OK => IndexPageFetchError |