What does HTTP error 61 mean and what can I do about it?

The crawl status code "Unknown HTTP Code -61" means that the site is blocking all crawlers, or our IP range specifically, at the server or network level, so our crawler is not even able to check the robots.txt file to see if it's safe to crawl the site.

If you encounter this error code, your best bet is to have the website administrator ensure that they are not blocking our IP range at either the server or network level.