These crawls are part of an effort to archive pages as they are created and archive the pages that they refer to. That way, as the pages that are referenced are changed or taken from the web, a link to the version that was live when the page was written will be preserved.
Then the Internet Archive hopes that references to these archived pages will be put in place of a link that would be otherwise be broken, or a companion link to allow people to see what was originally intended by a page's authors.
Enter your phone number when directed, along with the country code.
If your phone number is linked to a Twitter account, we'll send your phone a text message containing a verification code. Use this code to confirm that the mobile number belongs to you.
On the following page, Twitter will ask you to complete your Twitter profile. Your username will already be filled in. That username belongs to the same account your phone is tied to.
Possible errors:
If your number is connected to an account and you've already logged in on twitter.com before, the steps above will prompt you to log in with your username and email instead. Recover a lost password here.
If your mobile number is not connected to any Twitter accounts, you'll see an error message. Sign up for a new account here.