To sign up for etherscan.io:
Go to etherscan.io.
On the homepage, go to the top right-hand corner and click on “LOGIN” next to the search box.
On the Login page, click on Register For A New Account.
The registration page will load.
Once you have entered all the necessary information, click on the “I’m not a robot” Captcha box and click the blue “Register” button.
The “Account Pending Email Verification” page will load, showing the following message:
Your account has been successfully registered. Please check your mailbox for your validation email and ensure that your spam filters allow emails from firstname.lastname@example.org.
Check your inbox for the email from etherscan.io. If you’re unable to find the email in your inbox, check your junk/spam email box.
Open the email and click on the blue link to confirm and verify your email.
The blue link will take you to a new URL tab.
Now you can login with your username and password to access all the amazing tools that etherscan.io provides for registered users!