Sign-in or Register
Also, to REGISTER you will need the following information:
1. Valid email address
2. 7-digit account number - it will be on your bill
3. 6-character activation code - it will be on your bill
![An image of our new bill with emphasis on the new account number and the new activation code.](/sites/default/files/styles/full_width_image/public/2019-09/New%20Bill%20Sample%20for%20Sign-Up%20Instructions%20v2%20-%20annotated%20v2_0.png?itok=Fjx5i5hO)
NOTE: Customers have experienced difficulties registering by using previous account number or activation code; these are no longer valid.
To walk you through registration, watch our tutorial video
If you have any questions or need assistance, please:
- Read the CSS Portal FAQs
- Complete our Billing Inquiry Form to contact us online
- Call Customer Service at (617) 989-7800