[U2Lynne]

Is this a modem that you set up or did someone else in the house set it up for you? If you set it up, and you never changed the password, then you should be able to look in the manual and find this information. If you don't have the manual, then usually you can find the pdf on the manufacturers website. Have you tried looking there? If you weren't the one who set it up, it could be that the person who did set it up changed the username and/or password and you will need to ask them this information.