It by default would have had the username of admin and either no password (blank password) however sometimes password or admin also work if it does ask for a password.
If you have updated it yourself then no one would be to tell you what you set it as, however a hard reset (most of the modems have a pin hole you can put a pin into for at least 10 second and it should reset it to factory settings and again be no password required)
If you have updated it yourself then no one would be to tell you what you set it as, however a hard reset (most of the modems have a pin hole you can put a pin into for at least 10 second and it should reset it to factory settings and again be no password required)