Manual Auto-Registration procedure
In order to complete the registration of your cable modem or set top box, and to register for ntlworld username and ISP services, make sure that your PC is using your cable modem connection (not dial-up), then launch your web browser, which
must have
JavaScript enabled. If your web-browser hangs or gives an error page when launched, this might be because it is trying to connect to a home page which is disallowed until you have completed this registration: just click
Stop. Send your web browser to
https://autoreg.autoregister.net/start.html (note the
https rather than http) and follow the on-screen instructions. When asked for a Serial Number:
- for stand-alone cable modem users, the serial number is ntl-ct8-cb485.
- for digital TV set top box users, the serial number is ntl-ct8-cb487.
There will be a long pause while the registration system verifies the identity of your cable modem: if this never finishes, this might be because your browser does not have
JavaScript enabled. You are then asked for other data from your Welcome letter (be sure to maintain the correct upper-case and lower-case distinction). Then follow the on-screen instructions.
After successful online registration, it is then necessary to power the cable modem off and on again (do not mistake the SB4100 front standby button for a power button) to load the proper
configuration file and obtain the intended class of service, and then re-boot your PC. You will know when you get a final configuration when your PC gets given an IP address outside the
temporary ranges. Surfboard users can check the class of service they have obtained by viewing the
cable modem log after the re-boot.