If you've just broken the law, phoning the DVLA and pointing that out to them probably isn't going to help.
If you've been caught speeding, you've probably got three points per offence on your license. Please stop speeding.
Knowing about it isn't going to help, or change anything though, is it? If they've got your updated details on file, they'll let you know if it happens again.
In short, I don't know if you can check, or if you would really want to given that it might end up getting you in trouble for not updating your details. Probably better just to make sure that your details are now up to date, and drive safely from now on.