I think no one knows my new phone number yet.

If we all step out, they will know our number.

After all, some of the men who knew her private number were important.

The number of dead is now known to be 69.

They seem far more likely than the others to have been part of a set, whose number is not yet known.

A number of others are known to have been lost.

The number of members in the group is not known.

I knew the number by heart, which was a bad sign all on its own.

No one even knows the true number of species in the world, they say.

I don't know the number, but they come more often now.