What does," used your number to reach you" mean on messenger?

[Anonymous]

So this only appeared with a non-facebook friend and I deleted their number like 7 weeks ago.

[far2gud4u]

its a new FB fault. you can now search friends by their number but it brings it up loads on my fb and i haven't got a number on there

[Asker]

So basically they just looked me up on Facebook is what you're saying?

[far2gud4u]

no it seems to be a facebook error unless they entered your number to find you