Ive had a look through my account stuff, and i cant find my number either ion there.
However when i first joined i had an email confirmation titled "Thanks for choosing us. Here's what happens next" and in there was information on the landline number.
As for a landline phone, i would recomend that you gt hold of a cheap corded phone to plug in in case of aan emergency , Ive had powercuts that have knocked out all the mobile networks with the only way to call out ( or in) has been via a corded phone in the landline
