I am unable to find my phone number - I have checked all my welcome messages and it isn’t in any of these?
This seems to be a common question and i don't know why NOW don't add the information somewhere on customers NOW Broadband accounts.
Here's another recent thread in the link below.
Also, when I signed up I got an email headed: "Thanks for choosing us. Here's what happens next." That includes the phone number, towards the end of the message.