How do I know that my Phone Line has transferred to PlusNet?

[#1]

Today is the day that is scheduled for the transfer of my Phone Line to PlusNet.
How can I get confirmation that this has happened?

[#2]

Hi Wheel_nut,
Our records indicate that your phone service is now active with us.
Jojo

[#3]

Thanks Joanne. I was a little previous because I got the email confirmation this morning.
Many tahnks, R