I am on rural broadband and have VOIP via the Vodafone network.  With caller ID working, is the incoming call meant to display the phone number and the name of the person calling or just the number?

Vodafone say the name of the person will be displayed only if that number is in my own phones' phonebook but I thought if the number is listed in the whitepages then the name of the caller should be displayed as well?  Is this how caller id works with Spark on a landline connection?

Thanks