This is the 1487th most frequent German word.
telefonnummer
Telephone number.
The word 'Telefonnummer' is used here as a direct object in the sentence, referring to someone's phone number.
Kann ich bitte Ihre Telefonnummer haben?
Can I please have your phone number?
In this sentence, 'Telefonnummer' functions as the subject possessed by 'meine', indicating ownership.
Meine Telefonnummer hat sich geändert.
My phone number has changed.
Here, 'Telefonnummer' is the focus of the inquiry, following the preposition 'nach', showcasing how it can be part of a prepositional phrase.