German Phrase
Welche Nummer hat deren Kundenservice?
Meaning
The sentence asks for the telephone number of a company's customer service department. It is a polite, formal way to request contact information, especially when you are dealing with a business or a third‑party service.
When to use
Use this question when you need the phone number of a company's support line – for example, when you are on the phone with a colleague, writing an email, or speaking with a receptionist. It works well in both spoken and written German in a business context.
✦Grammar Breakdown
WelcheNummerhatderenKundenservice?
Welche (interrogative determiner)
‘Welche’ is used to ask about a specific item and agrees in gender, number, and case with the noun it modifies; here it matches the feminine noun ‘Nummer’ in nominative.
Nummer (feminine noun)
‘Nummer’ is a feminine noun (die Nummer) meaning ‘number’; in this question it is the subject of the sentence.
hat (3rd person singular of haben)
The verb ‘haben’ is conjugated as ‘hat’ for third‑person singular subjects; it asks what the subject ‘Nummer’ possesses.
deren (genitive relative pronoun)
‘Deren’ is the genitive form of the relative pronoun for plural antecedents, meaning ‘their’; it shows possession of ‘Kundenservice’.
Kundenservice (masculine noun)
‘Kundenservice’ (der Kundenservice) is a masculine noun meaning ‘customer service’; it is the object of the genitive construction ‘deren Kundenservice’.
🗨In Conversation
Entschuldigung, welche Nummer hat deren Kundenservice?
Excuse me, what number does their customer service have?
Die Nummer ist 0800‑1234567.
The number is 0800‑1234567.
✕Common Mistakes
Welche Nummer hat ihr Kundenservice?
‘ihr’ is a possessive adjective (her/their) but does not replace the genitive ‘deren’ in this construction.
Welche Nummer haben deren Kundenservice?
The verb must be conjugated to match the singular subject ‘Nummer’; ‘haben’ is the infinitive.
Welcher Nummer hat deren Kundenservice?
‘Welcher’ is masculine; the noun ‘Nummer’ is feminine, so the correct form is ‘Welche’.
↔Alternatives
Wie lautet die Telefonnummer des Kundenservice?
What is the phone number of the customer service?
Können Sie mir die Kundendienst‑Nummer geben?
Can you give me the customer service number?
Unter welcher Nummer erreicht man den Kundenservice?
Under which number can you reach the customer service?
Cultural Tip
In German business communication, it is common to use the formal ‘Sie’ form and to refer to the service department as ‘Kundenservice’ or ‘Kundendienst’. When asking for a phone number, you can also say ‘Telefonnummer’ for extra clarity. Remember that many German companies have toll‑free numbers starting with 0800, which are free to call from landlines.