To ask someone for their telephone number in Spanish, you would say:
¿Cuál es tu número de teléfono?
This phrase is broken down as follows:
- ¿Cuál – Which
- es – is
- tu – your
- número de teléfono – telephone number
The phrase is informal, so it’s typically used with someone you know well, like a friend. If you want to be more formal, perhaps in a business setting, you can say:
¿Cuál es su número de teléfono?
This version uses the formal ‘su’ instead of ‘tu’, making it a respectful way to ask.