Which of the following is NOT allowed for a barbershop's contact information?

A telephone listing is indeed a standard form of contact information for businesses, including barbershops. It allows customers to reach the shop directly for appointments, inquiries, or services.

In the context of barbershops, it is essential to provide multiple channels for customers to connect with the business, which includes online listings, email contact, and postal addresses. These methods enhance customer service and accessibility.

Choosing a telephone listing as not allowed would be incorrect as it is a common practice in business communication and is expected by customers.