A landline number is a telephone number associated with a traditional wired phone system. These numbers are typically linked to a physical location, such as a home or office, and use copper or fiber-optic cables to transmit voice signals. Landline phones are known for their reliability and sound quality compared to mobile phones. Landline numbers are often used for personal and business communication. They can be found in telephone directories and are usually assigned by telecommunications companies. While the use of landlines has declined with the rise of mobile phones, they remain important for certain services, such as emergency calls and home security systems.