A Direct Inward Dial (DID) number is a telephone number that allows callers from outside an organization to dial directly to an individual extension or department within the organization's private branch exchange (PBX) system. Each extension or department is assigned its own unique phone number, enabling callers to bypass the receptionist or auto attendant and directly reach their intended recipient. DID numbers can provide a more efficient and streamlined calling experience for customers and other external parties, allow businesses to track and analyze call data, and allocate call costs more accurately. These numbers are provided by telecommunications service providers and can be configured to work with a wide range of PBX systems and other telephony solutions. Halloo can provide local and toll-free DID numbers for individual extensions or groups.