The fact that a DID number gives you a presence in a specific location through its associated area code can be a big advantage for businesses.
If you want to attract customers in another country, you may face an uphill struggle, as people may not want to pay international call rates in order to reach you – and they may not trust calls from international numbers. However, if you buy a DID number in that country and have all calls routed through to your office PABX, it will appear as if you’re local. Callers to the DID number will then be charged based on the number’s area code; they won’t be charged to forward that call to your real location.
The use of DID numbers can also combat prejudices that may be inadvertently created when certain area codes are perceived as being more valuable than others. Because DID numbers hide your real location, you can lock down a number that appears to originate in a prestigious district, while running your offices in more remote areas where you can access both lower rents and workers whose lower costs of living produce lower wage expectations.
DID numbers are particularly useful for businesses that operate offshore call centers, as they can periodically and automatically switch the destination of calls to a DID number. This makes it possible to forward calls to offices in different time zones at different times of the day, facilitating around-the-clock service without requiring employees to work at night.