All Business ID numbers are 9 digits in the z00 format. All government businesses will start with 200, and since there are 9 digits with a Business ID number, this will mean there will be a need for 3 additional numbers to form a domestic telephone number. This effectively gives the business up to 1,000 telephone numbers. While this is definitely overkill, it assures that the business will have all of the numbers they wish to have. For example, Ka-Tel’s Business ID Number is 200611835. Contacting them will be as simple as dialing +883200611835001 for their customer service line. +883200611835002 is their directory assistance telephone number. All faxes are to +883200611835000. This will give 997 more telephone numbers for board of directors, or regional managers. The possibilities are numerous, and great. No other business can acquire a +883200611835xxx telephone number since this is Ka-Tel’s numbers. Ka-Tel nor any other business will be allowed to lease their numbers to other entities even if they have 997 number left over. They can allow their employees to use their telephone numbers for business related calls. In this regard, it is best for the business to use a telephony server to handle voicemail, and all extensions should be SIP? so everything can work well. The business is responsible for the cost of the phone lines.