Toll-free numbers start with a very specific scheme that consist of a three-digit code that begins with the number 8 followed by two identical numbers. For example: 800, 833, 844, 855, 866, 877, and 888 are toll-free numbers. 

DID numbers begin with a three-digit area code that designates a specific geographic region and can consist of any number combination. 

Note: DID numbers can begin with the number 8, but are followed by two different numbers. For example, area code 812 for southern Indiana or area code 850 for the Florida panhandle

When porting numbers into Genesys Cloud Voice, there are separate procedures for porting toll-free and DID numbers. To avoid problems, make sure you use the proper procedure for your type of phone numbers.