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There are a few ways to make sure an address is legitimate, sometimes the address is correct but incorrect spellings and abbreviations are being used. Some ways to check the address are using the following sites:
{+}http://www.melissadata.com/lookups/AddressCheck.asp+
{+}https://www.ups.com/address_validator/validate+
{+}https://tools.usps.com/go/zip-code-lookup.htm+
If it is found that the address appears to be different in one of the above sites with spelling or abbreviations, try using the corrected address in the Back Office to see if it will provision. If the address still will not provision, open a trouble ticket with Support and a ticket will be created with VoIP Innovations E911 carrier to get the address whitelisted.