Phone and Fax Number Validation Information
The following rules are used to validate phone and fax numbers:
- Must be 10 digits or longer
 - Cannot have more than eight sequential digits
 - Cannot have same digit code and exchange code
 - Cannot contain the string 5551212
 - Cannot start with a zero or 1 in the area code
 - Cannot contain a 11 in the second and third digits of the area code, for example, 911
 - Cannot contain seven or more repeated digits
 - Must contain x in the 11th position, if number is longer than 10 digits
 - Must not contain hyphens or special characters