Phone Number Match Normalizer

The phone number normalizer compares a phone number value in the network message to one or more phone number prefixes specified as normalizer parameters. If the leading digits of the phone number matches one of the specified phone number prefixes, the index associated with that value is used.

You can configure the phone number normalizer to match a phone number based on an exact match or a closest match. For example, you can provide free emergency calls by using an exact match of the emergency number, and you can charge a reduced rate to all numbers in a certain area code by using a closest match on only the area code part of the number. The beginning of each value, from left to right, is used to find the matching normalized value.

The phone number normalizer can match a value stored in a phone number field that contains up to 15 digits, or it can match a value from a string field containing any number of digits. It can match phone number values that include the following characters: *, #, a, b, c, A, B, C, D, or E. For example, matches for a prefix value of 12 could include the following values:
  • 12*#34
  • 12345678901234567890
Note: Although the phone number value to match can contain *, #, a, b, c, A, B, C, D, or E, the specified prefix can contain only the digits 0 to 9.