how to get recordtype id
RecordTypeId = Schema.SObjectType.Contact.getRecordTypeInfosByName().get('record type name here').getRecordTypeId();
concatenate using string.join Randomizer
Salesforce, Apex
RecordTypeId = Schema.SObjectType.Contact.getRecordTypeInfosByName().get('record type name here').getRecordTypeId();
concatenate using string.join Randomizer