HomePersonalised Number PlatesOHZ Irish Number Plates have arrived!! Jayne Henry May 24, 2011 Personalised Number Plates We are pleased to announce the arrival of the OHZ Irish Number Plates this morning. The OHZ registrations have replaced the NHZ combination for the Omagh area. An example of an OHZ number would be: To view all our current list of registrations please click on Number Plates.