Phone Number of 
O2 Landline Ireland is 
+353-61-203-501, 1850-60-1747, O2 Mobile User Dial: 1909 .
O2 is a leading telecommunications brand marketed by Telefónica Ireland. The company provides a huge range of broadband Internet and communication services throughout the Ireland. Apart from this,
 O2 also gives 2G and
 3G network services in the country. It offers services to individuals and small, medium, large sized business customers. The company serves more than 1.5 million clients across its service areas. The company was formerly known as Esat Digifone. It was introduced in the year of 1996 in Dublin, Ireland. In the year 2000, Esat Digifone was purchased by British Telecom. The company was emerged as O2 Group in the year 2002 and is based with corporate headquarters in Sir John Rogerson's Quay, Dublin, Ireland.
Telefónica
 O2 Ireland provides following types of services such as fixed line telephony, landlines telephony, broadband Internet, fiber, managed WAN, leased lines, business Wi-Fi, as well as solutions like ICT and cloud solutions.
 
O2 Landline Ireland Address 
The address of O2 Landline Ireland is 28-29 Sir John Rogerson's Quay, Dublin 2, Ireland.
O2 Landline Ireland Website 
The Website of O2 Landline Ireland is 
www.o2online.ie.
O2 Landline Ireland Customer Support Service Phone Number 
The customer support phone number of O2 Landline Ireland is 
+353-61-203-501, 1850-60-1747, O2 Mobile User Dial: 1909 (Click phone number to call).
The postal and 
official address, email address and 
phone number (
helpline) of 
O2 Landline Ireland Service Center and 
O2 Landline Ireland customer care number  is given below. The  
helpline of O2 Landline Ireland customer care number may or may not be 
toll free.
Click Here To View O2 Landline Ireland Customer Care Numbers