We are the principal provider of fixed-line and mobile telecommunications services in Ireland. The Group provides a comprehensive range of advanced voice, data, broadband and TV services to the residential, small business, enterprise and government markets. The Group also operates the eir Sport channels which we offer as part of our enhanced value bundles to all broadband customers.
Our mobile division operates under the eir Mobile and GoMo brands. In addition, our wholesale division, open eir, is the largest wholesale operator in Ireland, providing products and services to more than 70 national wholesale customers and 25 international wholesale customers, across a range of regulated and unregulated markets.
eir Group revenue for the year ended June 30 2020 was €1.224 billion and Adjusted EBITDA was €600 million. In 2018 we announced the investment of €1 billion over the next five years, of which €500m is to roll out fibre-based services to 1.4 million urban and suburban customers through the deployment of Fibre to the Home ("FTTH") connections. At 30 June 2020, we had passed approximately 2 million premises with fibre, including 576,000 with FTTH, passing approximately 82% of Irish premises and enabling ultrafast broadband speeds of up to 1 Gb/s for our customers.
We are committed to working responsibly. eir recertified for the the Business Working Responsibly mark in 2019, which certifies our policies and practices across our business including ESG & CSR, HR, Environment, Workplace, Marketplace, Diversity & Inclusion, Product Development and Sustainable Procurement.
We are the largest provider of fixed line telecommunications services in Ireland, offering broadband, voice, TV and data services to individual consumers and business users. We also offer wholesale access to our network to other authorised operators ("OAOs").
According to quarterly data published by ComReg (ComReg 20/45), we had a market share for the quarter ended 31 March 2020 of 40% of the Irish fixed line market, based on revenue. We have the most extensive fixed line telecommunications network in Ireland in terms of both capacity and geographic reach, and other network operators therefore rely heavily on our infrastructure. We are also the leading provider of broadband services in Ireland with 459,000 retail lines as of 30 June 2020.
As at 30 June 2020, we had over 1,070,000 fixed line retail and wholesale telephone access lines (excluding wholesale LLU) in service, of which 962,000 (excluding line share) were retail and wholesale broadband customers. As at 30 June, 2019, 80% of our broadband base is on fibre.
We are the third largest mobile operator in Ireland in terms of revenue and customers, operating the eir mobile and GoMo brands. In 2013, eir was the first market with high speed 4G data services in Ireland and eir has achieved an estimated 99% 4G outdoor population coverage in Ireland as at September 2020. In 2019 the Group launched GoMo, a new revolutionary online SIM-only mobile network, as well as Ireland’s largest 5G network, with 5G outdoor population coverage of 29% across 21 towns and cities achieved as at September 2020. As of 30 June 2020, our Mobile division had 1,156,000 customers and we had a share of 17.4% of the Irish mobile market for the quarter ended 31 March 2020, based on number of subscriptions (including mobile broadband and M2M) according to data published by ComReg (ComReg 20/45).