BT's fibre broadband now covers 80% of the UK, with the service available to more than 23 million premises.
Of BT's 7,798,000 broadband subscribers, 3,226,000 are on the BT Infinity fibre broadband option, which is a quarterly rise of 217,000, and follows the 266,000 added in Q1.
In the last quarter, the company also recorded 389,000 fibre broadband net connections through BT Openreach, which is utilised by the likes of Sky and TalkTalk as well as BT Infinity customers.
This is an increase of 14% on Q1 and brings the number of homes and businesses connected to around 4.6 million.
According to the company, it has increased its base-case assumption to 28% fibre penetration, with 30% in Broadband Delivery UK areas, although BT is keen to point out it will be "many years" before it recovers its investment.
"We also have 3.2 million retail fibre broadband customers, having added 217,000 this quarter. And the UK broadband market grew by 149,000, of which our share was 85,000, or 57%," the provider added.
BT Chief Executive Gavin Patterson said it is an exciting time at BT, which is continuing to "invest heavily" in the UK's superfast fibre broadband network.
"It now reaches around 80% of all UK premises and we will work with government to help take fibre broadband to 95% of the country by the end of 2017," he added.
"Our technical trials of ultrafast broadband using G.fast are progressing well; we’re on target to start large-scale customer trials this summer."