According to figures published by the regultor CNMC, the number already exceeded 9.6 million in August, growing by almost 122,000 during the month.
Movistar, the leading provider, accounted for 4.2 million, or 44% of the total.
In the year to August, the number of FTTH lines increased by 1.8 million, while the number of DSL lines fell by 1.2 million.
Furtheremore, as of August there were a total of 15 million fixed broadband lines, of which 64% were FTTH.
Movistar accounted for 39.88% of the fixed broadband market, followed by Orange (26.22%), Vodafone (20.91%), Masmovil (7.59%) and other providers (4.40%).