O2, Slovak Telekom lead porting gains in 2025

O2 Slovakia saw the most customers connect to its network in 2025 through number porting, according to figures collected by Zive.sk. O2 gained 10,312 telephone numbers. Slovak Telekom also had a net gain, of 8,171 telephone numbers. Orange Slovakia lost 11,923 telephone numbers through porting, and 4ka lost 6,384 numbers last year as well.