There were 1 tests conducted on bt4.pl's availability in the 2 161 days after March 7, 2019. On 1 occasions throughout conducted checks, bt4.pl operated successfully, affirming its most recent uptime on March 7, 2019, with a code 200. Inspections carried out as of February 4, 2025, showed bt4.pl faced no occurrences of inoperability. Of all the replies received, as of February 4, 2025, any response was not indicated as having an error status. Data indicates bt4.pl responded in 0.282 seconds on March 7, 2019, against its 0.282 seconds average.