Batch script exit code in for loop

setlocal EnableDelayedExpansion

REM declare array
set URL_LIST=(http://192.168.17.102/ http://192.168.17.103/ http://192.168.17.104/ http://192.168.17.105/)


for %%i in %URL_LIST% do (
curl --connect-timeout 2 -kI %%i > NUL 2>&1
REM !errorlevel! instead of %errorlevel%
echo Return exit code !errorlevel!
if errorlevel 1 (
echoj [alert] %%i
) else (
echoj [---ok] %%i
)
)