/log info "Loading BL ipv4 address list"
/ip firewall address-list remove [/ip firewall address-list find list=BL]
/ip firewall address-list
:do { add address=149.112.20.0/24 list=BL } on-error={}
:do { add address=206.83.45.0/24 list=BL } on-error={}
:do { add address=23.135.232.0/24 list=BL } on-error={}