/log info "Loading NU ipv4 address list"
/ip firewall address-list remove [/ip firewall address-list find list=NU]
/ip firewall address-list
:do { add address=202.59.4.0/22 list=NU } on-error={}
:do { add address=49.156.48.0/22 list=NU } on-error={}