working nodes you always can find there: http://advance.mn.zone/ by clicking copy button near ADDNODES, if they works of course ;-)
# DNS seeds updated daily with 2 x 24 reachable MasterNode IPs:
addnode=advance.seeds.mn.zone
addnode=advance.mnseeds.com
# Static list of reachable MasterNode IPs:
addnode=167.160.84.159:30888
addnode=149.56.4.252:30888
addnode=159.65.135.91:30888
addnode=185.141.61.25:30888
addnode=75.144.195.68:30888
addnode=144.202.31.160:30888