Dennis, I ran a test of the factory installed cluster list. Here are the only ones still showing as valid, thought you could use this. None of the rest were found.
73 Doug W5GA
6L0NJ DXC.DX.OR.KR found
CS1SEL-5 HAMRADIO.ISEL.IPL.PT:41112 found
DB0LJ-6 DB0LJ.DYNDNS.ORG:41112 found
EI3IO SHANDX.ATH.CX:5000 found
EI7MRE MAYODX.ATH.CX:7300 found
GB7BAA GB7BAA.COM:7300 found
GB7DGK GB7DJK.DXCLUSTER.NET:7300 found
GB7DXA NT.AMERSHAM.NET:7300 found
GB7MBC GB7MBC.SPOO.ORG:8000 found
HA6DX DX.HU:9000 found
IK4ICZ-6 IK4ICZ.DYNDNS.ORG:8000 found
IT9OBK-6 IT9OBK.ORG:41112 found
IW5ECF-6 HAM.HOMELINUX.ORG:8000 found
IZ8BRI-6 IZ8BRI.DYNDNS.ORG:9000 found
JG1VGX-9 DXC.JG1VGX.NET:7300 found
JH1RFM-9 JH1RFM.DDO.JP:8000 found
K1EU K1EU.DYNIP.COM found
K2LS DXC.K2LS.COM found
K7AR K7AR.NET:7300 found
K8AZ K8AZ.NO-IP.COM found
KN2M KN2M.D2G.COM found
N2KI DXC.N2KI.COM:7300 found
N5IN DXSPOTS.COM found
N5IN DXSPOTS.NET found
N7OD N7OD.PENTUX.NET found
N9MW
WWW.N9MW.COM found
OK0DXI RADIO.NAGANO.CZ:41112 found
PA1RBZ PA1RBZ.DYNDNS.ORG:9000 found
RW3XA-8 DX.OBNINSK.ORG:8000 found
S50DXS S50DXS.ODS.ORG:8000 found
SM4ONW-7 CLUSTER.SK4BW.NET:8000 found
SM7GVF-6 SM7GVF.DYNDNS.ORG:3692 found
VA3MW-7 VA3MW.HOMEIP.NET:41112 found
VE3CGR-5 VE3CGR-LINUX.DYNDNS.ORG:7300 found
VE6DXC DXC.MIDDLEBROOK.CA:8000 found
VE7CC DXC.VE7CC.NET found
W1AAA DXUSA.NET:7300 found
W1NR DXC.W1NR.NET found
W3LPL DXC.W3LPL.NET found
W6KK W6KK.ZAPTO.ORG:7300 found
W6RFU 128.111.56.240:7300 found
73 Doug W5GA