Below is my current Apache Comment Spam blocklist, please help yourselves. In addition I also use the Spamhaus DROP List at a firewall level to further reduce spam.
2013-03-27
#XSServer.eu Ranges
Deny from 46.251.228.0/23
Deny from 109.230.197.0/24
Deny from 109.230.213.0/24
Deny from 109.230.216.0/23
Deny from 109.230.220.0/22
Deny from 109.230.246.0/24
Deny from 109.230.248.0/23
Deny from 109.230.251.0/24
#End of XSServer.eu Ranges
#Nobis/Ubiquity Ranges
#ARIN Ranges
Deny from 23.19.0.0/16
Deny from 64.120.0.0/17
Deny from 67.201.0.0/21
Deny from 67.201.40.0/24
Deny from 67.201.48.0/23
Deny from 69.147.224.0/23
Deny from 69.174.60.0/22
Deny from 70.32.32.0/20
Deny from 72.37.145.0/24
Deny from 72.37.204.0/24
Deny from 72.37.218.0/23
Deny from 72.37.221.0/24
Deny from 72.37.222.0/23
Deny from 72.37.224.0/21
Deny from 72.37.237.0/24
Deny from 72.37.242.0/23
Deny from 72.37.246.0/23
Deny from 108.62.0.0/16
Deny from 173.208.0.0/17
Deny from 173.234.0.0/16
Deny from 174.34.128.0/18
Deny from 216.6.224.0/20
#RIPE Ranges
Deny from 176.31.50.64/27
#End of Nobis/Ubiquity Ranges
#Balticom.lv Ranges
Deny from 46.23.32.0/20
Deny from 82.193.64.0/19
Deny from 83.99.128.0/17
Deny from 109.73.96.0/20
Deny from 212.142.64.0/18
#End of Balticom.lv Ranges
#Everhost Ranges
Deny from 31.2.216.0/21
Deny from 31.47.208.0/21
Deny from 31.220.128.0/22
Deny from 46.108.155.0/24
Deny from 89.42.8.0/24
Deny from 89.42.108.0/23
Deny from 89.44.16.0/20
Deny from 93.118.64.0/20
Deny from 94.60.152.0/21
Deny from 94.60.160.0/19
Deny from 94.60.192.0/21
Deny from 94.63.0.0/19
Deny from 94.63.32.0/20
Deny from 94.63.56.0/21
Deny from 94.63.64.0/21
Deny from 94.63.128.0/21
Deny from 94.63.152.0/21
Deny from 94.63.192.0/20
Deny from 94.177.4.0/23
Deny from 95.64.24.0/21
Deny from 95.64.32.0/24
Deny from 95.64.41.0/24
Deny from 95.64.42.0/24
Deny from 95.64.110.0/23
Deny from 95.128.168.0/24
Deny from 95.128.174.0/23
Deny from 95.187.0.0/17
Deny from 178.255.36.0/23
Deny from 178.255.38.0/24
Deny from 188.208.0.0/20
Deny from 188.215.0.0/24
Deny from 188.215.32.0/22
Deny from 188.229.19.0/24
Deny from 188.229.20.0/22
Deny from 188.229.38.0/24
Deny from 188.229.103.0/24
Deny from 188.229.104.0/21
Deny from 188.229.124.0/22
Deny from 188.240.36.0/22
Deny from 188.240.160.0/20
Deny from 188.240.192.0/19
Deny from 188.247.128.0/24
Deny from 188.247.228.0/23
#End of Everhost Ranges
#FDC Servers Ranges
Deny from 67.159.0.0/18
Deny from 66.90.64.0/18
Deny from 208.53.128.0/18
Deny from 50.7.0.0/16
Deny from 204.45.0.0/16
Deny from 76.73.0.0/16
Deny from 74.63.64.0/18
#End of FDC Servers Ranges
#Exetel DE Ranges
Deny from 109.230.244.0/23
Deny from 31.214.155.0/24
#End of Exetel DE Ranges
#Virpus Network Operations Ranges
Deny from 50.115.160.0/20
Deny from 173.0.48.0/20
Deny from 199.119.224.0/22
Deny from 199.180.128.0/21
Deny from 208.89.208.0/21
#End of Virpus Network Operations Ranges
#Przedsiebiorstwo Uslug Specjalistycznych ELAN Ranges
Deny from 91.236.74.0/23
#End of Przedsiebiorstwo Uslug Specjalistycznych ELAN Ranges
#FOP Chaliy Igor Petrovich Ranges
Deny from 91.231.40.0/22
#End of FOP Chaliy Igor Petrovich Ranges
#PEG TECH INC Ranges
Deny from 142.0.128.0/20
Deny from 142.4.96.0/19
Deny from 192.74.224.0/19
Deny from 198.200.32.0/19
Deny from 199.180.100.0/22
Deny from 199.188.104.0/21
#End of PEG TECH INC Ranges
#Kyivstar PJSC Ranges
Deny from 5.248.0.0/16
Deny from 46.211.128.0/17
Deny from 46.211.0.0/17
Deny from 46.211.0.0/16
Deny from 46.185.64.0/18
Deny from 46.185.0.0/18
Deny from 46.185.0.0/17
Deny from 46.119.64.0/18
Deny from 46.119.128.0/17
Deny from 46.118.0.0/16
Deny from 37.229.0.0/16
Deny from 37.115.0.0/16
Deny from 81.23.16.0/20
Deny from 94.153.0.0/16
Deny from 109.162.64.0/18
Deny from 109.162.0.0/18
Deny from 109.162.0.0/17
Deny from 134.249.0.0/16
Deny from 178.137.128.0/17
Deny from 178.137.0.0/17
Deny from 178.137.0.0/16
Deny from 176.8.0.0/16
Deny from 193.41.60.0/22
#End of Kyivstar PJSC Ranges
#Xeex Communication Ranges
Deny from 69.26.160.0/19
Deny from 209.159.140.0/23
Deny from 216.151.128.0/19
Deny from 216.152.240.0/20
#End of Xeex Communication Ranges
#Misc Ranges
Deny from 74.63.222.74 #74-222-63-74.static.reverse.lstn.net
Deny from 86.181.176.121 #host86-181-176-121.range86-181.btcentralplus.com
Deny from 98.126.4.202 #vpls.net hosting
Deny from 98.126.251.234 #vpls.net hosting
Deny from 188.168.0.0/16 #TTK Retail
Deny from 81.17.22.21 #Unknown Spammer - NXDOMAIN Returned
Deny from 66.219.17.212 #Unknown Extremely Prolific Spammer - NXDOMAIN Returned
Deny from 46.29.248.0/23 #webexxpurts.com
Deny from 74.221.208.0/20 #DME Hosting LLC
Deny from 109.169.57.204 #Thrust VPS
Deny from 184.22.139.0/24 #Subset of NOC allocated range that appears to have been compromised
Deny from 99.187.246.108 #99-187-246-108.lightspeed.rcsntx.sbcglobal.net
Deny from 195.62.24.0/23 #Megacom Ltd
Deny from 141.105.65.151 #ip-1.you-host.org
Deny from 146.0.74.0/24 #pawn.su
Deny from 194.28.112.0/22 #Specialist ISP
Deny from 159.224.130.96 #96.130.224.159.triolan.net
Deny from 91.201.64.0/24 #Donekoserv Partial Range
Deny from 93.182.0.0/16 #Relakks.com VPN spammers
Deny from 193.0.212.70 #ETICAPRIM SRL
Deny from 176.53.58.0/24 #Whmcsxtra
Deny from 91.237.249.63 #Telecom Tekhpodderzhka Ltd
Deny from 173.213.109.65 #Eonix Corporation
Deny from 193.105.210.0/24 #FOP Budko Dmutro Pavlovuch
Deny from 88.190.37.223 #sd-35481.dedibox.fr
Deny from 5.144.176.0/24 #HSH Network International
#End of Misc Ranges
Thanks man, that $@%*#&@ XSSERVER.EU took 50 mb. of my bandwith with only a few hits, bastards
thanks for your help
Another Nobis range worth adding to the list;
142.91.20.0/22