Who is spamming your blog

91.212.226.0 – 91.212.226.255 – Netdedicated Solutions, Nizhniy Novgorod, Artem Zhirkov – spam
91.214.44. – AltusHost Inc. Luxembourg – spam
92.241.164. – 2×4.ru network Sound & Vision House, Mahe, Seychelles, Pavel Ivanov – spam
92.241.165. – 2×4.ru network Sound & Vision House, Mahe, Seychelles, Pavel Ivanov – spam
92.241.168. – 2×4.ru network Sound & Vision House, Mahe, Seychelles, Pavel Ivanov – spam
92.241.169. – 2×4.ru network Sound & Vision House, Mahe, Seychelles, Pavel Ivanov -spam
94.142.130. – SIA “CSS GROUP” colocation, Latvia – spam
95.79.32.0 – 95.79.39.255 – Network Operation Center CJSC ER-Telecom Company Nizhny Novgorod – spam
109.122. – diverși provideri ex sovietici (Ucraina, Belarus, etc)
117.40.0.0 – 117.43.255.255 – CHINANET Jiangxi province network – spam
188.40.125.9 – TreeWorks LLC
188.92.76. – AD TECHNOLOGY DATACENTER, Latvia, Gundars Arbidans – spam
194.8.74. – Dragonara Alliance Ltd, British Virgin Islands, Andrey Gavrilog – spam
194.8.75. – Dragonara Alliance Ltd, British Virgin Islands, Andrey Gavrilog -spam
195.230.99. – Ukraine Mainstream Llc, Alexandr Dobrorodny – spam
212.235.106. – Herzliyya Netvision hosen_stones, Haifa, Israel – spam
212.235.107. – Herzliyya Netvision hosen_stones, Haifa, Israel – spam
212.117.160.0 – 212.117.175.255 – root eSolutions Luxembourg, Andy BIERLAIR – spam
218.6.0.0 – 218.6.127.255 – China Beijing Chinanet Fujian Province Network

You can ban them with “deny from”.
You can send them an abuse letter(see model below) but in the case of the companies above there is little chance measures will be taken against as some of these companies specialized in hosting spammers.

Hello.
A spammer is using your resources to perform an attack on our server [IP: ]. A legitimate company like yours probably would not approve. The information below should be all you need.
+ [informations from your server log for the reported IP]

PS. This list of spammer hosts was generated from spam logs by extracting IP ranges of repeated offenders on this blog.