IP Address Blacklists are great for short time security events. This information is important for a paper that I am working. It took me a while to find this information again. I actually had to dig into an old email file to get all of the information because typical internet search engines were not providing good results.
Here is a good list of IP addresses and ranges that can be blacklisted to help prevent DOS attacks, etc. Before using this list be sure your organization does not have clients in the below ranges.
Dshield Top 10 Attack IP’s
http://www.dshield.org/top10.php
- 074.052.180.114
- 218.003.209.174
- 211.106.172.081
- 195.068.089.211
- 121.015.253.104
- 218.004.137.213
- 202.062.224.090
- 150.164.029.253
- 058.215.065.237
- 218.006.009.099
Dshield Recommend Block List
http://feeds.dshield.org/block.txt
| Start | End | Country |
| 121.150.29.0 | 121.150.29.255 | |
| 64.80.28.0 | 64.80.28.255 | |
| 81.3.254.0 | 81.3.254.255 | |
| 139.55.62.0 | 139.55.62.255 | US |
| 139.55.82.0 | 139.55.82.255 | US |
| 203.152.123.0 | 203.152.123.255 | NZ |
| 196.22.194.0 | 196.22.194.255 | ZA |
| 139.55.113.0 | 139.55.113.255 | US |
| 81.3.248.0 | 81.3.248.255 | |
| 202.144.113.0 | 202.144.113.255 | IN |
| 139.55.97.0 | 139.55.97.255 | US |
| 121.18.13.0 | 121.18.13.255 | |
| 81.3.250.0 | 81.3.250.255 | |
| 121.18.12.0 | 121.18.12.255 | |
| 139.55.103.0 | 139.55.103.255 | US |
| 74.86.127.0 | 74.86.127.255 | |
| 200.207.155.0 | 200.207.155.255 | BR |
| 206.51.136.0 | 206.51.136.255 | CA |
| 85.88.191.0 | 85.88.191.255 | |
| 217.175.179.0 | 217.175.179.255 |
Asia Pacific Black List
http://www.apnic.net/db/ranges.html#country
- 58.0.0.0/8
- 59.0.0.0/8
- 60.0.0.0/8
- 61.0.0.0/8
- 116.0.0.0/8
- 117.0.0.0/8
- 118.0.0.0/8
- 119.0.0.0/8
- 120.0.0.0/8
- 121.0.0.0/8
- 122.0.0.0/8
- 123.0.0.0/8
- 124.0.0.0/8
- 125.0.0.0/8
- 126.0.0.0/8
- 169.208.0.0/12
- 202.0.0.0/8
- 203.0.0.0/8
- 210.0.0.0/8
- 211.0.0.0/8
- 218.0.0.0/8
- 219.0.0.0/8
- 220.0.0.0/8
- 221.0.0.0/8
- 222.0.0.0/8
InfoSecAlways.com 
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