bl.ofdoom.com

bl.ofdoom.com is an automated real time blocking list generated from attempts to email nonexistent accounts, on a few domains.

It follows these rules:

• Each attempt to email a nonexistent address adds one point to the /24 net block containing the offending IP address.
• When the score for a net block is greater than 15, that /24 block gets added to the block list.
• When the score for a net block has not increased for 8 hours, one point is taken away every hour.
• When the score drops below 15, the /24 block is removed from the block list.

The block list can be queried via dns from rbl.ofdoom.com, in the usual manner for an ip based blocklist.

Currently there are 121 blocks on the list.

45.0.0.0/8 matches the net block 45.55.37.0/24

It appears to be announced by AS14061 (DIGITALOCEAN-ASN - DigitalOcean, LLC, US)

The last activity was around 2026-07-19 11:00:00-07

It is currently blocked, with a score of 2406. It will be unblocked in about 101 days.

45.0.0.0/8 matches the net block 45.118.144.0/24

It appears to be announced by AS131414 (LVSOFT-AS-VN - Long Van Soft Solution JSC, VN)

The last activity was around 2026-09-18 14:00:00-07

It is currently blocked, with a score of 898. It will be unblocked in about 38 days.

45.0.0.0/8 matches the net block 45.134.26.0/24

It appears to be announced by AS48207 (GLBBULUTTEKNOLOJISI-AS - GLB Bulut Teknolojisi Limited Sirketi, TR)

The last activity was around 2025-12-17 10:00:00-08

It is currently blocked, with a score of 19347. It will be unblocked in about 807 days.

45.0.0.0/8 matches the net block 45.135.232.0/24

The last activity was around 2025-12-20 14:00:00-08

It is currently blocked, with a score of 18764. It will be unblocked in about 782 days.

45.0.0.0/8 matches the net block 45.140.17.0/24

It appears to be announced by AS201414 (DELTA-ELECTRONICS - OOO "DELTA-ELECTRONICS", RU)

The last activity was around 2026-01-11 21:00:00-08

It is currently blocked, with a score of 19290. It will be unblocked in about 804 days.

45.0.0.0/8 matches the net block 45.148.10.0/24

It appears to be announced by AS48090 (DMZHOST - TECHOFF SRV LIMITED, GB)

The last activity was around 2026-03-10 00:00:00-07

It is currently blocked, with a score of 43359. It will be unblocked in about 1807 days.

45.0.0.0/8 matches the net block 45.205.24.0/24

It appears to be announced by AS402506 (ZENIX - Zenixcloud, US)

The last activity was around 2026-08-28 11:00:00-07

It is currently blocked, with a score of 107. It will be unblocked in about 5 days.

To check if an address is blocked, enter it here: