| Property | Value |
| mail-abuse@cert.br |
| Date | IP Address |
| 2013-06-29 | 209.8.115.86 (ClassC) |
| 2013-12-03 | 198.47.108.66 (ClassC) |
| 2013-12-11 | 205.234.218.211 (ClassC) |
| 2014-01-08 | 157.238.74.26 (ClassC) |
| 2014-02-13 | 216.156.225.51 (ClassC) |
| 2014-02-13 | 72.246.55.27 (ClassC) |
| 2014-03-29 | 216.156.249.59 (ClassC) |
| 2014-04-22 | 209.107.205.105 (ClassC) |
| 2014-04-30 | 209.211.216.169 (ClassC) |
| 2014-05-07 | 96.6.46.11 (ClassC) |
| 2014-05-14 | 165.254.206.26 (ClassC) |
| 2014-06-30 | 63.216.54.185 (ClassC) |
| 2014-07-18 | 216.206.30.11 (ClassC) |
| 2014-09-16 | 165.254.206.239 (ClassC) |
| 2014-11-04 | 207.152.124.73 (ClassC) |
| 2014-11-06 | 107.14.32.57 (ClassC) |
| 2015-01-09 | 173.205.10.49 (ClassC) |
| 2015-01-15 | 173.205.10.82 (ClassC) |
| 2015-02-19 | 207.152.124.50 (ClassC) |
| 2015-04-15 | - |
| 2015-04-26 | 184.51.147.148 (ClassC) |
| 2016-10-28 | 65.152.202.114 (ClassC) |
| 2017-07-02 | 173.222.148.32 (ClassC) |
| 2017-11-02 | 23.229.113.42 (ClassC) |
| 2024-09-24 | 104.16.78.72 (ClassC) |
| 2024-11-26 | 104.16.77.72 (ClassC) |
| 2025-07-06 | 104.18.10.139 (ClassC) |
| 2025-08-03 | 104.18.11.139 (ClassC) |
| Date | Domain | IP |
| bc.ef.com.br | 2022-03-01 | 108.156.120.114 |
| m.ef.com.br | 2013-04-20 | 200.123.198.168 |
| www.ef.com.br | 2015-01-09 | 173.205.10.49 |