51.91.11.128
Classification: Malicious
51.91.11.128 is a malicious IP address in Roubaix, FR. 57 sightings from 8 threat sources (Proxy, Mail Spammer), last seen 2026-09-24.
Current activity
- Known attacker — Seen launching attacks over the Internet.
- Open proxy — Provides anonymization that can hide an attacker.
Blacklist sightings
| Description | Source | First seen | Last seen | Labels | MITRE ATT&CK |
|---|---|---|---|---|---|
| Anonymizer | FireHOL | 2026-09-24 16:46:34 | 2026-09-24 16:46:34 | anomalous-activity anonymization | |
| Proxy | IPWhois.io | 2025-06-16 01:04:38 | 2026-09-23 00:53:42 | anonymization proxy | |
| Mail Spammer | Barracuda | 2022-12-28 03:23:19 | 2026-09-23 00:53:42 | attacker malicious-activity | |
| Proxy | FireHOL | 2022-12-31 22:43:56 | 2026-09-21 18:04:10 | anomalous-activity anonymization proxy | |
| HTTP Spammer | StopForumSpam.com | 2023-03-26 07:35:06 | 2023-07-27 21:54:50 | malicious-activity | |
| DDoS attack on site kiev.zamok-expert.com.ua | Blocklist.net.ua | 2022-12-28 03:23:18 | 2023-05-29 04:41:02 | malicious-activity | |
| Mail Spammer | Blocklist.de | 2023-01-05 02:19:20 | 2023-01-06 02:19:50 | malicious-activity | |
| IMAP Attacker | Blocklist.de | 2023-01-05 02:11:56 | 2023-01-06 02:12:09 | malicious-activity | |
| Anonymizer | FireHol | 2022-12-29 11:21:22 | 2022-12-29 22:41:31 | anonymization | |
| Mail Spammer | Abuseat.org | 2022-12-28 03:23:19 | 2022-12-28 15:48:31 |
Tags
anonymization bot abuse mail spam attacker imap pop3 saslWhois information
- AS name
- AS16276 OVH SAS
- AS registry
- ripencc
- AS date
- 1993-09-01 00:00:00
- AS CIDR
- 51.91.0.0/16
- CIDR
- 51.91.8.0/22
- Registrant
- OVH SAS
- Address
- 2 rue Kellermann 59100 Roubaix FRANCE
- City
- Roubaix
- Postal code
- 59689 CEDEX 2
- Country
- FR — France 🇫🇷
- Contact email
- [email protected]
- First indexed
- 2022-12-28 03:23:18
- Last updated
- 2026-09-24 16:46:37
Malicious IPs in the same CIDR
51.91.18.151 51.91.141.154 51.91.107.148 51.91.16.32 51.91.76.186 51.91.32.10 51.91.30.80 51.91.253.126 51.91.11.62 51.91.144.39 51.91.151.44 51.91.111.64 51.91.111.160 51.91.109.113 51.91.11.128 51.91.11.141 51.91.148.206