187.21.12.98
Classification: Malicious
187.21.12.98 is a malicious IP address. Reported by 3 threat sources, last seen 2026-09-02. Network: AS28573 Claro NXT Telecomunicacoes Ltda.
Current activity
- Known attacker — Seen launching attacks over the Internet.
Blacklist sightings
| Description | Source | First seen | Last seen | Labels | MITRE ATT&CK |
|---|---|---|---|---|---|
| Malicious Host | CIArmy | 2026-08-05 20:03:12 | 2026-09-02 20:03:37 | attacker malicious-activity | |
| ET CINS Active Threat Intelligence Poor Reputation IP UDP | Emerging Threats | 2026-08-07 09:16:22 | 2026-09-02 09:15:26 | malicious-activity | |
| ET CINS Active Threat Intelligence Poor Reputation IP TCP | Emerging Threats | 2026-08-07 09:16:21 | 2026-09-02 09:15:24 | malicious-activity | |
| Mail Spammer | Barracuda | 2026-08-05 20:03:14 | 2026-08-05 20:03:14 | attacker malicious-activity |
Whois information
- AS name
- AS28573 Claro NXT Telecomunicacoes Ltda
- Registrant
- Claro NXT Telecomunicacoes Ltda
- City
- Recife
- Postal code
- 50040
- Country
- BR — Brazil 🇧🇷
- First indexed
- 2026-08-05 20:03:12
- Last updated
- 2026-09-02 20:03:37