JavaScript is disabled. Some features of this site may not work properly. For a smoother experience, please enable JavaScript in your browser settings.

AbuseIPDB » 154.51.242.138

154.51.242.138 was found in our database!

This IP was reported 13 times. Confidence of Abuse is 66%: ?

66%

ISP	UCloud Information Technology (HK) Limited
Usage Type	Data Center/Web Hosting/Transit
ASN	AS135377
Domain Name	ucloud.cn
Country	🇺🇸 United States of America
City	Los Angeles, California

IP info including ISP, Usage Type, and Location provided by IPInfo. Updated weekly.

Report 154.51.242.138

Whois 154.51.242.138

IP Abuse Reports for 154.51.242.138:

This IP address has been reported a total of 13 times from 12 distinct sources. 154.51.242.138 was first reported on June 12th 2026, and the most recent report was 5 hours ago.

Recent Reports: We have received reports of abusive activity from this IP address within the last week. It is potentially still actively engaged in abusive activities.

Reporter	IoA Timestamp (UTC)	Comment	Categories
🇨🇦 Dunham Support	2026-06-19 08:39:38 (5 hours ago)	(smtpauth) Failed SMTP AUTH login from 154.51.242.138 (US/United States/-)	Brute-Force
🇧🇷 SvrAdmin	2026-06-18 06:30:34 (1 day ago)	[101] (smtpauth) Failed SMTP AUTH login from 154.51.242.138 (CA/Canada/-): 5 in the last 3600 secs; ... show more [101] (smtpauth) Failed SMTP AUTH login from 154.51.242.138 (CA/Canada/-): 5 in the last 3600 secs; Ports: *; Direction: inout; Trigger: LF_SMTPAUTH; Logs: 2026-06-18 03:29:33 dovecot_login authenticator failed for H=(2P2tCgTobY) [154.51.242.138]:57662: 535 Incorrect authentication data (set_id=vitrola5) 2026-06-18 03:29:41 dovecot_login authenticator failed for H=(5JFfVk) [154.51.242.138]:58824: 535 Incorrect authentication data (set_id=vitrola5) 2026-06-18 03:29:53 dovecot_login authenticator failed for H=(CBein40S3) [154.51.242.138]:64680: 535 Incorrect authentication data (set_id=vitrola5) 2026-06-18 03:30:12 dovecot_login authenticator failed for H=(r9b187Mkl) [154.51.242.138]:50536: 535 Incorrect authentication data (set_id=vitrola5) 2026-06-18 03:30:31 dovecot_login authenticator failed for H=(Khdyl8) [154.51.242.138]:63288: 535 Incorrect authentication data (set_id=vitrola5) show less	Port Scan Hacking Brute-Force Exploited Host
🇩🇪 R.G.	2026-06-17 23:43:47 (1 day ago)	(smtpauth) Failed SMTP AUTH login from 154.51.242.138 (US/United States/-): 5 in the last 900 secs; ... show more (smtpauth) Failed SMTP AUTH login from 154.51.242.138 (US/United States/-): 5 in the last 900 secs; Ports: *; Direction: inout; Trigger: LF_SMTPAUTH; Logs: show less	Brute-Force
🇫🇷 Jean Valjean	2026-06-17 10:54:06 (2 days ago)	Fail2ban exim	Email Spam
🇺🇸 Ghost Rider	2026-06-16 16:16:11 (2 days ago)	RdpGuard detected brute-force attempt on SMTP	Brute-Force
🇨🇿 lp	2026-06-16 13:51:08 (3 days ago)	Email account brute force: 5 attempts were recorded from 154.51.242.138 2026-06-16T15:38:12+02:00 wa ... show more Email account brute force: 5 attempts were recorded from 154.51.242.138 2026-06-16T15:38:12+02:00 warning: unknown[154.51.242.138]: SASL LOGIN authentication failed: authentication failure, [email protected] 2026-06-16T15:38:13+02:00 warning: unknown[154.51.242.138]: SASL LOGIN authentication failed: authentication failure, [email protected] 2026-06-16T15:38:15+02:00 warning: unknown[154.51.242.138]: SASL LOGIN authentication failed: authentication failure, [email protected] 2026-06-16T15:38:17+02:00 warning: unknown[154.51.242.138]: SASL LOGIN authentication failed: authentication failure, [email protected] 2026-06-16T15:38:19+02:00 warning: unknown[154.51.242.138]: SASL LOGIN authentication failed: authentication failure, [email protected] show less	Brute-Force
Anonymous	2026-06-16 13:02:16 (3 days ago)	Blocked by ModSec and CSF	Port Scan
🇵🇾 SecOpsSL	2026-06-16 09:40:31 (3 days ago)	Jun 16 06:40:28 mail postfix/submission/smtpd[62767]: warning: unknown[154.51.242.138]: SASL LOGIN a ... show more Jun 16 06:40:28 mail postfix/submission/smtpd[62767]: warning: unknown[154.51.242.138]: SASL LOGIN authentication failed: authentication failure show less	Email Spam Brute-Force
🇩🇪 grassau.com	2026-06-16 07:52:46 (3 days ago)	(smtpauth) Failed SMTP AUTH login from 154.51.242.138 (US/United States/California/Los Angeles/-)	Brute-Force
🇨🇿 lp	2026-06-13 09:21:00 (6 days ago)	Email account brute force: 5 attempts were recorded from 154.51.242.138 2026-06-13T09:44:25+02:00 wa ... show more Email account brute force: 5 attempts were recorded from 154.51.242.138 2026-06-13T09:44:25+02:00 warning: unknown[154.51.242.138]: SASL LOGIN authentication failed: authentication failure, [email protected] 2026-06-13T09:44:27+02:00 warning: unknown[154.51.242.138]: SASL LOGIN authentication failed: authentication failure, [email protected] 2026-06-13T09:44:29+02:00 warning: unknown[154.51.242.138]: SASL LOGIN authentication failed: authentication failure, [email protected] 2026-06-13T09:44:31+02:00 warning: unknown[154.51.242.138]: SASL LOGIN authentication failed: authentication failure, [email protected] 2026-06-13T09:44:33+02:00 warning: unknown[154.51.242.138]: SASL LOGIN authentication failed: authentication failure, [email protected] show less	Brute-Force
🇩🇪 swehosting.se	2026-06-12 22:32:41 (6 days ago)	(smtpauth) Failed SMTP AUTH login from 154.51.242.138 (CA/Canada/-): 5 in the last 3600 secs; Ports: ... show more (smtpauth) Failed SMTP AUTH login from 154.51.242.138 (CA/Canada/-): 5 in the last 3600 secs; Ports: *; Direction: inout; Trigger: LF_SMTPAUTH; Logs: Jun 13 00:31:56 webb postfix/smtpd[6919]: warning: unknown[154.51.242.138]: SASL LOGIN authentication failed: UGFzc3dvcmQ6 Jun 13 00:32:03 webb postfix/smtpd[6919]: warning: unknown[154.51.242.138]: SASL LOGIN authentication failed: UGFzc3dvcmQ6 Jun 13 00:32:15 webb postfix/smtpd[6919]: warning: unknown[154.51.242.138]: SASL LOGIN authentication failed: UGFzc3dvcmQ6 Jun 13 00:32:26 webb postfix/smtpd[6919]: warning: unknown[154.51.242.138]: SASL LOGIN authentication failed: Connection lost to authentication server Jun 13 00:32:37 webb postfix/smtpd[6919]: warning: unknown[154.51.242.138]: SASL LOGIN authentication failed: Connection lost to authentication server show less	Port Scan
🇳🇱 Alboweb B.V.	2026-06-12 12:11:58 (1 week ago)	SMTP brute-force detected by Fail2Ban in plesk-postfix jail	Email Spam Brute-Force
Anonymous	2026-06-12 08:18:13 (1 week ago)	BruteForce IMAP/POP3/SMTP	Brute-Force

Showing 1 to 13 of 13 reports

Think this IP has been falsely reported? You may request to have the associated reports reviewed and removed. Request Takedown 🚩

Recently Reported IPs:

🇺🇸 216.218.206.77

🇲🇲 202.165.84.176

🇨🇳 125.124.63.31

🇮🇳 103.57.184.134

🇺🇸 65.49.1.179

🇳🇱 45.148.10.157

🇨🇳 211.154.22.152

🇮🇳 203.192.232.180

🇬🇧 185.247.137.20

🇮🇹 93.146.170.93

🇺🇸 82.22.101.150

🇩🇪 69.5.169.115

🇺🇸 66.132.172.237

🇱🇹 45.227.254.170

🇨🇳 36.44.216.30

🇮🇩 34.128.77.56

🇹🇭 184.22.138.67

🇮🇩 180.252.147.158

🇺🇸 162.216.149.94

🇺🇸 162.216.149.58