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AbuseIPDB » 221.138.172.189

221.138.172.189 was found in our database!

This IP was reported 84 times. Confidence of Abuse is 100%: ?

100%

ISP	SK Broadband Co Ltd
Usage Type	Fixed Line ISP
ASN	AS9318
Domain Name	skbroadband.com
Country	🇰🇷 Korea (the Republic of)
City	Gimpo-si, Gyeonggi-do

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

Report 221.138.172.189

Whois 221.138.172.189

IP Abuse Reports for 221.138.172.189:

This IP address has been reported a total of 84 times from 69 distinct sources. 221.138.172.189 was first reported on September 13th 2026, and the most recent report was 14 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
Anonymous	2026-09-17 16:30:29 (14 hours ago)	Failed login attempt detected by Fail2Ban in plesk-postfix jail	Brute-Force
🇺🇦 MakselPr	2026-09-17 13:16:24 (17 hours ago)	Sep 17 13:27:34 mail postfix/smtps/smtpd[2935783]: warning: unknown[221.138.172.189]: SASL LOGIN aut ... show more Sep 17 13:27:34 mail postfix/smtps/smtpd[2935783]: warning: unknown[221.138.172.189]: SASL LOGIN authentication failed: (reason unavailable), sasl_username=dancer_crow Sep 17 16:16:20 mail postfix/smtps/smtpd[2945069]: warning: unknown[221.138.172.189]: SASL LOGIN authentication failed: (reason unavailable), [email protected] ... show less	Brute-Force
Anonymous	2026-09-17 13:14:46 (17 hours ago)	IMAP password guessing	Brute-Force
🇺🇸 MSchienle	2026-09-17 13:13:04 (17 hours ago)	Sep 17 08:12:34 customvisuals postfix/smtpd[37770]: warning: unknown[221.138.172.189]: SASL LOGIN au ... show more Sep 17 08:12:34 customvisuals postfix/smtpd[37770]: warning: unknown[221.138.172.189]: SASL LOGIN authentication failed: UGFzc3dvcmQ6 show less	Email Spam
🇩🇪 Paul Smith	2026-09-17 12:40:52 (18 hours ago)	Email Auth Brute force attack 4/4 in last day	Brute-Force
🇫🇷 adlp.org	2026-09-17 12:26:41 (18 hours ago)	Sep 17 12:26:31 nginx-mua ==smtp/[email protected]== : TRAKEUR-Out;0;127.0.0.1;221.138.172.189;[UN ... show more Sep 17 12:26:31 nginx-mua ==smtp/[email protected]== : TRAKEUR-Out;0;127.0.0.1;221.138.172.189;[UNAVAILABLE];[email protected];smtp;plain;1;@adlp.org$;KILL;2;Licence to kill Sep 17 12:26:34 nginx-mua ==smtp/[email protected]== : TRAKEUR-Out;0;127.0.0.1;221.138.172.189;[UNAVAILABLE];[email protected];smtp;plain;1;@adlp.org$;KILL;2;Licence to kill Sep 17 12:26:37 nginx-mua ==smtp/[email protected]== : TRAKEUR-Out;0;127.0.0.1;221.138.172.189;[UNAVAILABLE];[email protected];smtp;plain;1;@adlp.org$;KILL;2;Licence to kill ... show less	Brute-Force
🇷🇴 clauss	2026-09-17 11:44:57 (19 hours ago)	IP reached maximum auth failures for a one day block	Brute-Force
Anonymous	2026-09-17 10:59:09 (19 hours ago)	2026-09-17T13:59:08.030338+03:00 shell.l3.fi postfix/smtps/smtpd[662039]: warning: unknown[221.138.1 ... show more 2026-09-17T13:59:08.030338+03:00 shell.l3.fi postfix/smtps/smtpd[662039]: warning: unknown[221.138.172.189]: SASL LOGIN authentication failed: UGFzc3dvcmQ6, sasl_username=kivi16 2026-09-17T13:59:08.411281+03:00 shell.l3.fi postfix/smtps/smtpd[662039]: disconnect from unknown[221.138.172.189] ehlo=1 auth=0/1 commands=1/2 ... show less	Email Spam Brute-Force
Anonymous	2026-09-17 10:25:15 (20 hours ago)	2026-09-17T11:25:14.470582+01:00 [masked] postfix/smtps/smtpd[1690140]: warning: unknown[221.138.172 ... show more 2026-09-17T11:25:14.470582+01:00 [masked] postfix/smtps/smtpd[1690140]: warning: unknown[221.138.172.189]: SASL LOGIN authentication failed: (reason unavailable), sasl_username=oreillynetcom@[masked] ... show less	Brute-Force
🇯🇵 ki3	2026-09-17 09:28:43 (21 hours ago)	Fail2Ban: Postfix Attack 221.138.172.189 1789637322.0(JST)	Email Spam Brute-Force
🇮🇩 aaKenshin	2026-09-17 08:32:21 (22 hours ago)	Suspicious activity detected from IP 221.138.172.189 based on mailserver logs. Sample logs: 2026-09- ... show more Suspicious activity detected from IP 221.138.172.189 based on mailserver logs. Sample logs: 2026-09-17 15:54:51,325 INFO [qtp2102534528-447527] [ip=172.16.0.182;oip=221.138.172.189;oport=47376;oproto=smtp;port=40610;soapId=3665dc04;] account - Error occurred during authentication: authentication failed for []. Reason: account not found. 2026-09-17 15:54:51,325 INFO [qtp2102534528-447527] [ip=172.16.0.182;oip=221.138.172.189;oport=47376;oproto=smtp;port=40610;soapId=3665dc04;] SoapEngine - handler exception: authentication failed for [], account not found 2026-09-17 15:54:51,325 INFO [qtp2102534528-447527] [ip=172.16.0.182;oip=221.138.172.189;oport=47376;oproto=smtp;port=40610;soapId=3665dc04;] soap - AuthRequest elapsed=1 2026-09-17 16:32:20,678 INFO [qtp2102534528-447736] [name=*@.id;ip=172.16.0.182;oip=221.138.172.189;oport=35611;oproto=smtp;port=41688;soapId=3665dc74;] SoapEngine - handler exception: authentication failed for [**], LDAP error: - unable to ldap authenticat show less	Brute-Force
🇫🇷 dwmp	2026-09-17 08:10:25 (22 hours ago)	Sep 17 08:20:38 webcore postfix/smtpd[306556]: warning: unknown[221.138.172.189]: SASL LOGIN authent ... show more Sep 17 08:20:38 webcore postfix/smtpd[306556]: warning: unknown[221.138.172.189]: SASL LOGIN authentication failed: authentication failure Sep 17 09:15:45 webcore postfix/smtpd[321885]: warning: unknown[221.138.172.189]: SASL LOGIN authentication failed: authentication failure Sep 17 10:10:24 webcore postfix/smtpd[337063]: warning: unknown[221.138.172.189]: SASL LOGIN authentication failed: authentication failure ... show less	Brute-Force
Anonymous	2026-09-17 07:25:02 (23 hours ago)	Brute Force User Attack SMTP	Brute-Force
🇩🇪 Ilop	2026-09-17 06:48:27 (1 day ago)	[mail.il] Sep 17 06:48:25 mailhost postfix/postscreen[6840]: DNSBL rank 2 for [221.138.172.189]:3555 ... show more [mail.il] Sep 17 06:48:25 mailhost postfix/postscreen[6840]: DNSBL rank 2 for [221.138.172.189]:35558 ... show less	Email Spam
🇩🇪 mnpx	2026-09-17 06:28:54 (1 day ago)	SMTP brute forcing (3× over 5h:03m); first seen here 2026-09-17T01:26Z	Brute-Force

Showing 1 to 15 of 84 reports

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