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AbuseIPDB » 112.169.152.4

112.169.152.4 was found in our database!

This IP was reported 105 times. Confidence of Abuse is 27%: ?

27%

ISP	(ju)aiosiseu
Usage Type	Fixed Line ISP
ASN	AS4766
Hostname(s)	mail.iosystem.co.kr iosystem.co.kr
Domain Name	kt.com
Country	🇰🇷 Korea (the Republic of)
City	Seoul, Seoul

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

Report 112.169.152.4

Whois 112.169.152.4

IP Abuse Reports for 112.169.152.4:

This IP address has been reported a total of 105 times from 42 distinct sources. 112.169.152.4 was first reported on July 12th 2021, and the most recent report was 2 days 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
🇮🇹 VHosting	2026-07-11 19:55:08 (2 days ago)	Detected mail brute force attack from 4 different servers	Brute-Force
🇨🇭 mfb	2026-07-04 18:11:00 (1 week ago)	From: Alina <[email protected]>; Received: from mail.iosystem.co.kr (iosystem.co.kr [112.169.152. ... show more From: Alina <[email protected]>; Received: from mail.iosystem.co.kr (iosystem.co.kr [112.169.152.4]); Sat, 4 Jul 2026 12:55:33 -0400 (EDT) show less	Email Spam
🇦🇹 joe-abuse	2026-06-20 01:34:24 (3 weeks ago)	Automated report from fail2ban on mail.fitzgerald.eu. Jail: postfix. First seen: 2026-06-18 02:30:02 ... show more Automated report from fail2ban on mail.fitzgerald.eu. Jail: postfix. First seen: 2026-06-18 02:30:02. Events: 19. Reported by ipdb-security/fitzgerald.eu show less	Email Spam
🇦🇹 joe-abuse	2026-06-18 01:40:57 (3 weeks ago)	Automated report from fail2ban on mail.fitzgerald.eu. Jail: postfix. First seen: 2026-06-16 11:25:46 ... show more Automated report from fail2ban on mail.fitzgerald.eu. Jail: postfix. First seen: 2026-06-16 11:25:46. Events: 18. Reported by ipdb-security/fitzgerald.eu show less	Email Spam
🇨🇦 mfb	2026-06-16 13:19:00 (4 weeks ago)	From: Tamari <[email protected]>; Received: from mail.iosystem.co.kr (iosystem.co.kr [112.169.152 ... show more From: Tamari <[email protected]>; Received: from mail.iosystem.co.kr (iosystem.co.kr [112.169.152.4]); Tue, 16 Jun 2026 06:29:01 -0400 (EDT) show less	Email Spam
🇦🇹 joe-abuse	2026-06-02 18:29:13 (1 month ago)	2026-06-02T19:59:05.357499+02:00 ucs1 postfix/smtpd[214221]: NOQUEUE: reject: RCPT from iosystem.co. ... show more 2026-06-02T19:59:05.357499+02:00 ucs1 postfix/smtpd[214221]: NOQUEUE: reject: RCPT from iosystem.co.kr[112.169.152.4]: 550 5.1.1 <[email protected]>: Recipient address rejected: User unknown in virtual mailbox table; from=<[email protected]> to=<[email protected]> proto=ESMTP helo=<mail.iosystem.co.kr> 2026-06-02T20:29:13.193973+02:00 ucs1 postfix/smtpd[215119]: NOQUEUE: reject: RCPT from iosystem.co.kr[112.169.152.4]: 550 5.1.1 <[email protected]>: Recipient address rejected: User unknown in virtual mailbox table; from=<> to=<[email protected]> proto=ESMTP helo=<mail.iosystem.co.kr> ... show less	Email Spam
🇩🇪 vereinshosting	2026-06-02 17:07:45 (1 month ago)	SPAM email (score: 17.500149)	Email Spam
🇩🇪 kmedv.net	2026-06-02 16:39:28 (1 month ago)	Spam detected by rspamd. Score: 123.98	Email Spam
🇨🇭 Origon	2026-06-02 15:26:16 (1 month ago)	NOQUEUE - IP: 112.169.152.4 - Jun 2 17:26:15 plesk postfix/smtpd[1114018]: NOQUEUE: reject: RCPT fr ... show more NOQUEUE - IP: 112.169.152.4 - Jun 2 17:26:15 plesk postfix/smtpd[1114018]: NOQUEUE: reject: RCPT from iosystem.co.kr[112.169.152.4]: 554 5.7.1 Service unavailable; Client host [112.169.152.4] blocked using dnsbl-2.uceprotect.net; Net 112.160.0.0/12 is UCEPROTECT-Level2 listed because 1285 impacts are seen from KIXS-AS-KR Korea Telecom, KR/AS4766 there. See: http://www.uceprotect.net/rblcheck.php?ipr=112.169.152.4; from=<REDACTED@REDACTED> to=<REDACTED@REDACTED> proto=ESMTP helo=<mail.iosystem.co.kr> show less	Email Spam
🇨🇭 Origon	2026-05-07 16:43:55 (2 months ago)	NOQUEUE - IP: 112.169.152.4 - May 7 18:43:55 plesk postfix/smtpd[600846]: NOQUEUE: reject: RCPT fro ... show more NOQUEUE - IP: 112.169.152.4 - May 7 18:43:55 plesk postfix/smtpd[600846]: NOQUEUE: reject: RCPT from iosystem.co.kr[112.169.152.4]: 554 5.7.1 Service unavailable; Client host [112.169.152.4] blocked using dnsbl-2.uceprotect.net; Net 112.160.0.0/12 is UCEPROTECT-Level2 listed because 1239 impacts are seen from KIXS-AS-KR Korea Telecom, KR/AS4766 there. See: http://www.uceprotect.net/rblcheck.php?ipr=112.169.152.4; from=<REDACTED@REDACTED> to=<REDACTED@REDACTED> proto=ESMTP helo=<35811.com> show less	Email Spam
🇮🇹 VHosting	2026-02-15 17:59:43 (4 months ago)	Detected mail brute force attack from 4 different servers	Brute-Force
🇺🇸 DiodeDave	2025-07-28 23:44:37 (11 months ago)	Attempted access after blacklisting	Email Spam
Anonymous	2025-01-04 20:39:50 (1 year ago)	Ports: 25,465,587; Direction: 0; Trigger: LF_DISTATTACK	Brute-Force SSH
Anonymous	2025-01-02 15:46:20 (1 year ago)	Ports: 25,465,587; Direction: 0; Trigger: LF_DISTATTACK	Brute-Force SSH
🇩🇪 dihost	2024-12-30 23:56:00 (1 year ago)	(smtpauth) Failed SMTP AUTH login from 112.169.152.4 (KR/South Korea/iosystem.co.kr): 5 in the last ... show more (smtpauth) Failed SMTP AUTH login from 112.169.152.4 (KR/South Korea/iosystem.co.kr): 5 in the last 3600 secs show less	Brute-Force

Showing 1 to 15 of 105 reports

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