IP Address: 121.188.250.140

Threat level: 7%

Attack count: 35

Country: South Korea

Region: Jeju-do

City: Jeju-do

ASN: 4766

ISP: Korea Telecom

Net Block: 121.187.86.0-121.189.166.255

Domain name: kt.com

Abuse contact: [email protected]

Stats (UTC)

Last 60 Minutes
Last 24 Hours
Last 30 days
Last 12 months

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Recent submissions

Reported by

Timestamp

Notes

Flags

System

✅ Anonymous

11 hours ago

Real-time Intercept: SMTP attack. Reference: 2026-07-23 17:49:40.3895 Login failure: 121.188.250.140 SMTP

BruteForce, Hacking

SMTP

✅ Tesi Supporto

8 days ago

fail2ban

BruteForce

tesi_postfix-auth

✅ Tim Walker

10 days ago

ipban 1.8.0 - LogonDenied

BruteForce

MSExchangeLogs

✅ Anonymous

13 days ago

ipbanpro 5.0.0 - Invalid Username or Password

BruteForce

MailEnable

✅ Tim Walker

13 days ago

ipban 1.8.0 - LogonDenied

BruteForce

MSExchangeLogs

✅ Tim Walker

20 days ago

ipban 1.8.0 - LogonDenied

BruteForce

MSExchangeLogs

✅ Tim Walker

23 days ago

ipban 1.8.0 - LogonDenied

BruteForce

MSExchangeLogs

✅ Gordon

24 days ago

ipban 2.0.0

BruteForce

SMTP

✅ Tesi Supporto

26 days ago

fail2ban

BruteForce

tesi_postfix-auth

✅ Gordon

29 days ago

ipban 2.0.0

BruteForce

SMTP

✅ Anonymous

2 months ago

Real-time Intercept: SMTP attack. Reference: 2026-05-22 18:22:02.0944 Login failure: 121.188.250.140 SMTP

BruteForce

SMTP

✅ Tim Walker

2 months ago

ipban 1.8.0 - LogonDenied

BruteForce

MSExchangeLogs