103.203.57.21

Classification: Malicious

103.203.57.21 is a malicious IP address. Reported by 3 threat sources, last seen 2026-08-29. Network: AS136180 Beijing Tiantexin Tech. Co., Ltd..

Current activity

  • Known attacker — Seen launching attacks over the Internet.

Blacklist sightings

Description Source First seen Last seen Labels MITRE ATT&CK
SSH Attacker Blocklist.de 2026-08-19 14:00:04 2026-08-29 14:00:08 attacker malicious-activity
Malicious Host AbuseIPDB 2024-07-01 23:23:53 2026-06-07 22:45:18 compromised malicious-activity
SSH Attacker AbuseIPDB 2024-07-12 03:02:02 2025-06-16 00:30:47 malicious-activity
Bruteforce AbuseIPDB 2024-07-15 05:48:35 2025-06-16 00:07:54 malicious-activity
Port Scanner AbuseIPDB 2024-07-12 02:04:42 2025-06-16 00:04:09 anomalous-activity
Hacking AbuseIPDB 2024-07-12 03:02:02 2025-06-15 19:50:17 malicious-activity
DDoS attack AbuseIPDB 2024-07-12 03:18:35 2025-04-30 12:12:56 malicious-activity
Unauthorized scanning of hosts Blocklist.net.ua 2022-12-28 03:56:36 2025-02-18 21:04:56 malicious-activity
HTTP Attacker AbuseIPDB 2024-07-12 20:55:15 2024-10-29 23:01:05 malicious-activity
HTTP Attacker Blocklist.de 2021-11-23 00:20:50 2021-12-11 01:41:04 malicious-activity

Tags

abuse apache ddos rfi attacker ssh bruteforce bot

Whois information

AS name
AS136180 Beijing Tiantexin Tech. Co., Ltd.
AS registry
apnic
AS date
2015-11-27 00:00:00
AS CIDR
103.203.57.0/24
CIDR
103.203.56.0/22
Registrant
Beijing Tiantexin Tech. Co., Ltd.
Address
Baiziwan Xili, No. 402 - 1706, Chaoyang District, Beijing Beijing 100100
City
Beijing
Postal code
100010
Country
CN — China 🇨🇳
Contact email
[email protected]
First indexed
2021-11-23 00:20:50
Last updated
2026-08-29 14:00:08

Malicious IPs in the same CIDR

103.203.57.24 103.203.57.2 103.203.57.13 103.203.57.16 103.203.57.17 103.203.57.27 103.203.57.28 103.203.57.22 103.203.57.4 103.203.57.10 103.203.57.3 103.203.57.12 103.203.57.21