Must be a valid IPv4 or IPv6 ip address, e.g. 127.0.0.1 or 2001:DB8:0:0:8:800:200C:417A
Basic Info

City: unknown

Region: unknown

Country: Germany

Internet Service Provider: unknown

Hostname: unknown

Organization: unknown

Usage Type: unknown

Comments:
No discussion about this IP yet. Click above link to make one.
Comments on same subnet:
No discussion about this subnet yet..
Whois info:
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Dig info:
; <<>> DiG 9.10.3-P4-Ubuntu <<>> 53.194.171.21
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 15603
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;53.194.171.21.			IN	A

;; AUTHORITY SECTION:
.			124	IN	SOA	a.root-servers.net. nstld.verisign-grs.com. 2022013100 1800 900 604800 86400

;; Query time: 19 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Mon Jan 31 18:12:37 CST 2022
;; MSG SIZE  rcvd: 106
Host info
Host 21.171.194.53.in-addr.arpa. not found: 3(NXDOMAIN)
Nslookup info:
Server:		183.60.83.19
Address:	183.60.83.19#53

** server can't find 21.171.194.53.in-addr.arpa: NXDOMAIN
Related IP info:
Related comments:
IP Type Details Datetime
222.186.190.14 attackspambots
May  7 23:21:40 santamaria sshd\[18987\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=222.186.190.14  user=root
May  7 23:21:42 santamaria sshd\[18987\]: Failed password for root from 222.186.190.14 port 18290 ssh2
May  7 23:21:44 santamaria sshd\[18987\]: Failed password for root from 222.186.190.14 port 18290 ssh2
...
2020-05-08 05:28:11
46.174.13.6 attackbots
Icarus honeypot on github
2020-05-08 05:26:58
51.91.56.33 attack
May  7 21:32:30 ns382633 sshd\[19943\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.91.56.33  user=root
May  7 21:32:32 ns382633 sshd\[19943\]: Failed password for root from 51.91.56.33 port 55420 ssh2
May  7 21:45:01 ns382633 sshd\[22157\]: Invalid user st from 51.91.56.33 port 57524
May  7 21:45:01 ns382633 sshd\[22157\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.91.56.33
May  7 21:45:02 ns382633 sshd\[22157\]: Failed password for invalid user st from 51.91.56.33 port 57524 ssh2
2020-05-08 05:21:46
49.73.84.175 attack
2020-05-07T20:18:44.402662vps751288.ovh.net sshd\[6430\]: Invalid user jessica from 49.73.84.175 port 36926
2020-05-07T20:18:44.411031vps751288.ovh.net sshd\[6430\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=49.73.84.175
2020-05-07T20:18:46.265987vps751288.ovh.net sshd\[6430\]: Failed password for invalid user jessica from 49.73.84.175 port 36926 ssh2
2020-05-07T20:21:41.911806vps751288.ovh.net sshd\[6479\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=49.73.84.175  user=root
2020-05-07T20:21:44.734992vps751288.ovh.net sshd\[6479\]: Failed password for root from 49.73.84.175 port 42036 ssh2
2020-05-08 05:53:21
180.76.152.157 attackspambots
May  7 19:19:25 xeon sshd[28935]: Failed password for root from 180.76.152.157 port 39566 ssh2
2020-05-08 05:40:04
189.160.162.222 attackbotsspam
1588871879 - 05/07/2020 19:17:59 Host: 189.160.162.222/189.160.162.222 Port: 445 TCP Blocked
2020-05-08 05:50:42
112.85.42.174 attack
May  7 21:39:34 vlre-nyc-1 sshd\[23149\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=112.85.42.174  user=root
May  7 21:39:36 vlre-nyc-1 sshd\[23149\]: Failed password for root from 112.85.42.174 port 36105 ssh2
May  7 21:39:39 vlre-nyc-1 sshd\[23149\]: Failed password for root from 112.85.42.174 port 36105 ssh2
May  7 21:39:43 vlre-nyc-1 sshd\[23149\]: Failed password for root from 112.85.42.174 port 36105 ssh2
May  7 21:39:47 vlre-nyc-1 sshd\[23149\]: Failed password for root from 112.85.42.174 port 36105 ssh2
...
2020-05-08 05:43:01
103.44.13.246 attackbotsspam
2020-05-07T19:18:12.838374scrat postfix/smtpd[3588456]: NOQUEUE: reject: RCPT from unknown[103.44.13.246]: 450 4.7.25 Client host rejected: cannot find your hostname, [103.44.13.246]; from= to= proto=ESMTP helo=<2cd.us>
2020-05-07T19:18:14.031213scrat postfix/smtpd[3588456]: NOQUEUE: reject: RCPT from unknown[103.44.13.246]: 450 4.7.25 Client host rejected: cannot find your hostname, [103.44.13.246]; from= to= proto=ESMTP helo=<2cd.us>
2020-05-07T19:18:15.209980scrat postfix/smtpd[3588456]: NOQUEUE: reject: RCPT from unknown[103.44.13.246]: 450 4.7.25 Client host rejected: cannot find your hostname, [103.44.13.246]; from= to= proto=ESMTP helo=<2cd.us>
2020-05-07T19:18:16.378713scrat postfix/smtpd[3588456]: NOQUEUE: reject: RCPT from unknown[103.44.13.246]: 450 4.7.25 Client host rejected: cannot find your hostname, [103.44.13.246]; from= to=
2020-05-08 05:34:25
198.100.146.67 attackbots
sshd jail - ssh hack attempt
2020-05-08 05:38:01
49.198.225.68 attack
SSH Brute-Force reported by Fail2Ban
2020-05-08 05:36:49
150.158.122.241 attack
Bruteforce detected by fail2ban
2020-05-08 05:20:34
159.89.169.68 attackbots
May  7 23:28:02 hosting sshd[14858]: Invalid user plp from 159.89.169.68 port 60464
...
2020-05-08 05:26:03
193.153.186.159 attackspam
May  7 19:18:08 Ubuntu-1404-trusty-64-minimal sshd\[1864\]: Invalid user pi from 193.153.186.159
May  7 19:18:08 Ubuntu-1404-trusty-64-minimal sshd\[1864\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=193.153.186.159
May  7 19:18:08 Ubuntu-1404-trusty-64-minimal sshd\[1866\]: Invalid user pi from 193.153.186.159
May  7 19:18:08 Ubuntu-1404-trusty-64-minimal sshd\[1866\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=193.153.186.159
May  7 19:18:10 Ubuntu-1404-trusty-64-minimal sshd\[1864\]: Failed password for invalid user pi from 193.153.186.159 port 36460 ssh2
2020-05-08 05:39:53
61.7.235.211 attack
May  7 19:30:19 piServer sshd[32181]: Failed password for root from 61.7.235.211 port 45698 ssh2
May  7 19:36:20 piServer sshd[32721]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=61.7.235.211 
May  7 19:36:21 piServer sshd[32721]: Failed password for invalid user mc3 from 61.7.235.211 port 57076 ssh2
...
2020-05-08 05:36:18
112.196.54.35 attack
fail2ban
2020-05-08 05:27:45

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