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: United States

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:
b
Dig info:
; <<>> DiG 9.10.3-P4-Ubuntu <<>> 104.21.51.202
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 34782
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;104.21.51.202.			IN	A

;; AUTHORITY SECTION:
.			446	IN	SOA	a.root-servers.net. nstld.verisign-grs.com. 2022021700 1800 900 604800 86400

;; Query time: 16 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Thu Feb 17 23:40:55 CST 2022
;; MSG SIZE  rcvd: 106
Host info
Host 202.51.21.104.in-addr.arpa. not found: 3(NXDOMAIN)
Nslookup info:
Server:		183.60.83.19
Address:	183.60.83.19#53

** server can't find 202.51.21.104.in-addr.arpa: NXDOMAIN
Related IP info:
Related comments:
IP Type Details Datetime
188.166.111.207 attackbotsspam
188.166.111.207 - - \[26/Nov/2019:15:43:36 +0100\] "POST /wp-login.php HTTP/1.0" 200 4404 "-" "Mozilla/5.0 \(X11\; Ubuntu\; Linux x86_64\; rv:62.0\) Gecko/20100101 Firefox/62.0"
188.166.111.207 - - \[26/Nov/2019:15:43:37 +0100\] "POST /wp-login.php HTTP/1.0" 200 4236 "-" "Mozilla/5.0 \(X11\; Ubuntu\; Linux x86_64\; rv:62.0\) Gecko/20100101 Firefox/62.0"
188.166.111.207 - - \[26/Nov/2019:15:43:48 +0100\] "POST /wp-login.php HTTP/1.0" 200 4235 "-" "Mozilla/5.0 \(X11\; Ubuntu\; Linux x86_64\; rv:62.0\) Gecko/20100101 Firefox/62.0"
2019-11-27 02:06:46
120.205.45.252 attackbotsspam
Nov 26 18:26:58 meumeu sshd[21078]: Failed password for root from 120.205.45.252 port 60198 ssh2
Nov 26 18:27:04 meumeu sshd[21095]: Failed password for root from 120.205.45.252 port 60742 ssh2
...
2019-11-27 02:09:37
198.166.81.210 attackspambots
SSH Brute-Forcing (ownc)
2019-11-27 01:42:59
210.245.89.85 attack
2019-11-26T19:18:27.469607centos sshd\[8678\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=210.245.89.85  user=root
2019-11-26T19:18:29.580936centos sshd\[8678\]: Failed password for root from 210.245.89.85 port 51106 ssh2
2019-11-26T19:18:31.893936centos sshd\[8678\]: Failed password for root from 210.245.89.85 port 51106 ssh2
2019-11-27 02:23:09
142.44.184.79 attackspam
Nov 26 07:05:28 php1 sshd\[13022\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=142.44.184.79  user=root
Nov 26 07:05:31 php1 sshd\[13022\]: Failed password for root from 142.44.184.79 port 49812 ssh2
Nov 26 07:11:51 php1 sshd\[13644\]: Invalid user lena from 142.44.184.79
Nov 26 07:11:51 php1 sshd\[13644\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=142.44.184.79
Nov 26 07:11:53 php1 sshd\[13644\]: Failed password for invalid user lena from 142.44.184.79 port 59178 ssh2
2019-11-27 01:51:31
129.232.170.218 attackspam
#16015 - [129.232.170.218] Error: 550 5.7.1 Forged HELO hostname detected
#16015 - [129.232.170.218] Error: 550 5.7.1 Forged HELO hostname detected
#16015 - [129.232.170.218] Error: 550 5.7.1 Forged HELO hostname detected
#16015 - [129.232.170.218] Error: 550 5.7.1 Forged HELO hostname detected

........
-----------------------------------------------
https://www.blocklist.de/en/view.html?ip=129.232.170.218
2019-11-27 01:41:33
222.186.180.41 attack
Nov 26 18:48:10 dedicated sshd[13613]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=222.186.180.41  user=root
Nov 26 18:48:12 dedicated sshd[13613]: Failed password for root from 222.186.180.41 port 30850 ssh2
2019-11-27 01:50:22
66.108.165.215 attackbots
2019-11-26T07:43:46.846242-07:00 suse-nuc sshd[31283]: Invalid user gmt from 66.108.165.215 port 51528
...
2019-11-27 02:07:46
61.8.69.98 attack
Nov 26 17:47:06 vpn01 sshd[1464]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=61.8.69.98
Nov 26 17:47:08 vpn01 sshd[1464]: Failed password for invalid user die from 61.8.69.98 port 59120 ssh2
...
2019-11-27 01:45:39
64.190.91.203 attackspam
Nov 26 18:12:45 mail sshd[6308]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=64.190.91.203 
Nov 26 18:12:46 mail sshd[6308]: Failed password for invalid user postgres from 64.190.91.203 port 39272 ssh2
Nov 26 18:18:36 mail sshd[7359]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=64.190.91.203
2019-11-27 01:48:58
201.148.121.106 attack
Nov 27 00:55:00 our-server-hostname postfix/smtpd[17731]: connect from unknown[201.148.121.106]
Nov x@x
Nov x@x
Nov x@x
Nov x@x
Nov x@x
Nov x@x
Nov x@x
Nov x@x
Nov x@x
Nov x@x
Nov x@x


........
-----------------------------------------------
https://www.blocklist.de/en/view.html?ip=201.148.121.106
2019-11-27 01:42:43
106.13.67.127 attack
Nov 26 17:56:01 MK-Soft-VM6 sshd[15836]: Failed password for lp from 106.13.67.127 port 36012 ssh2
...
2019-11-27 02:10:31
37.59.119.181 attackbotsspam
Brute force SMTP login attempted.
...
2019-11-27 02:02:46
45.226.81.197 attack
Nov 26 15:50:48 odroid64 sshd\[8373\]: Invalid user http from 45.226.81.197
Nov 26 15:50:48 odroid64 sshd\[8373\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=45.226.81.197
...
2019-11-27 02:18:10
212.237.62.122 attackbotsspam
Nov 26 18:46:07 vps647732 sshd[13278]: Failed password for mysql from 212.237.62.122 port 52536 ssh2
...
2019-11-27 02:14:31

Recently Reported IPs

104.21.51.2 104.21.51.203 104.21.51.208 29.34.52.58
104.21.51.21 104.21.51.216 104.21.51.220 104.21.51.225
104.21.51.227 104.21.51.228 229.56.208.57 104.21.51.23
104.21.51.230 104.21.51.232 104.21.51.24 104.21.51.245
104.21.51.248 104.21.51.25 104.21.51.26 243.28.96.29