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: None

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 <<>> 104.21.51.197
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 3982
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;104.21.51.197.			IN	A

;; AUTHORITY SECTION:
.			161	IN	SOA	a.root-servers.net. nstld.verisign-grs.com. 2022021702 1800 900 604800 86400

;; Query time: 26 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Fri Feb 18 10:12:19 CST 2022
;; MSG SIZE  rcvd: 106
Host info
Host 197.51.21.104.in-addr.arpa. not found: 3(NXDOMAIN)
Nslookup info:
Server:		183.60.83.19
Address:	183.60.83.19#53

** server can't find 197.51.21.104.in-addr.arpa: NXDOMAIN
Related IP info:
Related comments:
IP Type Details Datetime
178.140.185.219 attackspam
Dec 24 08:13:52 km20725 sshd\[5851\]: Failed password for root from 178.140.185.219 port 33613 ssh2Dec 24 08:13:54 km20725 sshd\[5851\]: Failed password for root from 178.140.185.219 port 33613 ssh2Dec 24 08:13:57 km20725 sshd\[5851\]: Failed password for root from 178.140.185.219 port 33613 ssh2Dec 24 08:13:58 km20725 sshd\[5851\]: Failed password for root from 178.140.185.219 port 33613 ssh2
...
2019-12-24 21:48:34
85.93.52.99 attackspam
Invalid user bambang from 85.93.52.99 port 49780
2019-12-24 21:59:22
49.234.64.252 attackbotsspam
Automatic report - SSH Brute-Force Attack
2019-12-24 21:57:22
95.183.133.40 attack
Unauthorized connection attempt detected from IP address 95.183.133.40 to port 445
2019-12-24 22:00:59
193.226.218.75 attackbotsspam
firewall-block, port(s): 2222/tcp
2019-12-24 22:02:34
106.13.17.8 attack
Dec 24 09:06:35 plusreed sshd[11540]: Invalid user zjidc!@ from 106.13.17.8
...
2019-12-24 22:22:22
180.250.214.25 attackspambots
Dec 24 12:53:57 l02a sshd[7034]: Invalid user test from 180.250.214.25
Dec 24 12:53:57 l02a sshd[7034]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=180.250.214.25 
Dec 24 12:53:57 l02a sshd[7034]: Invalid user test from 180.250.214.25
Dec 24 12:53:58 l02a sshd[7034]: Failed password for invalid user test from 180.250.214.25 port 46572 ssh2
2019-12-24 22:14:11
197.253.254.18 attack
CloudCIX Reconnaissance Scan Detected, PTR: PTR record not found
2019-12-24 21:58:26
106.75.100.91 attack
20 attempts against mh-ssh on cloud.magehost.pro
2019-12-24 21:55:14
45.125.66.194 attackbotsspam
Dec 24 09:07:25 web1 postfix/smtpd[22425]: warning: unknown[45.125.66.194]: SASL LOGIN authentication failed: authentication failure
...
2019-12-24 22:18:34
92.118.160.53 attack
firewall-block, port(s): 7547/tcp
2019-12-24 22:11:05
184.105.247.215 attackbotsspam
Scanning random ports - tries to find possible vulnerable services
2019-12-24 21:46:29
222.186.175.163 attack
pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=222.186.175.163  user=root
Failed password for root from 222.186.175.163 port 20292 ssh2
Failed password for root from 222.186.175.163 port 20292 ssh2
pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=222.186.175.163  user=root
Failed password for root from 222.186.175.163 port 33034 ssh2
2019-12-24 22:25:40
42.81.122.86 attack
12/24/2019-14:42:02.228341 42.81.122.86 Protocol: 6 ET CINS Active Threat Intelligence Poor Reputation IP group 41
2019-12-24 21:52:16
104.248.121.67 attackspambots
Invalid user splieth from 104.248.121.67 port 38244
2019-12-24 21:50:28

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