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:
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Dig info:
; <<>> DiG 9.10.3-P4-Ubuntu <<>> 104.21.5.51
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 7590
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;104.21.5.51.			IN	A

;; AUTHORITY SECTION:
.			600	IN	SOA	a.root-servers.net. nstld.verisign-grs.com. 2022021701 1800 900 604800 86400

;; Query time: 55 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Fri Feb 18 02:34:22 CST 2022
;; MSG SIZE  rcvd: 104
Host info
Host 51.5.21.104.in-addr.arpa. not found: 3(NXDOMAIN)
Nslookup info:
Server:		183.60.83.19
Address:	183.60.83.19#53

** server can't find 51.5.21.104.in-addr.arpa: NXDOMAIN
Related IP info:
Related comments:
IP Type Details Datetime
110.242.118.219 attackspambots
8080/tcp
[2019-11-20]1pkt
2019-11-21 05:19:57
51.91.110.249 attackspam
Repeated brute force against a port
2019-11-21 04:58:59
203.171.221.82 attack
1433/tcp
[2019-11-20]1pkt
2019-11-21 05:26:19
191.211.44.102 attackbotsspam
Automatic report - Port Scan Attack
2019-11-21 05:02:45
163.172.251.80 attack
Nov 20 15:37:32 MK-Soft-VM5 sshd[19138]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=163.172.251.80 
Nov 20 15:37:35 MK-Soft-VM5 sshd[19138]: Failed password for invalid user boulay from 163.172.251.80 port 38268 ssh2
...
2019-11-21 05:27:52
138.197.179.102 attackspam
Invalid user aalbu from 138.197.179.102 port 57600
2019-11-21 04:55:32
185.175.93.14 attackbots
11/20/2019-15:39:21.154003 185.175.93.14 Protocol: 6 ET SCAN NMAP -sS window 1024
2019-11-21 04:59:34
113.140.94.248 attackbotsspam
445/tcp
[2019-11-20]1pkt
2019-11-21 05:12:55
51.68.124.181 attack
Nov 20 19:58:22 heissa sshd\[25179\]: Invalid user squid from 51.68.124.181 port 37314
Nov 20 19:58:22 heissa sshd\[25179\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=181.ip-51-68-124.eu
Nov 20 19:58:23 heissa sshd\[25179\]: Failed password for invalid user squid from 51.68.124.181 port 37314 ssh2
Nov 20 20:01:31 heissa sshd\[25734\]: Invalid user ftpuser from 51.68.124.181 port 46134
Nov 20 20:01:31 heissa sshd\[25734\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=181.ip-51-68-124.eu
2019-11-21 05:21:03
1.162.148.44 attack
23/tcp
[2019-11-20]1pkt
2019-11-21 05:15:52
51.75.28.134 attackbotsspam
Nov 20 18:50:23 meumeu sshd[1820]: Failed password for root from 51.75.28.134 port 53934 ssh2
Nov 20 18:53:52 meumeu sshd[2378]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.75.28.134 
Nov 20 18:53:54 meumeu sshd[2378]: Failed password for invalid user named from 51.75.28.134 port 35228 ssh2
...
2019-11-21 05:14:31
220.92.16.66 attack
Invalid user agustina from 220.92.16.66 port 56096
2019-11-21 05:28:53
128.199.221.30 attackbotsspam
11/20/2019-20:08:58.712445 128.199.221.30 Protocol: 6 ET SCAN NETWORK Incoming Masscan detected
2019-11-21 05:18:49
187.170.37.132 attackspam
8080/tcp
[2019-11-20]1pkt
2019-11-21 05:08:21
186.3.234.169 attackbotsspam
Nov 20 13:34:21 Tower sshd[26483]: Connection from 186.3.234.169 port 37459 on 192.168.10.220 port 22
Nov 20 13:34:24 Tower sshd[26483]: Invalid user server from 186.3.234.169 port 37459
Nov 20 13:34:24 Tower sshd[26483]: error: Could not get shadow information for NOUSER
Nov 20 13:34:24 Tower sshd[26483]: Failed password for invalid user server from 186.3.234.169 port 37459 ssh2
Nov 20 13:34:24 Tower sshd[26483]: Received disconnect from 186.3.234.169 port 37459:11: Bye Bye [preauth]
Nov 20 13:34:24 Tower sshd[26483]: Disconnected from invalid user server 186.3.234.169 port 37459 [preauth]
2019-11-21 05:30:10

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