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 <<>> 104.21.51.58
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 6074
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;104.21.51.58.			IN	A

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

;; Query time: 63 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Fri Feb 18 10:12:26 CST 2022
;; MSG SIZE  rcvd: 105
Host info
Host 58.51.21.104.in-addr.arpa. not found: 3(NXDOMAIN)
Nslookup info:
Server:		183.60.83.19
Address:	183.60.83.19#53

** server can't find 58.51.21.104.in-addr.arpa: NXDOMAIN
Related IP info:
Related comments:
IP Type Details Datetime
193.56.28.151 attackbotsspam
Jan 10 23:07:55 dri postfix/smtpd[8565]: warning: unknown[193.56.28.151]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jan 10 23:08:03 dri postfix/smtpd[8565]: warning: unknown[193.56.28.151]: SASL 
...
2020-01-11 08:26:39
64.150.200.34 attackbots
Jan 10 22:08:23 grey postfix/smtpd\[27528\]: NOQUEUE: reject: RCPT from unknown\[64.150.200.34\]: 554 5.7.1 Service unavailable\; Client host \[64.150.200.34\] blocked using truncate.gbudb.net\; http://www.gbudb.com/truncate/ \[64.150.200.34\]\; from=\ to=\ proto=ESMTP helo=\<\[64.150.200.34\]\>
...
2020-01-11 08:21:44
198.108.67.34 attack
ET DROP Dshield Block Listed Source group 1 - port: 3109 proto: TCP cat: Misc Attack
2020-01-11 08:22:48
146.185.201.211 attackspam
B: zzZZzz blocked content access
2020-01-11 08:22:13
198.98.52.141 attackspam
Jan 11 01:08:39 *host* sshd\[12289\]: Invalid user zabbix from 198.98.52.141 port 42950 ...
2020-01-11 08:15:41
185.230.202.112 attackbots
Jan 10 22:08:12 grey postfix/smtpd\[29993\]: NOQUEUE: reject: RCPT from unknown\[185.230.202.112\]: 554 5.7.1 Service unavailable\; Client host \[185.230.202.112\] blocked using truncate.gbudb.net\; http://www.gbudb.com/truncate/ \[185.230.202.112\]\; from=\ to=\ proto=ESMTP helo=\<\[185.230.202.112\]\>
...
2020-01-11 08:29:06
54.38.160.4 attackspambots
Jan 11 01:02:56 mout sshd[6563]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=54.38.160.4  user=root
Jan 11 01:02:58 mout sshd[6563]: Failed password for root from 54.38.160.4 port 53820 ssh2
2020-01-11 08:10:45
111.231.119.141 attack
Jan 11 00:08:49 MK-Soft-VM7 sshd[30967]: Failed password for root from 111.231.119.141 port 55486 ssh2
...
2020-01-11 07:57:08
218.92.0.191 attackspambots
Jan 11 01:20:31 dcd-gentoo sshd[21660]: User root from 218.92.0.191 not allowed because none of user's groups are listed in AllowGroups
Jan 11 01:20:34 dcd-gentoo sshd[21660]: error: PAM: Authentication failure for illegal user root from 218.92.0.191
Jan 11 01:20:31 dcd-gentoo sshd[21660]: User root from 218.92.0.191 not allowed because none of user's groups are listed in AllowGroups
Jan 11 01:20:34 dcd-gentoo sshd[21660]: error: PAM: Authentication failure for illegal user root from 218.92.0.191
Jan 11 01:20:31 dcd-gentoo sshd[21660]: User root from 218.92.0.191 not allowed because none of user's groups are listed in AllowGroups
Jan 11 01:20:34 dcd-gentoo sshd[21660]: error: PAM: Authentication failure for illegal user root from 218.92.0.191
Jan 11 01:20:34 dcd-gentoo sshd[21660]: Failed keyboard-interactive/pam for invalid user root from 218.92.0.191 port 20485 ssh2
...
2020-01-11 08:23:31
191.34.189.176 attackspam
1578692324 - 01/10/2020 22:38:44 Host: 191.34.189.176/191.34.189.176 Port: 445 TCP Blocked
2020-01-11 07:56:09
163.172.9.28 attackspambots
CloudCIX Reconnaissance Scan Detected, PTR: 163-172-9-28.rev.poneytelecom.eu.
2020-01-11 08:16:23
222.186.173.183 attack
2020-01-11T01:27:21.521547struts4.enskede.local sshd\[17795\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=222.186.173.183  user=root
2020-01-11T01:27:25.131950struts4.enskede.local sshd\[17795\]: Failed password for root from 222.186.173.183 port 64806 ssh2
2020-01-11T01:27:28.553382struts4.enskede.local sshd\[17795\]: Failed password for root from 222.186.173.183 port 64806 ssh2
2020-01-11T01:27:32.594079struts4.enskede.local sshd\[17795\]: Failed password for root from 222.186.173.183 port 64806 ssh2
2020-01-11T01:27:37.463271struts4.enskede.local sshd\[17795\]: Failed password for root from 222.186.173.183 port 64806 ssh2
...
2020-01-11 08:31:58
190.53.30.233 attackspambots
Jan 10 22:08:23 grey postfix/smtpd\[29769\]: NOQUEUE: reject: RCPT from unknown\[190.53.30.233\]: 554 5.7.1 Service unavailable\; Client host \[190.53.30.233\] blocked using truncate.gbudb.net\; http://www.gbudb.com/truncate/ \[190.53.30.233\]\; from=\ to=\ proto=ESMTP helo=\
...
2020-01-11 08:21:20
77.247.110.73 attackbots
Brute force attack stopped by firewall
2020-01-11 08:04:26
160.242.199.114 attack
Unauthorized connection attempt detected from IP address 160.242.199.114 to port 445
2020-01-11 08:11:14

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