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 <<>> 104.21.51.19
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 47601
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;104.21.51.19.			IN	A

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

;; Query time: 67 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Fri Feb 18 02:35:12 CST 2022
;; MSG SIZE  rcvd: 105
Host info
Host 19.51.21.104.in-addr.arpa. not found: 3(NXDOMAIN)
Nslookup info:
Server:		183.60.83.19
Address:	183.60.83.19#53

** server can't find 19.51.21.104.in-addr.arpa: NXDOMAIN
Related IP info:
Related comments:
IP Type Details Datetime
109.202.117.96 attack
10/31/2019-08:08:17.707358 109.202.117.96 Protocol: 6 ET SCAN Potential SSH Scan
2019-10-31 20:38:16
191.184.203.71 attack
Invalid user ew from 191.184.203.71 port 59400
pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=191.184.203.71
Failed password for invalid user ew from 191.184.203.71 port 59400 ssh2
pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=191.184.203.71  user=root
Failed password for root from 191.184.203.71 port 50636 ssh2
2019-10-31 20:59:07
222.186.173.238 attack
Oct 31 13:27:35 h2177944 sshd\[12188\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=222.186.173.238  user=root
Oct 31 13:27:37 h2177944 sshd\[12188\]: Failed password for root from 222.186.173.238 port 20874 ssh2
Oct 31 13:27:42 h2177944 sshd\[12188\]: Failed password for root from 222.186.173.238 port 20874 ssh2
Oct 31 13:27:47 h2177944 sshd\[12188\]: Failed password for root from 222.186.173.238 port 20874 ssh2
...
2019-10-31 20:28:05
54.38.210.45 attackspambots
HTTP 503 XSS Attempt
2019-10-31 20:55:34
67.205.168.47 attackbots
MultiHost/MultiPort Probe, Scan, Hack -
2019-10-31 20:51:05
77.247.110.178 attack
MultiHost/MultiPort Probe, Scan, Hack -
2019-10-31 20:54:16
5.199.130.188 attackbots
10/31/2019-13:08:16.994903 5.199.130.188 Protocol: 6 ET TOR Known Tor Exit Node Traffic group 73
2019-10-31 20:38:37
32.114.249.30 attack
Oct 31 13:07:52 host sshd[7964]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=32.114.249.30  user=root
Oct 31 13:07:55 host sshd[7964]: Failed password for root from 32.114.249.30 port 36496 ssh2
...
2019-10-31 20:52:17
51.75.133.167 attackbots
Oct 31 02:38:21 web1 sshd\[15316\]: Invalid user ts35 from 51.75.133.167
Oct 31 02:38:21 web1 sshd\[15316\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.75.133.167
Oct 31 02:38:23 web1 sshd\[15316\]: Failed password for invalid user ts35 from 51.75.133.167 port 58270 ssh2
Oct 31 02:42:21 web1 sshd\[15698\]: Invalid user user from 51.75.133.167
Oct 31 02:42:21 web1 sshd\[15698\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.75.133.167
2019-10-31 20:55:53
199.249.230.107 attack
10/31/2019-13:08:33.106794 199.249.230.107 Protocol: 6 ET TOR Known Tor Exit Node Traffic group 47
2019-10-31 20:27:19
192.144.179.249 attackbotsspam
Oct 31 09:47:52 firewall sshd[23478]: Invalid user Cxsd123 from 192.144.179.249
Oct 31 09:47:54 firewall sshd[23478]: Failed password for invalid user Cxsd123 from 192.144.179.249 port 36928 ssh2
Oct 31 09:53:46 firewall sshd[23631]: Invalid user fuwuqinet! from 192.144.179.249
...
2019-10-31 20:54:48
58.20.187.21 attack
invalid login attempt
2019-10-31 20:32:40
46.38.144.146 attackspambots
Oct 31 08:40:28 web1 postfix/smtpd[2481]: warning: unknown[46.38.144.146]: SASL LOGIN authentication failed: authentication failure
...
2019-10-31 20:46:17
185.40.4.228 attack
10/31/2019-13:07:54.492880 185.40.4.228 Protocol: 6 ET SCAN Suspicious inbound to MSSQL port 1433
2019-10-31 20:53:21
117.64.226.21 attack
Oct 31 07:59:43 eola postfix/smtpd[16821]: connect from unknown[117.64.226.21]
Oct 31 07:59:44 eola postfix/smtpd[16821]: NOQUEUE: reject: RCPT from unknown[117.64.226.21]: 504 5.5.2 : Helo command rejected: need fully-qualified hostname; from=x@x helo=
Oct 31 07:59:44 eola postfix/smtpd[16821]: disconnect from unknown[117.64.226.21] ehlo=1 mail=1 rcpt=0/1 quhostname=1 commands=3/4
Oct 31 07:59:45 eola postfix/smtpd[16821]: connect from unknown[117.64.226.21]
Oct 31 07:59:46 eola postfix/smtpd[16821]: lost connection after AUTH from unknown[117.64.226.21]
Oct 31 07:59:46 eola postfix/smtpd[16821]: disconnect from unknown[117.64.226.21] ehlo=1 auth=0/1 commands=1/2
Oct 31 07:59:46 eola postfix/smtpd[16821]: connect from unknown[117.64.226.21]
Oct 31 07:59:48 eola postfix/smtpd[16821]: lost connection after AUTH from unknown[117.64.226.21]
Oct 31 07:59:48 eola postfix/smtpd[16821]: disconnect from unknown[117.64.226.21] ehlo=1 auth=0/1 commands=1/2
Oct 31 0........
-------------------------------
2019-10-31 20:21:45

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