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:
b
Dig info:
; <<>> DiG 9.10.3-P4-Ubuntu <<>> 104.21.47.51
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 32134
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;104.21.47.51.			IN	A

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

;; Query time: 103 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Thu Feb 17 23:00:37 CST 2022
;; MSG SIZE  rcvd: 105
Host info
Host 51.47.21.104.in-addr.arpa. not found: 3(NXDOMAIN)
Nslookup info:
Server:		183.60.83.19
Address:	183.60.83.19#53

** server can't find 51.47.21.104.in-addr.arpa: NXDOMAIN
Related IP info:
Related comments:
IP Type Details Datetime
222.186.175.151 attackbots
Brute-force attempt banned
2020-01-11 03:16:41
182.61.169.72 attackspambots
Jan 10 07:40:05 hanapaa sshd\[9136\]: Invalid user qef from 182.61.169.72
Jan 10 07:40:05 hanapaa sshd\[9136\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=182.61.169.72
Jan 10 07:40:07 hanapaa sshd\[9136\]: Failed password for invalid user qef from 182.61.169.72 port 33002 ssh2
Jan 10 07:42:02 hanapaa sshd\[9348\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=182.61.169.72  user=root
Jan 10 07:42:03 hanapaa sshd\[9348\]: Failed password for root from 182.61.169.72 port 49902 ssh2
2020-01-11 03:22:41
223.155.120.228 attackspam
WEB Remote Command Execution via Shell Script -1.a
2020-01-11 03:46:39
82.63.179.12 attackspam
DATE:2020-01-10 17:40:02, IP:82.63.179.12, PORT:telnet - Telnet brute force auth on a honeypot server (epe-dc)
2020-01-11 03:11:23
88.132.237.187 attack
SASL PLAIN auth failed: ruser=...
2020-01-11 03:21:33
46.38.144.32 attack
Jan 10 20:12:54 localhost postfix/smtpd\[10920\]: warning: unknown\[46.38.144.32\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jan 10 20:13:28 localhost postfix/smtpd\[10920\]: warning: unknown\[46.38.144.32\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jan 10 20:14:05 localhost postfix/smtpd\[10920\]: warning: unknown\[46.38.144.32\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jan 10 20:14:44 localhost postfix/smtpd\[10920\]: warning: unknown\[46.38.144.32\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jan 10 20:15:20 localhost postfix/smtpd\[11272\]: warning: unknown\[46.38.144.32\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
...
2020-01-11 03:17:00
222.186.42.155 attack
Jan 10 16:08:43 firewall sshd[20418]: Failed password for root from 222.186.42.155 port 44250 ssh2
Jan 10 16:11:40 firewall sshd[20524]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=222.186.42.155  user=root
Jan 10 16:11:42 firewall sshd[20524]: Failed password for root from 222.186.42.155 port 33207 ssh2
...
2020-01-11 03:12:13
45.148.11.96 attackspambots
Email spam message
2020-01-11 03:11:41
180.215.209.212 attackspam
Jan 10 15:20:44 server sshd\[18135\]: Invalid user master from 180.215.209.212
Jan 10 15:20:44 server sshd\[18135\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=180.215.209.212 
Jan 10 15:20:46 server sshd\[18135\]: Failed password for invalid user master from 180.215.209.212 port 35356 ssh2
Jan 10 15:53:06 server sshd\[26237\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=180.215.209.212  user=root
Jan 10 15:53:08 server sshd\[26237\]: Failed password for root from 180.215.209.212 port 36816 ssh2
...
2020-01-11 03:38:41
88.220.45.116 attackspambots
SSH invalid-user multiple login attempts
2020-01-11 03:19:55
103.10.30.204 attack
Invalid user noreply from 103.10.30.204 port 52786
2020-01-11 03:37:16
103.51.153.235 attackspambots
$f2bV_matches
2020-01-11 03:30:22
159.203.197.156 attackbots
firewall-block, port(s): 50000/tcp
2020-01-11 03:19:31
162.246.107.56 attackspambots
Jan 10 17:33:36 meumeu sshd[10321]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=162.246.107.56 
Jan 10 17:33:38 meumeu sshd[10321]: Failed password for invalid user like from 162.246.107.56 port 57088 ssh2
Jan 10 17:35:18 meumeu sshd[10557]: Failed password for root from 162.246.107.56 port 41582 ssh2
...
2020-01-11 03:47:30
202.147.197.244 attackbotsspam
1578660784 - 01/10/2020 13:53:04 Host: 202.147.197.244/202.147.197.244 Port: 445 TCP Blocked
2020-01-11 03:41:27

Recently Reported IPs

104.21.47.49 104.21.47.53 104.21.47.55 104.21.47.57
92.182.51.51 104.21.47.59 104.21.47.6 104.21.47.60
104.21.47.65 104.21.47.66 104.21.47.73 104.21.47.78
104.21.47.84 104.21.47.87 104.21.47.88 106.147.167.27
104.21.47.9 104.21.47.93 104.21.47.96 104.21.47.99