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 <<>> 104.21.21.51
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 37261
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;104.21.21.51.			IN	A

;; AUTHORITY SECTION:
.			150	IN	SOA	a.root-servers.net. nstld.verisign-grs.com. 2022022000 1800 900 604800 86400

;; Query time: 17 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Sun Feb 20 19:30:22 CST 2022
;; MSG SIZE  rcvd: 105
Host info
Host 51.21.21.104.in-addr.arpa. not found: 3(NXDOMAIN)
Nslookup info:
Server:		183.60.83.19
Address:	183.60.83.19#53

** server can't find 51.21.21.104.in-addr.arpa: NXDOMAIN
Related IP info:
Related comments:
IP Type Details Datetime
112.85.42.181 attackspam
Sep  4 14:52:23 pve1 sshd[13318]: Failed password for root from 112.85.42.181 port 18531 ssh2
Sep  4 14:52:27 pve1 sshd[13318]: Failed password for root from 112.85.42.181 port 18531 ssh2
...
2020-09-04 20:52:41
61.221.64.4 attackspambots
"Unauthorized connection attempt on SSHD detected"
2020-09-04 20:45:24
49.235.69.80 attack
$f2bV_matches
2020-09-04 20:43:56
103.44.253.18 attackbotsspam
Sep  4 06:23:02 124388 sshd[18063]: Failed password for invalid user sga from 103.44.253.18 port 32852 ssh2
Sep  4 06:24:43 124388 sshd[18149]: Invalid user bxl from 103.44.253.18 port 53768
Sep  4 06:24:43 124388 sshd[18149]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=103.44.253.18
Sep  4 06:24:43 124388 sshd[18149]: Invalid user bxl from 103.44.253.18 port 53768
Sep  4 06:24:45 124388 sshd[18149]: Failed password for invalid user bxl from 103.44.253.18 port 53768 ssh2
2020-09-04 20:57:28
123.125.21.125 attack
$f2bV_matches
2020-09-04 20:23:21
13.57.26.19 attack
2020-09-03 19:05 Unauthorized connection attempt to IMAP/POP
2020-09-04 20:29:24
185.175.93.23 attack
 TCP (SYN) 185.175.93.23:40576 -> port 5922, len 44
2020-09-04 20:46:52
222.186.175.202 attackbots
Sep  4 13:49:10 ns308116 sshd[31352]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=222.186.175.202  user=root
Sep  4 13:49:12 ns308116 sshd[31352]: Failed password for root from 222.186.175.202 port 55812 ssh2
Sep  4 13:49:15 ns308116 sshd[31352]: Failed password for root from 222.186.175.202 port 55812 ssh2
Sep  4 13:49:19 ns308116 sshd[31352]: Failed password for root from 222.186.175.202 port 55812 ssh2
Sep  4 13:49:22 ns308116 sshd[31352]: Failed password for root from 222.186.175.202 port 55812 ssh2
...
2020-09-04 20:50:22
117.85.113.111 attack
/%23
2020-09-04 20:20:43
191.240.89.232 attackbotsspam
Attempted Brute Force (dovecot)
2020-09-04 20:23:41
213.108.161.64 attackspambots
Attempted Brute Force (dovecot)
2020-09-04 20:34:13
94.66.82.224 attack
Attempts to probe web pages for vulnerable PHP or other applications
2020-09-04 20:34:25
129.204.146.171 attack
IP 129.204.146.171 attacked honeypot on port: 6379 at 9/3/2020 9:50:17 AM
2020-09-04 20:59:15
112.85.42.67 attack
September 04 2020, 08:52:39 [sshd] - Banned from the Mad Pony WordPress hosting platform by Fail2ban.
2020-09-04 20:54:24
5.188.206.194 attackspambots
2020-09-04 14:32:36 dovecot_login authenticator failed for \(\[5.188.206.194\]\) \[5.188.206.194\]: 535 Incorrect authentication data \(set_id=craze@no-server.de\)
2020-09-04 14:32:45 dovecot_login authenticator failed for \(\[5.188.206.194\]\) \[5.188.206.194\]: 535 Incorrect authentication data
2020-09-04 14:39:44 dovecot_login authenticator failed for \(\[5.188.206.194\]\) \[5.188.206.194\]: 535 Incorrect authentication data \(set_id=admin2011@no-server.de\)
2020-09-04 14:39:55 dovecot_login authenticator failed for \(\[5.188.206.194\]\) \[5.188.206.194\]: 535 Incorrect authentication data
2020-09-04 14:40:06 dovecot_login authenticator failed for \(\[5.188.206.194\]\) \[5.188.206.194\]: 535 Incorrect authentication data
2020-09-04 14:40:21 dovecot_login authenticator failed for \(\[5.188.206.194\]\) \[5.188.206.194\]: 535 Incorrect authentication data
2020-09-04 14:40:28 dovecot_login authenticator failed for \(\[5.188.206.194\]\) \[5.188.206.194\]: 535 Incorrect authentication dat
...
2020-09-04 20:48:17

Recently Reported IPs

104.21.22.106 104.21.22.121 104.21.22.128 104.21.21.89
114.28.84.255 104.21.22.17 104.21.22.140 104.21.22.138
104.21.22.183 104.21.22.166 104.21.22.147 104.21.22.179
104.21.22.197 104.21.22.159 104.21.22.19 104.21.22.205
104.21.22.211 104.21.22.26 104.21.22.38 104.21.22.219