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:
b
Dig info:
; <<>> DiG 9.10.3-P4-Ubuntu <<>> 104.21.31.21
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 31499
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;104.21.31.21.			IN	A

;; AUTHORITY SECTION:
.			600	IN	SOA	a.root-servers.net. nstld.verisign-grs.com. 2022021801 1800 900 604800 86400

;; Query time: 18 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Sat Feb 19 03:29:44 CST 2022
;; MSG SIZE  rcvd: 105
Host info
Host 21.31.21.104.in-addr.arpa. not found: 3(NXDOMAIN)
Nslookup info:
Server:		183.60.83.19
Address:	183.60.83.19#53

** server can't find 21.31.21.104.in-addr.arpa: NXDOMAIN
Related IP info:
Related comments:
IP Type Details Datetime
175.211.112.66 attackbots
Invalid user sun from 175.211.112.66 port 54870
2019-07-16 21:17:11
62.210.187.223 attackbots
abuse-sasl
2019-07-16 21:18:32
62.133.58.66 attackspambots
Jul 16 12:38:19  postfix/smtpd: warning: unknown[62.133.58.66]: SASL LOGIN authentication failed
2019-07-16 20:54:47
51.158.77.90 attack
Jul 14 05:21:00 vpxxxxxxx22308 sshd[2419]: Invalid user a from 51.158.77.90
Jul 14 05:21:00 vpxxxxxxx22308 sshd[2419]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.158.77.90
Jul 14 05:21:03 vpxxxxxxx22308 sshd[2419]: Failed password for invalid user a from 51.158.77.90 port 51766 ssh2
Jul 14 05:21:12 vpxxxxxxx22308 sshd[2425]: Invalid user a from 51.158.77.90
Jul 14 05:21:12 vpxxxxxxx22308 sshd[2425]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.158.77.90
Jul 14 05:21:14 vpxxxxxxx22308 sshd[2427]: Invalid user a from 51.158.77.90
Jul 14 05:21:14 vpxxxxxxx22308 sshd[2427]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.158.77.90
Jul 14 05:21:15 vpxxxxxxx22308 sshd[2425]: Failed password for invalid user a from 51.158.77.90 port 50714 ssh2
Jul 14 05:21:16 vpxxxxxxx22308 sshd[2427]: Failed password for invalid user a from 51.158.77.90 port ........
------------------------------
2019-07-16 21:16:13
62.113.202.95 attackspambots
abuse-sasl
2019-07-16 21:21:08
36.89.248.125 attackbotsspam
Jul 16 13:16:09 mail sshd\[26924\]: Failed password for invalid user al from 36.89.248.125 port 42500 ssh2
Jul 16 13:36:27 mail sshd\[27250\]: Invalid user kd from 36.89.248.125 port 43360
...
2019-07-16 20:41:38
45.248.133.36 attack
Invalid user login from 45.248.133.36 port 53796
2019-07-16 20:43:03
206.189.24.75 attack
Caught in portsentry honeypot
2019-07-16 21:07:05
5.88.155.130 attack
2019-07-16T12:45:23.598041abusebot-2.cloudsearch.cf sshd\[492\]: Invalid user opiabi from 5.88.155.130 port 41288
2019-07-16 20:55:18
36.91.162.10 attackspambots
Jul 16 13:13:43 bouncer sshd\[9093\]: Invalid user admin from 36.91.162.10 port 65303
Jul 16 13:13:43 bouncer sshd\[9093\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=36.91.162.10 
Jul 16 13:13:45 bouncer sshd\[9093\]: Failed password for invalid user admin from 36.91.162.10 port 65303 ssh2
...
2019-07-16 21:08:02
77.40.2.102 attackbots
abuse-sasl
2019-07-16 20:37:03
104.236.22.133 attackbotsspam
Jul 16 15:17:23 cp sshd[11189]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=104.236.22.133
2019-07-16 21:22:02
178.33.52.5 attackbotsspam
php WP PHPmyadamin ABUSE blocked for 12h
2019-07-16 20:49:31
123.21.251.46 attackbotsspam
Brute force attempt
2019-07-16 21:11:10
62.30.111.219 attackspam
abuse-sasl
2019-07-16 21:02:55

Recently Reported IPs

104.21.31.121 104.21.31.168 104.21.31.19 104.21.31.27
104.21.31.200 104.21.31.72 104.21.31.99 104.21.32.12
104.21.31.61 104.21.32.164 104.21.32.170 104.21.32.17
104.21.32.118 104.21.32.217 104.21.32.218 104.21.33.145
104.21.33.42 104.21.33.171 104.21.34.122 104.21.33.220