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 <<>> 104.21.16.52
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 29856
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;104.21.16.52.			IN	A

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

;; Query time: 19 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Fri Feb 18 02:12:41 CST 2022
;; MSG SIZE  rcvd: 105
Host info
Host 52.16.21.104.in-addr.arpa. not found: 3(NXDOMAIN)
Nslookup info:
Server:		183.60.83.19
Address:	183.60.83.19#53

** server can't find 52.16.21.104.in-addr.arpa: NXDOMAIN
Related IP info:
Related comments:
IP Type Details Datetime
106.13.140.52 attackspambots
Oct  8 03:47:52 marvibiene sshd[14284]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.13.140.52  user=root
Oct  8 03:47:55 marvibiene sshd[14284]: Failed password for root from 106.13.140.52 port 46024 ssh2
Oct  8 03:56:52 marvibiene sshd[14370]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.13.140.52  user=root
Oct  8 03:56:53 marvibiene sshd[14370]: Failed password for root from 106.13.140.52 port 56348 ssh2
...
2019-10-08 14:22:46
222.186.180.20 attack
Oct  8 08:38:20 MK-Soft-VM7 sshd[31087]: Failed password for root from 222.186.180.20 port 57610 ssh2
Oct  8 08:38:26 MK-Soft-VM7 sshd[31087]: Failed password for root from 222.186.180.20 port 57610 ssh2
...
2019-10-08 14:42:44
213.251.35.49 attack
Oct  8 07:36:51 mail sshd[17911]: Failed password for root from 213.251.35.49 port 50850 ssh2
Oct  8 07:40:24 mail sshd[18554]: Failed password for root from 213.251.35.49 port 34498 ssh2
2019-10-08 14:29:42
111.93.190.157 attackbots
Jul 14 14:52:35 dallas01 sshd[31689]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=111.93.190.157
Jul 14 14:52:37 dallas01 sshd[31689]: Failed password for invalid user shop from 111.93.190.157 port 50362 ssh2
Jul 14 14:58:31 dallas01 sshd[32467]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=111.93.190.157
2019-10-08 14:53:07
213.14.214.203 attackbotsspam
2019-10-08T04:27:51.022681abusebot-4.cloudsearch.cf sshd\[22142\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=213.14.214.203  user=root
2019-10-08 14:38:07
152.136.116.121 attackspambots
Oct  8 07:54:47 meumeu sshd[30559]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=152.136.116.121 
Oct  8 07:54:48 meumeu sshd[30559]: Failed password for invalid user Centos!@# from 152.136.116.121 port 57852 ssh2
Oct  8 08:00:21 meumeu sshd[31585]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=152.136.116.121 
...
2019-10-08 14:16:36
91.132.103.64 attack
Oct  8 08:23:55 markkoudstaal sshd[23055]: Failed password for root from 91.132.103.64 port 57340 ssh2
Oct  8 08:27:39 markkoudstaal sshd[23386]: Failed password for root from 91.132.103.64 port 40680 ssh2
2019-10-08 14:33:31
218.60.41.227 attack
Repeated brute force against a port
2019-10-08 14:36:57
222.186.175.220 attackspam
Oct  8 02:23:01 xtremcommunity sshd\[303702\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=222.186.175.220  user=root
Oct  8 02:23:03 xtremcommunity sshd\[303702\]: Failed password for root from 222.186.175.220 port 31296 ssh2
Oct  8 02:23:07 xtremcommunity sshd\[303702\]: Failed password for root from 222.186.175.220 port 31296 ssh2
Oct  8 02:23:12 xtremcommunity sshd\[303702\]: Failed password for root from 222.186.175.220 port 31296 ssh2
Oct  8 02:23:16 xtremcommunity sshd\[303702\]: Failed password for root from 222.186.175.220 port 31296 ssh2
...
2019-10-08 14:30:52
191.17.139.235 attackspam
Oct  7 20:30:40 wbs sshd\[4068\]: Invalid user 123Song from 191.17.139.235
Oct  7 20:30:40 wbs sshd\[4068\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=191.17.139.235
Oct  7 20:30:42 wbs sshd\[4068\]: Failed password for invalid user 123Song from 191.17.139.235 port 36360 ssh2
Oct  7 20:35:36 wbs sshd\[4496\]: Invalid user Titan123 from 191.17.139.235
Oct  7 20:35:36 wbs sshd\[4496\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=191.17.139.235
2019-10-08 14:46:25
85.113.210.58 attackspam
Oct  8 03:56:21 unicornsoft sshd\[500\]: User root from 85.113.210.58 not allowed because not listed in AllowUsers
Oct  8 03:56:21 unicornsoft sshd\[500\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=85.113.210.58  user=root
Oct  8 03:56:23 unicornsoft sshd\[500\]: Failed password for invalid user root from 85.113.210.58 port 22850 ssh2
2019-10-08 14:44:33
185.220.101.69 attackspam
Unauthorized access detected from banned ip
2019-10-08 14:27:44
188.165.23.42 attackbotsspam
Oct  8 08:15:19 vps01 sshd[4082]: Failed password for root from 188.165.23.42 port 58266 ssh2
2019-10-08 14:31:05
159.203.201.127 attackbotsspam
Automatic report - Port Scan Attack
2019-10-08 14:21:58
58.210.96.156 attackbotsspam
Oct  8 02:25:19 ny01 sshd[9629]: Failed password for root from 58.210.96.156 port 48513 ssh2
Oct  8 02:29:49 ny01 sshd[10318]: Failed password for root from 58.210.96.156 port 37276 ssh2
2019-10-08 14:40:06

Recently Reported IPs

104.21.67.58 104.21.16.36 104.21.16.57 104.21.16.49
104.21.16.56 104.21.16.58 104.21.16.6 104.21.16.63
104.21.16.64 104.21.16.60 104.21.16.65 104.21.16.38
104.21.16.67 104.21.67.68 104.21.16.8 104.21.16.68
104.21.16.75 104.21.16.86 104.21.16.97 104.21.16.78