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:
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Dig info:
; <<>> DiG 9.10.3-P4-Ubuntu <<>> 104.21.66.201
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 35049
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;104.21.66.201.			IN	A

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

;; Query time: 16 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Fri Feb 18 02:01:37 CST 2022
;; MSG SIZE  rcvd: 106
Host info
Host 201.66.21.104.in-addr.arpa. not found: 3(NXDOMAIN)
Nslookup info:
Server:		183.60.83.19
Address:	183.60.83.19#53

** server can't find 201.66.21.104.in-addr.arpa: NXDOMAIN
Related IP info:
Related comments:
IP Type Details Datetime
47.11.173.39 attackspambots
Unauthorized connection attempt detected from IP address 47.11.173.39 to port 445
2020-02-17 21:18:50
203.201.62.36 attack
20/2/17@00:38:46: FAIL: Alarm-Network address from=203.201.62.36
20/2/17@00:38:47: FAIL: Alarm-Network address from=203.201.62.36
...
2020-02-17 21:10:03
117.1.244.12 attackspam
Automatic report - Port Scan Attack
2020-02-17 21:14:12
37.187.54.45 attackbotsspam
Feb 17 06:54:45 MK-Soft-VM3 sshd[11495]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=37.187.54.45 
Feb 17 06:54:46 MK-Soft-VM3 sshd[11495]: Failed password for invalid user test2 from 37.187.54.45 port 56566 ssh2
...
2020-02-17 20:36:32
193.169.252.230 attack
SSH login attempts.
2020-02-17 21:13:55
83.172.180.133 attack
SSH login attempts.
2020-02-17 20:45:34
104.47.21.36 attackspambots
SSH login attempts.
2020-02-17 21:06:46
144.160.159.22 attack
SSH login attempts.
2020-02-17 20:59:32
193.94.138.230 attackspambots
<6 unauthorized SSH connections
2020-02-17 21:16:32
162.243.130.135 attack
SSH login attempts.
2020-02-17 20:57:33
190.12.5.38 attackspam
Port probing on unauthorized port 23
2020-02-17 20:50:21
222.186.42.136 attack
Feb 17 14:19:31 MK-Soft-Root2 sshd[6492]: Failed password for root from 222.186.42.136 port 14176 ssh2
Feb 17 14:19:35 MK-Soft-Root2 sshd[6492]: Failed password for root from 222.186.42.136 port 14176 ssh2
...
2020-02-17 21:25:19
176.99.255.31 attackspambots
Port probing on unauthorized port 23
2020-02-17 20:46:36
187.86.14.228 attack
Automatic report - SSH Brute-Force Attack
2020-02-17 21:08:12
144.217.42.212 attackbots
Feb 17 02:53:44 web1 sshd\[6464\]: Invalid user ftpuser from 144.217.42.212
Feb 17 02:53:44 web1 sshd\[6464\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=144.217.42.212
Feb 17 02:53:46 web1 sshd\[6464\]: Failed password for invalid user ftpuser from 144.217.42.212 port 55584 ssh2
Feb 17 02:56:23 web1 sshd\[6721\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=144.217.42.212  user=postfix
Feb 17 02:56:25 web1 sshd\[6721\]: Failed password for postfix from 144.217.42.212 port 44413 ssh2
2020-02-17 21:09:02

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