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:
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Dig info:
; <<>> DiG 9.10.3-P4-Ubuntu <<>> 104.21.73.66
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 11970
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;104.21.73.66.			IN	A

;; AUTHORITY SECTION:
.			451	IN	SOA	a.root-servers.net. nstld.verisign-grs.com. 2022021701 1800 900 604800 86400

;; Query time: 42 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Fri Feb 18 02:52:33 CST 2022
;; MSG SIZE  rcvd: 105
Host info
Host 66.73.21.104.in-addr.arpa. not found: 3(NXDOMAIN)
Nslookup info:
Server:		183.60.83.19
Address:	183.60.83.19#53

** server can't find 66.73.21.104.in-addr.arpa: NXDOMAIN
Related IP info:
Related comments:
IP Type Details Datetime
115.230.32.210 attackspambots
Jul  5 20:04:09 rigel postfix/smtpd[1294]: connect from unknown[115.230.32.210]
Jul  5 20:04:13 rigel postfix/smtpd[1294]: lost connection after CONNECT from unknown[115.230.32.210]
Jul  5 20:04:13 rigel postfix/smtpd[1294]: disconnect from unknown[115.230.32.210]
Jul  5 20:04:14 rigel postfix/smtpd[547]: connect from unknown[115.230.32.210]
Jul  5 20:04:21 rigel postfix/smtpd[547]: warning: unknown[115.230.32.210]: SASL LOGIN authentication failed: authentication failure
Jul  5 20:04:23 rigel postfix/smtpd[547]: lost connection after AUTH from unknown[115.230.32.210]
Jul  5 20:04:23 rigel postfix/smtpd[547]: disconnect from unknown[115.230.32.210]
Jul  5 20:04:24 rigel postfix/smtpd[547]: connect from unknown[115.230.32.210]
Jul  5 20:04:29 rigel postfix/smtpd[547]: warning: unknown[115.230.32.210]: SASL LOGIN authentication failed: authentication failure
Jul  5 20:04:41 rigel postfix/smtpd[547]: lost connection after AUTH from unknown[115.230.32.210]
Jul  5 20:04:41 r........
-------------------------------
2019-07-06 03:06:44
114.226.144.52 attackspam
firewall-block, port(s): 139/tcp
2019-07-06 03:11:19
37.239.66.13 attackspambots
Autoban   37.239.66.13 AUTH/CONNECT
2019-07-06 03:02:15
196.52.43.106 attackspam
Port scan: Attack repeated for 24 hours
2019-07-06 03:09:54
185.234.219.105 attack
f2b trigger Multiple SASL failures
2019-07-06 02:50:28
104.236.244.98 attackspam
Jul  5 18:46:30 localhost sshd\[125683\]: Invalid user postgres from 104.236.244.98 port 41436
Jul  5 18:46:30 localhost sshd\[125683\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=104.236.244.98
Jul  5 18:46:32 localhost sshd\[125683\]: Failed password for invalid user postgres from 104.236.244.98 port 41436 ssh2
Jul  5 18:49:44 localhost sshd\[125773\]: Invalid user ecqadmin from 104.236.244.98 port 38626
Jul  5 18:49:44 localhost sshd\[125773\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=104.236.244.98
...
2019-07-06 03:08:37
141.85.13.6 attackbots
Tried sshing with brute force.
2019-07-06 02:42:41
117.85.57.198 attackspambots
SASL broute force
2019-07-06 02:52:20
14.161.16.62 attackspambots
Jul  5 20:34:12 OPSO sshd\[19831\]: Invalid user joomla from 14.161.16.62 port 47002
Jul  5 20:34:12 OPSO sshd\[19831\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=14.161.16.62
Jul  5 20:34:15 OPSO sshd\[19831\]: Failed password for invalid user joomla from 14.161.16.62 port 47002 ssh2
Jul  5 20:36:49 OPSO sshd\[20387\]: Invalid user gan from 14.161.16.62 port 44256
Jul  5 20:36:49 OPSO sshd\[20387\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=14.161.16.62
2019-07-06 02:47:58
188.166.111.5 attackspambots
Unauthorised access (Jul  5) SRC=188.166.111.5 LEN=40 TTL=57 ID=4780 TCP DPT=8080 WINDOW=2893 SYN
2019-07-06 03:03:06
190.111.239.48 attackspam
Jul  5 20:33:09 giegler sshd[19157]: Invalid user ethos from 190.111.239.48 port 57600
2019-07-06 02:53:32
58.47.177.167 attackspam
Portscan or hack attempt detected by psad/fwsnort
2019-07-06 03:22:49
109.203.182.213 attackspambots
05.07.2019 20:10:55 - Login Fail on hMailserver 
Detected by ELinOX-hMail-A2F
2019-07-06 02:51:41
178.128.3.152 attackspam
IP attempted unauthorised action
2019-07-06 02:48:26
213.32.122.80 attackbots
05.07.2019 18:10:42 Connection to port 445 blocked by firewall
2019-07-06 02:58:24

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