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 <<>> 104.21.81.166
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 26120
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;104.21.81.166.			IN	A

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

;; Query time: 59 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Fri Feb 18 03:02:19 CST 2022
;; MSG SIZE  rcvd: 106
Host info
Host 166.81.21.104.in-addr.arpa. not found: 3(NXDOMAIN)
Nslookup info:
Server:		183.60.83.19
Address:	183.60.83.19#53

** server can't find 166.81.21.104.in-addr.arpa: NXDOMAIN
Related IP info:
Related comments:
IP Type Details Datetime
79.30.149.58 attackspam
Sep 11 08:03:48 vps639187 sshd\[2833\]: Invalid user admin from 79.30.149.58 port 64900
Sep 11 08:03:48 vps639187 sshd\[2833\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=79.30.149.58
Sep 11 08:03:50 vps639187 sshd\[2833\]: Failed password for invalid user admin from 79.30.149.58 port 64900 ssh2
...
2020-09-11 14:23:25
179.252.115.215 attackbotsspam
...
2020-09-11 14:04:32
123.30.236.149 attack
123.30.236.149 (VN/Vietnam/-), 6 distributed sshd attacks on account [root] in the last 3600 secs; Ports: *; Direction: inout; Trigger: LF_DISTATTACK; Logs: Sep 10 12:57:14 server5 sshd[24882]: Failed password for root from 178.128.61.101 port 58388 ssh2
Sep 10 12:57:17 server5 sshd[24891]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=68.183.120.37  user=root
Sep 10 12:57:12 server5 sshd[24882]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=178.128.61.101  user=root
Sep 10 12:53:03 server5 sshd[22713]: Failed password for root from 54.38.55.136 port 34870 ssh2
Sep 10 12:56:21 server5 sshd[24154]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=123.30.236.149  user=root
Sep 10 12:56:23 server5 sshd[24154]: Failed password for root from 123.30.236.149 port 11284 ssh2

IP Addresses Blocked:

178.128.61.101 (SG/Singapore/-)
68.183.120.37 (US/United States/-)
54.38.55.136 (PL/Poland/-)
2020-09-11 14:02:50
192.35.168.233 attackspambots
Port scan denied
2020-09-11 14:32:19
221.163.8.108 attackspambots
Sep 11 07:43:22 root sshd[10911]: Failed password for root from 221.163.8.108 port 48664 ssh2
...
2020-09-11 14:39:53
122.156.232.197 attack
Sep 11 04:00:44 vps639187 sshd\[31583\]: Invalid user netman from 122.156.232.197 port 64448
Sep 11 04:00:45 vps639187 sshd\[31583\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=122.156.232.197
Sep 11 04:00:47 vps639187 sshd\[31583\]: Failed password for invalid user netman from 122.156.232.197 port 64448 ssh2
...
2020-09-11 14:20:22
122.100.215.82 attack
Sep 11 01:01:41 ssh2 sshd[78783]: User root from nz215l82.bb122100.ctm.net not allowed because not listed in AllowUsers
Sep 11 01:01:41 ssh2 sshd[78783]: Failed password for invalid user root from 122.100.215.82 port 39552 ssh2
Sep 11 01:01:41 ssh2 sshd[78783]: Connection closed by invalid user root 122.100.215.82 port 39552 [preauth]
...
2020-09-11 14:09:51
186.1.181.242 attackbots
 TCP (SYN) 186.1.181.242:64015 -> port 23, len 44
2020-09-11 14:13:19
112.119.190.70 attackbotsspam
Sep 10 19:06:57 debian64 sshd[28057]: Failed password for root from 112.119.190.70 port 48813 ssh2
...
2020-09-11 14:29:15
220.72.41.77 attack
Sep 10 18:56:40 mail sshd[11665]: Failed password for root from 220.72.41.77 port 56112 ssh2
2020-09-11 14:39:04
109.182.64.172 attack
Attempts against non-existent wp-login
2020-09-11 14:25:25
85.234.166.93 attack
Sep 11 01:01:00 ssh2 sshd[78673]: Invalid user guest from 85.234.166.93 port 58642
Sep 11 01:01:00 ssh2 sshd[78673]: Failed password for invalid user guest from 85.234.166.93 port 58642 ssh2
Sep 11 01:01:00 ssh2 sshd[78673]: Connection closed by invalid user guest 85.234.166.93 port 58642 [preauth]
...
2020-09-11 14:18:20
87.247.87.160 attackspambots
SSH Bruteforce Attempt on Honeypot
2020-09-11 14:39:21
61.177.172.128 attackbotsspam
Sep 11 08:16:23 server sshd[60334]: Failed none for root from 61.177.172.128 port 11007 ssh2
Sep 11 08:16:26 server sshd[60334]: Failed password for root from 61.177.172.128 port 11007 ssh2
Sep 11 08:16:30 server sshd[60334]: Failed password for root from 61.177.172.128 port 11007 ssh2
2020-09-11 14:29:31
195.54.161.246 attack
[MK-VM5] Blocked by UFW
2020-09-11 14:20:38

Recently Reported IPs

104.21.81.165 104.21.81.164 104.21.81.170 104.21.81.17
104.21.81.167 104.21.81.171 104.21.81.173 104.21.81.174
104.21.81.175 104.21.81.176 104.21.81.177 21.227.99.217
104.21.81.18 104.21.81.186 104.21.81.178 104.21.81.185
104.21.81.187 104.21.81.188 104.21.81.191 104.21.81.193