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 <<>> 104.21.54.81
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 644
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;104.21.54.81.			IN	A

;; AUTHORITY SECTION:
.			167	IN	SOA	a.root-servers.net. nstld.verisign-grs.com. 2022022001 1800 900 604800 86400

;; Query time: 19 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Mon Feb 21 05:24:14 CST 2022
;; MSG SIZE  rcvd: 105
Host info
Host 81.54.21.104.in-addr.arpa. not found: 3(NXDOMAIN)
Nslookup info:
Server:		183.60.83.19
Address:	183.60.83.19#53

** server can't find 81.54.21.104.in-addr.arpa: NXDOMAIN
Related IP info:
Related comments:
IP Type Details Datetime
185.153.198.249 attackbots
[MK-VM5] Blocked by UFW
2020-04-14 20:55:33
155.138.135.1 attackspambots
SIPVicious Scanner Detection
2020-04-14 20:51:08
138.197.216.120 attackspam
Masscan Port Scanning Tool Detection
2020-04-14 20:54:25
45.155.125.123 attackspam
from bottlesenior.icu (camsa.mozambia.com [45.155.125.123]) by cauvin.org with ESMTP ; Tue, 14 Apr 2020 07:14:07 -0500
2020-04-14 20:49:29
113.186.237.1 attack
Unauthorized connection attempt from IP address 113.186.237.1 on Port 445(SMB)
2020-04-14 20:46:04
148.105.12.80 attackspambots
Attempted to connect 4 times to port 1647 TCP
2020-04-14 20:54:11
180.76.179.77 attackspam
Apr 14 12:07:13 ip-172-31-62-245 sshd\[12731\]: Failed password for root from 180.76.179.77 port 40774 ssh2\
Apr 14 12:11:13 ip-172-31-62-245 sshd\[12847\]: Invalid user paypals from 180.76.179.77\
Apr 14 12:11:15 ip-172-31-62-245 sshd\[12847\]: Failed password for invalid user paypals from 180.76.179.77 port 37478 ssh2\
Apr 14 12:15:19 ip-172-31-62-245 sshd\[12899\]: Invalid user admin from 180.76.179.77\
Apr 14 12:15:20 ip-172-31-62-245 sshd\[12899\]: Failed password for invalid user admin from 180.76.179.77 port 34180 ssh2\
2020-04-14 21:07:14
187.72.104.129 attackbotsspam
1586866547 - 04/14/2020 14:15:47 Host: 187.72.104.129/187.72.104.129 Port: 445 TCP Blocked
2020-04-14 20:31:59
195.154.199.199 attackbots
SIPVicious Scanner Detection
2020-04-14 20:52:58
51.91.100.205 attackspambots
Apr 14 14:15:15 * sshd[15619]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.91.100.205
Apr 14 14:15:16 * sshd[15619]: Failed password for invalid user 123456 from 51.91.100.205 port 52262 ssh2
2020-04-14 21:13:19
40.117.102.205 attackbotsspam
fail2ban - Attack against Apache (too many 404s)
2020-04-14 20:37:41
5.157.85.64 attack
Apr 14 14:44:26 sticky sshd\[29386\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=5.157.85.64  user=root
Apr 14 14:44:28 sticky sshd\[29386\]: Failed password for root from 5.157.85.64 port 57400 ssh2
Apr 14 14:48:40 sticky sshd\[29394\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=5.157.85.64  user=root
Apr 14 14:48:42 sticky sshd\[29394\]: Failed password for root from 5.157.85.64 port 41360 ssh2
Apr 14 14:52:55 sticky sshd\[29414\]: Invalid user admin from 5.157.85.64 port 53552
Apr 14 14:52:55 sticky sshd\[29414\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=5.157.85.64
...
2020-04-14 21:09:58
103.145.12.75 attackspam
SIP Server BruteForce Attack
2020-04-14 20:52:12
222.186.175.167 attackspam
Apr 14 14:58:08 santamaria sshd\[30764\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=222.186.175.167  user=root
Apr 14 14:58:10 santamaria sshd\[30764\]: Failed password for root from 222.186.175.167 port 23194 ssh2
Apr 14 14:58:26 santamaria sshd\[30780\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=222.186.175.167  user=root
...
2020-04-14 21:00:01
2.7.196.5 attackbotsspam
Apr 14 14:15:28 vps sshd[17629]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=2.7.196.5 
Apr 14 14:15:28 vps sshd[17631]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=2.7.196.5 
Apr 14 14:15:30 vps sshd[17629]: Failed password for invalid user pi from 2.7.196.5 port 47550 ssh2
...
2020-04-14 20:45:12

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