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 <<>> 104.21.81.181
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 45775
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;104.21.81.181.			IN	A

;; AUTHORITY SECTION:
.			101	IN	SOA	a.root-servers.net. nstld.verisign-grs.com. 2022021702 1800 900 604800 86400

;; Query time: 97 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Fri Feb 18 10:20:24 CST 2022
;; MSG SIZE  rcvd: 106
Host info
Host 181.81.21.104.in-addr.arpa. not found: 3(NXDOMAIN)
Nslookup info:
Server:		183.60.83.19
Address:	183.60.83.19#53

** server can't find 181.81.21.104.in-addr.arpa: NXDOMAIN
Related IP info:
Related comments:
IP Type Details Datetime
45.143.223.169 attackspam
Feb 25 05:16:25 WHD8 postfix/smtpd\[33660\]: warning: unknown\[45.143.223.169\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Feb 25 05:16:41 WHD8 postfix/smtpd\[33660\]: warning: unknown\[45.143.223.169\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Feb 25 05:17:08 WHD8 postfix/smtpd\[33660\]: warning: unknown\[45.143.223.169\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
...
2020-05-06 02:31:11
60.19.64.10 attackspam
Apr 14 18:42:05 WHD8 postfix/smtpd\[93750\]: warning: unknown\[60.19.64.10\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Apr 14 18:42:14 WHD8 postfix/smtpd\[93750\]: warning: unknown\[60.19.64.10\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Apr 14 18:42:27 WHD8 postfix/smtpd\[93750\]: warning: unknown\[60.19.64.10\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
...
2020-05-06 02:28:40
106.124.131.214 attack
May  5 19:53:50 server sshd[868]: Failed password for root from 106.124.131.214 port 36873 ssh2
May  5 19:55:41 server sshd[1018]: Failed password for invalid user dpn from 106.124.131.214 port 48440 ssh2
May  5 19:57:32 server sshd[1082]: Failed password for invalid user r00t from 106.124.131.214 port 60011 ssh2
2020-05-06 02:38:04
114.67.117.35 attackspambots
May  5 14:14:01 ny01 sshd[13486]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=114.67.117.35
May  5 14:14:03 ny01 sshd[13486]: Failed password for invalid user hpsmh from 114.67.117.35 port 51731 ssh2
May  5 14:17:44 ny01 sshd[13958]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=114.67.117.35
2020-05-06 02:22:14
61.177.172.128 attackbots
May  5 20:39:04 pve1 sshd[1641]: Failed password for root from 61.177.172.128 port 15934 ssh2
May  5 20:39:08 pve1 sshd[1641]: Failed password for root from 61.177.172.128 port 15934 ssh2
...
2020-05-06 02:40:11
180.226.237.233 attack
MultiHost/MultiPort Probe, Scan, Hack -
2020-05-06 02:27:02
45.133.99.6 attack
Apr  3 11:53:37 WHD8 postfix/smtpd\[98091\]: warning: unknown\[45.133.99.6\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Apr  3 11:53:56 WHD8 postfix/smtpd\[98091\]: warning: unknown\[45.133.99.6\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Apr  3 13:01:29 WHD8 postfix/smtpd\[103038\]: warning: unknown\[45.133.99.6\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
...
2020-05-06 02:35:42
78.128.113.70 attack
Mar 11 23:14:28 WHD8 postfix/smtpd\[28632\]: warning: unknown\[78.128.113.70\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Mar 11 23:15:28 WHD8 postfix/smtpd\[28632\]: warning: unknown\[78.128.113.70\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Mar 11 23:15:46 WHD8 postfix/smtpd\[28632\]: warning: unknown\[78.128.113.70\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
...
2020-05-06 02:23:11
144.91.83.203 attackspambots
Lines containing failures of 144.91.83.203
May  4 06:08:21 linuxrulz sshd[2208]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=144.91.83.203  user=r.r
May  4 06:08:22 linuxrulz sshd[2208]: Failed password for r.r from 144.91.83.203 port 60620 ssh2
May  4 06:08:24 linuxrulz sshd[2208]: Received disconnect from 144.91.83.203 port 60620:11: Bye Bye [preauth]
May  4 06:08:24 linuxrulz sshd[2208]: Disconnected from authenticating user r.r 144.91.83.203 port 60620 [preauth]
May  4 06:18:55 linuxrulz sshd[3598]: Invalid user ondrea from 144.91.83.203 port 59142
May  4 06:18:55 linuxrulz sshd[3598]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=144.91.83.203 
May  4 06:18:57 linuxrulz sshd[3598]: Failed password for invalid user ondrea from 144.91.83.203 port 59142 ssh2
May  4 06:18:58 linuxrulz sshd[3598]: Received disconnect from 144.91.83.203 port 59142:11: Bye Bye [preauth]
May  4 06:18:58 li........
------------------------------
2020-05-06 02:24:18
45.143.223.82 attackbotsspam
Jan 27 03:50:21 WHD8 postfix/smtpd\[87167\]: warning: unknown\[45.143.223.82\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jan 27 03:50:27 WHD8 postfix/smtpd\[87160\]: warning: unknown\[45.143.223.82\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jan 27 03:50:37 WHD8 postfix/smtpd\[86859\]: warning: unknown\[45.143.223.82\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jan 27 03:51:00 WHD8 postfix/smtpd\[90566\]: warning: unknown\[45.143.223.82\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jan 27 03:51:06 WHD8 postfix/smtpd\[90570\]: warning: unknown\[45.143.223.82\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jan 27 03:51:16 WHD8 postfix/smtpd\[87108\]: warning: unknown\[45.143.223.82\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jan 27 03:51:40 WHD8 postfix/smtpd\[87160\]: warning: unknown\[45.143.223.82\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jan 27 03:51:46 WHD8 postfix/smtpd\[90552\]: warning: unknown\[45.143.223.82\]: SASL LOGIN authentication faile
...
2020-05-06 02:29:00
69.1.255.176 normal
Email access  attempt
2020-05-06 02:21:10
78.128.113.132 attack
Jan 28 23:38:13 WHD8 postfix/smtpd\[29916\]: warning: unknown\[78.128.113.132\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jan 28 23:38:19 WHD8 postfix/smtpd\[29922\]: warning: unknown\[78.128.113.132\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jan 28 23:38:20 WHD8 postfix/smtpd\[29916\]: warning: unknown\[78.128.113.132\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jan 28 23:38:40 WHD8 postfix/smtpd\[29916\]: warning: unknown\[78.128.113.132\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jan 28 23:38:54 WHD8 postfix/smtpd\[29922\]: warning: unknown\[78.128.113.132\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jan 28 23:39:16 WHD8 postfix/smtpd\[29922\]: warning: unknown\[78.128.113.132\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jan 28 23:39:50 WHD8 postfix/smtpd\[29922\]: warning: unknown\[78.128.113.132\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jan 28 23:39:58 WHD8 postfix/smtpd\[30581\]: warning: unknown\[78.128.113.132\]: SASL LOGIN authenticati
...
2020-05-06 02:28:00
87.251.74.64 attackspam
May  5 20:30:21 debian-2gb-nbg1-2 kernel: \[10962315.102998\] \[UFW BLOCK\] IN=eth0 OUT= MAC=96:00:00:0e:18:f4:d2:74:7f:6e:37:e3:08:00 SRC=87.251.74.64 DST=195.201.40.59 LEN=40 TOS=0x00 PREC=0x00 TTL=245 ID=29580 PROTO=TCP SPT=57596 DPT=20545 WINDOW=1024 RES=0x00 SYN URGP=0
2020-05-06 02:33:43
65.151.163.244 attackspam
May  5 17:57:40 sshgateway sshd\[6916\]: Invalid user drive from 65.151.163.244
May  5 17:57:40 sshgateway sshd\[6916\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=65.151.163.244
May  5 17:57:42 sshgateway sshd\[6916\]: Failed password for invalid user drive from 65.151.163.244 port 16844 ssh2
2020-05-06 02:26:07
219.135.139.243 attackbotsspam
Mar 26 05:43:59 WHD8 postfix/smtpd\[94626\]: warning: unknown\[219.135.139.243\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Apr  6 07:18:50 WHD8 postfix/smtpd\[93580\]: warning: unknown\[219.135.139.243\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Apr  6 07:18:59 WHD8 postfix/smtpd\[93467\]: warning: unknown\[219.135.139.243\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
...
2020-05-06 02:49:23

Recently Reported IPs

13.225.71.88 104.21.80.88 104.21.81.184 104.21.81.163
104.21.81.172 104.21.81.198 104.21.81.192 104.21.81.2
104.21.81.190 104.21.81.208 104.21.81.19 104.21.81.216
104.21.81.221 104.21.81.210 104.21.81.200 13.225.71.89
104.21.81.215 104.21.81.218 104.21.81.237 104.21.81.27