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 of America (the)

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 <<>> 21.37.104.166
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 28180
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;21.37.104.166.			IN	A

;; AUTHORITY SECTION:
.			30	IN	SOA	a.root-servers.net. nstld.verisign-grs.com. 2025020600 1800 900 604800 86400

;; Query time: 13 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Thu Feb 06 23:42:57 CST 2025
;; MSG SIZE  rcvd: 106
Host info
Host 166.104.37.21.in-addr.arpa. not found: 3(NXDOMAIN)
Nslookup info:
Server:		183.60.83.19
Address:	183.60.83.19#53

** server can't find 166.104.37.21.in-addr.arpa: NXDOMAIN
Related IP info:
Related comments:
IP Type Details Datetime
103.18.242.37 attackspambots
Oct  4 03:01:05 mail.srvfarm.net postfix/smtpd[696518]: warning: unknown[103.18.242.37]: SASL PLAIN authentication failed: 
Oct  4 03:01:05 mail.srvfarm.net postfix/smtpd[696518]: lost connection after AUTH from unknown[103.18.242.37]
Oct  4 03:07:34 mail.srvfarm.net postfix/smtpd[700724]: warning: unknown[103.18.242.37]: SASL PLAIN authentication failed: 
Oct  4 03:07:34 mail.srvfarm.net postfix/smtpd[700724]: lost connection after AUTH from unknown[103.18.242.37]
Oct  4 03:07:46 mail.srvfarm.net postfix/smtps/smtpd[697233]: warning: unknown[103.18.242.37]: SASL PLAIN authentication failed:
2020-10-05 05:34:17
23.97.180.45 attackbots
Coordinated SSH brute-force attack from different IPs. pam_unix(sshd:auth):
2020-10-05 05:13:12
45.142.120.38 attackspambots
Oct  4 23:24:20 srv01 postfix/smtpd\[23936\]: warning: unknown\[45.142.120.38\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Oct  4 23:24:20 srv01 postfix/smtpd\[27975\]: warning: unknown\[45.142.120.38\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Oct  4 23:24:27 srv01 postfix/smtpd\[29093\]: warning: unknown\[45.142.120.38\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Oct  4 23:24:30 srv01 postfix/smtpd\[27975\]: warning: unknown\[45.142.120.38\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Oct  4 23:24:33 srv01 postfix/smtpd\[23936\]: warning: unknown\[45.142.120.38\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
...
2020-10-05 05:40:25
123.149.211.140 attackbotsspam
Lines containing failures of 123.149.211.140 (max 1000)
Oct  3 19:22:20 UTC__SANYALnet-Labs__cac1 sshd[22204]: Connection from 123.149.211.140 port 5243 on 64.137.179.160 port 22
Oct  3 19:22:21 UTC__SANYALnet-Labs__cac1 sshd[22204]: Invalid user admin from 123.149.211.140 port 5243
Oct  3 19:22:21 UTC__SANYALnet-Labs__cac1 sshd[22204]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=123.149.211.140
Oct  3 19:22:23 UTC__SANYALnet-Labs__cac1 sshd[22204]: Failed password for invalid user admin from 123.149.211.140 port 5243 ssh2
Oct  3 19:22:23 UTC__SANYALnet-Labs__cac1 sshd[22204]: Received disconnect from 123.149.211.140 port 5243:11: Bye Bye [preauth]
Oct  3 19:22:23 UTC__SANYALnet-Labs__cac1 sshd[22204]: Disconnected from 123.149.211.140 port 5243 [preauth]
Oct  3 19:25:38 UTC__SANYALnet-Labs__cac1 sshd[22319]: Connection from 123.149.211.140 port 5360 on 64.137.179.160 port 22
Oct  3 19:25:40 UTC__SANYALnet-Labs__cac1 sshd[22319........
------------------------------
2020-10-05 05:15:58
45.142.120.53 attackbots
Oct  4 22:25:11 nlmail01.srvfarm.net postfix/smtpd[519323]: warning: unknown[45.142.120.53]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Oct  4 22:25:16 nlmail01.srvfarm.net postfix/smtpd[519344]: warning: unknown[45.142.120.53]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Oct  4 22:25:18 nlmail01.srvfarm.net postfix/smtpd[519339]: warning: unknown[45.142.120.53]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Oct  4 22:25:26 nlmail01.srvfarm.net postfix/smtpd[519323]: warning: unknown[45.142.120.53]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Oct  4 22:25:30 nlmail01.srvfarm.net postfix/smtpd[519363]: warning: unknown[45.142.120.53]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
2020-10-05 05:39:59
2a02:c207:3003:4903::1 attackbotsspam
ENG,WP GET /wp-login.php
2020-10-05 05:16:36
139.59.212.248 attack
Oct  4 22:32:46 web01.agentur-b-2.de postfix/smtpd[1795543]: warning: unknown[139.59.212.248]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Oct  4 22:32:46 web01.agentur-b-2.de postfix/smtpd[1795543]: lost connection after AUTH from unknown[139.59.212.248]
Oct  4 22:36:31 web01.agentur-b-2.de postfix/smtpd[1795503]: warning: unknown[139.59.212.248]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Oct  4 22:36:31 web01.agentur-b-2.de postfix/smtpd[1795503]: lost connection after AUTH from unknown[139.59.212.248]
Oct  4 22:37:20 web01.agentur-b-2.de postfix/smtpd[1795498]: warning: unknown[139.59.212.248]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Oct  4 22:37:20 web01.agentur-b-2.de postfix/smtpd[1795498]: lost connection after AUTH from unknown[139.59.212.248]
2020-10-05 05:31:26
51.91.99.233 attack
Trolling for resource vulnerabilities
2020-10-05 05:42:10
212.70.149.83 attack
Oct  4 23:20:54 srv01 postfix/smtpd\[22497\]: warning: unknown\[212.70.149.83\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Oct  4 23:20:57 srv01 postfix/smtpd\[27970\]: warning: unknown\[212.70.149.83\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Oct  4 23:21:01 srv01 postfix/smtpd\[27978\]: warning: unknown\[212.70.149.83\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Oct  4 23:21:03 srv01 postfix/smtpd\[27975\]: warning: unknown\[212.70.149.83\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Oct  4 23:21:20 srv01 postfix/smtpd\[27975\]: warning: unknown\[212.70.149.83\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
...
2020-10-05 05:25:01
49.88.223.137 attack
MAIL: User Login Brute Force Attempt
2020-10-05 05:15:21
187.85.207.244 attack
Oct  3 22:24:43 mail.srvfarm.net postfix/smtpd[660374]: warning: unknown[187.85.207.244]: SASL PLAIN authentication failed: 
Oct  3 22:24:44 mail.srvfarm.net postfix/smtpd[660374]: lost connection after AUTH from unknown[187.85.207.244]
Oct  3 22:28:33 mail.srvfarm.net postfix/smtpd[660366]: warning: unknown[187.85.207.244]: SASL PLAIN authentication failed: 
Oct  3 22:28:33 mail.srvfarm.net postfix/smtpd[660366]: lost connection after AUTH from unknown[187.85.207.244]
Oct  3 22:33:34 mail.srvfarm.net postfix/smtpd[661686]: warning: unknown[187.85.207.244]: SASL PLAIN authentication failed:
2020-10-05 05:18:47
88.208.80.33 attackbotsspam
$f2bV_matches
2020-10-05 05:21:51
190.181.84.8 attack
Oct  3 22:24:53 mail.srvfarm.net postfix/smtpd[661692]: warning: unknown[190.181.84.8]: SASL PLAIN authentication failed: 
Oct  3 22:24:53 mail.srvfarm.net postfix/smtpd[661692]: lost connection after AUTH from unknown[190.181.84.8]
Oct  3 22:26:11 mail.srvfarm.net postfix/smtps/smtpd[663268]: warning: unknown[190.181.84.8]: SASL PLAIN authentication failed: 
Oct  3 22:26:12 mail.srvfarm.net postfix/smtps/smtpd[663268]: lost connection after AUTH from unknown[190.181.84.8]
Oct  3 22:33:06 mail.srvfarm.net postfix/smtps/smtpd[664799]: warning: unknown[190.181.84.8]: SASL PLAIN authentication failed:
2020-10-05 05:17:51
13.76.251.4 attackspam
Oct  3 22:23:39 mail.srvfarm.net postfix/smtpd[660366]: NOQUEUE: reject: RCPT from unknown[13.76.251.4]: 450 4.7.1 : Helo command rejected: Host not found; from=<> to= proto=ESMTP helo=
Oct  3 22:25:31 mail.srvfarm.net postfix/smtpd[661688]: NOQUEUE: reject: RCPT from unknown[13.76.251.4]: 450 4.7.1 : Helo command rejected: Host not found; from=<> to= proto=ESMTP helo=
Oct  3 22:27:55 mail.srvfarm.net postfix/smtpd[660367]: NOQUEUE: reject: RCPT from unknown[13.76.251.4]: 450 4.7.1 : Helo command rejected: Host not found; from=<> to= proto=ESMTP helo=
Oct  3 22:30:34 mail.srvfarm.net postfix/smtpd[660366]: NOQUEUE: reject: RCPT from unknown[13.76.251.4]: 450 4.7.1 : Helo command rejected: Host not found; from=<> to= proto=ESMTP helo=
Oct  3 22:3
2020-10-05 05:24:12
45.228.254.168 attackspam
Oct  3 22:17:52 mail.srvfarm.net postfix/smtpd[660363]: warning: unknown[45.228.254.168]: SASL PLAIN authentication failed: 
Oct  3 22:17:53 mail.srvfarm.net postfix/smtpd[660363]: lost connection after AUTH from unknown[45.228.254.168]
Oct  3 22:20:06 mail.srvfarm.net postfix/smtps/smtpd[660131]: warning: unknown[45.228.254.168]: SASL PLAIN authentication failed: 
Oct  3 22:20:06 mail.srvfarm.net postfix/smtps/smtpd[660131]: lost connection after AUTH from unknown[45.228.254.168]
Oct  3 22:26:24 mail.srvfarm.net postfix/smtps/smtpd[658122]: warning: unknown[45.228.254.168]: SASL PLAIN authentication failed:
2020-10-05 05:37:29

Recently Reported IPs

126.156.137.134 53.97.79.12 245.166.91.69 191.132.63.5
87.19.240.54 126.177.82.10 248.109.127.215 69.69.113.47
62.154.208.72 146.135.127.156 103.47.54.105 174.111.81.177
255.255.115.178 171.138.124.5 176.186.60.147 249.12.63.139
38.96.174.236 186.180.196.240 87.44.203.96 37.233.163.218