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 <<>> 104.21.57.51
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 55990
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;104.21.57.51.			IN	A

;; AUTHORITY SECTION:
.			441	IN	SOA	a.root-servers.net. nstld.verisign-grs.com. 2022021700 1800 900 604800 86400

;; Query time: 67 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Fri Feb 18 00:35:23 CST 2022
;; MSG SIZE  rcvd: 105
Host info
Host 51.57.21.104.in-addr.arpa. not found: 3(NXDOMAIN)
Nslookup info:
Server:		183.60.83.19
Address:	183.60.83.19#53

** server can't find 51.57.21.104.in-addr.arpa: NXDOMAIN
Related IP info:
Related comments:
IP Type Details Datetime
152.136.102.131 attack
Nov 20 18:55:02 ms-srv sshd[59785]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=152.136.102.131
Nov 20 18:55:04 ms-srv sshd[59785]: Failed password for invalid user test from 152.136.102.131 port 37452 ssh2
2020-02-15 21:55:05
193.35.48.51 attackspam
2020-02-15 15:02:57 dovecot_login authenticator failed for \(\[193.35.48.51\]\) \[193.35.48.51\]: 535 Incorrect authentication data
2020-02-15 15:03:07 dovecot_login authenticator failed for \(\[193.35.48.51\]\) \[193.35.48.51\]: 535 Incorrect authentication data
2020-02-15 15:03:12 dovecot_login authenticator failed for \(\[193.35.48.51\]\) \[193.35.48.51\]: 535 Incorrect authentication data
2020-02-15 15:03:23 dovecot_login authenticator failed for \(\[193.35.48.51\]\) \[193.35.48.51\]: 535 Incorrect authentication data
2020-02-15 15:03:29 dovecot_login authenticator failed for \(\[193.35.48.51\]\) \[193.35.48.51\]: 535 Incorrect authentication data
2020-02-15 22:16:32
68.116.41.6 attackspambots
2020-02-15T08:37:45.7158381495-001 sshd[37807]: Invalid user administration1234 from 68.116.41.6 port 44558
2020-02-15T08:37:45.7190121495-001 sshd[37807]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=68-116-41-6.static.mdfd.or.charter.com
2020-02-15T08:37:45.7158381495-001 sshd[37807]: Invalid user administration1234 from 68.116.41.6 port 44558
2020-02-15T08:37:47.8169101495-001 sshd[37807]: Failed password for invalid user administration1234 from 68.116.41.6 port 44558 ssh2
2020-02-15T08:39:09.6570741495-001 sshd[37885]: Invalid user GLsp1$foo!AMG from 68.116.41.6 port 57826
2020-02-15T08:39:09.6602671495-001 sshd[37885]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=68-116-41-6.static.mdfd.or.charter.com
2020-02-15T08:39:09.6570741495-001 sshd[37885]: Invalid user GLsp1$foo!AMG from 68.116.41.6 port 57826
2020-02-15T08:39:11.6230151495-001 sshd[37885]: Failed password for invalid user GLsp1$foo!AMG 
...
2020-02-15 22:00:06
166.170.221.199 attackspambots
Brute forcing email accounts
2020-02-15 21:38:44
119.29.246.210 attack
Feb 15 09:31:19 silence02 sshd[21086]: Failed password for root from 119.29.246.210 port 55426 ssh2
Feb 15 09:34:04 silence02 sshd[21219]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=119.29.246.210
Feb 15 09:34:06 silence02 sshd[21219]: Failed password for invalid user nagios from 119.29.246.210 port 43106 ssh2
2020-02-15 21:43:31
180.176.74.178 attackspam
SS5,WP GET /wp-login.php
2020-02-15 21:52:55
212.64.11.188 attackspam
Jan 26 19:45:00 ms-srv sshd[61878]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=212.64.11.188  user=backup
Jan 26 19:45:02 ms-srv sshd[61878]: Failed password for invalid user backup from 212.64.11.188 port 46272 ssh2
2020-02-15 22:01:26
128.199.204.164 attackspambots
Feb 15 08:40:18 plusreed sshd[412]: Invalid user secdemo from 128.199.204.164
Feb 15 08:40:18 plusreed sshd[412]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=128.199.204.164
Feb 15 08:40:18 plusreed sshd[412]: Invalid user secdemo from 128.199.204.164
Feb 15 08:40:20 plusreed sshd[412]: Failed password for invalid user secdemo from 128.199.204.164 port 35130 ssh2
Feb 15 08:53:56 plusreed sshd[3932]: Invalid user saeum from 128.199.204.164
...
2020-02-15 22:18:52
178.128.154.236 attackspam
$f2bV_matches
2020-02-15 21:40:03
23.94.22.131 attackspam
scan r
2020-02-15 21:52:17
220.191.208.204 attackspambots
Feb 15 09:33:36 serwer sshd\[20563\]: Invalid user bsb from 220.191.208.204 port 48268
Feb 15 09:33:36 serwer sshd\[20563\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=220.191.208.204
Feb 15 09:33:38 serwer sshd\[20563\]: Failed password for invalid user bsb from 220.191.208.204 port 48268 ssh2
...
2020-02-15 21:46:59
118.233.171.106 attackbots
20/2/15@08:54:05: FAIL: IoT-Telnet address from=118.233.171.106
...
2020-02-15 22:06:12
58.20.129.76 attackbots
Feb 15 14:51:19 sd-53420 sshd\[28636\]: Invalid user rohr from 58.20.129.76
Feb 15 14:51:19 sd-53420 sshd\[28636\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=58.20.129.76
Feb 15 14:51:22 sd-53420 sshd\[28636\]: Failed password for invalid user rohr from 58.20.129.76 port 49303 ssh2
Feb 15 14:54:07 sd-53420 sshd\[28838\]: Invalid user zhouh from 58.20.129.76
Feb 15 14:54:07 sd-53420 sshd\[28838\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=58.20.129.76
...
2020-02-15 22:02:53
94.225.68.92 attackspambots
$f2bV_matches
2020-02-15 21:38:06
222.186.42.155 attackspam
Feb 15 14:41:15 h2177944 sshd\[14661\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=222.186.42.155  user=root
Feb 15 14:41:18 h2177944 sshd\[14661\]: Failed password for root from 222.186.42.155 port 25470 ssh2
Feb 15 14:41:21 h2177944 sshd\[14661\]: Failed password for root from 222.186.42.155 port 25470 ssh2
Feb 15 14:41:24 h2177944 sshd\[14661\]: Failed password for root from 222.186.42.155 port 25470 ssh2
...
2020-02-15 21:43:03

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