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 <<>> 104.21.51.52
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 38031
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;104.21.51.52.			IN	A

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

;; Query time: 24 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Fri Feb 18 02:35:27 CST 2022
;; MSG SIZE  rcvd: 105
Host info
Host 52.51.21.104.in-addr.arpa. not found: 3(NXDOMAIN)
Nslookup info:
Server:		183.60.83.19
Address:	183.60.83.19#53

** server can't find 52.51.21.104.in-addr.arpa: NXDOMAIN
Related IP info:
Related comments:
IP Type Details Datetime
200.145.153.172 attackspam
Sep 24 17:17:56 plusreed sshd[26801]: Invalid user tx from 200.145.153.172
Sep 24 17:17:56 plusreed sshd[26801]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=200.145.153.172
Sep 24 17:17:56 plusreed sshd[26801]: Invalid user tx from 200.145.153.172
Sep 24 17:17:58 plusreed sshd[26801]: Failed password for invalid user tx from 200.145.153.172 port 53520 ssh2
...
2019-09-25 05:25:11
218.92.0.147 attack
SSH authentication failure x 6 reported by Fail2Ban
...
2019-09-25 05:49:34
218.78.72.97 attackbots
2019-09-25 05:41:01
107.170.20.247 attackspambots
Sep 24 11:25:06 aiointranet sshd\[20515\]: Invalid user anton from 107.170.20.247
Sep 24 11:25:06 aiointranet sshd\[20515\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=107.170.20.247
Sep 24 11:25:08 aiointranet sshd\[20515\]: Failed password for invalid user anton from 107.170.20.247 port 48224 ssh2
Sep 24 11:29:22 aiointranet sshd\[20838\]: Invalid user aecpro from 107.170.20.247
Sep 24 11:29:22 aiointranet sshd\[20838\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=107.170.20.247
2019-09-25 05:38:29
78.128.113.114 attackbotsspam
Sep 24 23:10:21 relay postfix/smtpd\[2164\]: warning: unknown\[78.128.113.114\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Sep 24 23:14:46 relay postfix/smtpd\[2183\]: warning: unknown\[78.128.113.114\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Sep 24 23:14:53 relay postfix/smtpd\[2164\]: warning: unknown\[78.128.113.114\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Sep 24 23:29:46 relay postfix/smtpd\[2181\]: warning: unknown\[78.128.113.114\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Sep 24 23:29:53 relay postfix/smtpd\[2183\]: warning: unknown\[78.128.113.114\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
...
2019-09-25 05:47:55
110.54.238.225 attackspambots
HTTP wp-login.php - 110.54.238.225
2019-09-25 05:49:12
2.94.155.200 attackspam
Unauthorized connection attempt from IP address 2.94.155.200 on Port 445(SMB)
2019-09-25 05:10:37
106.12.203.210 attack
Brute force attempt
2019-09-25 05:14:58
218.94.136.90 attackspam
auto-add
2019-09-25 05:24:02
115.231.73.154 attackspam
Sep 24 11:14:17 friendsofhawaii sshd\[17804\]: Invalid user sitadmin from 115.231.73.154
Sep 24 11:14:17 friendsofhawaii sshd\[17804\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=115.231.73.154
Sep 24 11:14:18 friendsofhawaii sshd\[17804\]: Failed password for invalid user sitadmin from 115.231.73.154 port 44876 ssh2
Sep 24 11:18:03 friendsofhawaii sshd\[18119\]: Invalid user KBF1 from 115.231.73.154
Sep 24 11:18:03 friendsofhawaii sshd\[18119\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=115.231.73.154
2019-09-25 05:22:10
62.193.6.15 attackbots
*Port Scan* detected from 62.193.6.15 (IR/Iran/62.193.6.15.dpi.ir). 4 hits in the last 50 seconds
2019-09-25 05:34:04
189.112.170.65 attackspambots
Unauthorized connection attempt from IP address 189.112.170.65 on Port 445(SMB)
2019-09-25 05:18:20
2.50.165.139 attack
Unauthorized connection attempt from IP address 2.50.165.139 on Port 445(SMB)
2019-09-25 05:12:22
139.59.249.255 attack
Sep 24 23:10:57 markkoudstaal sshd[19740]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=139.59.249.255
Sep 24 23:10:59 markkoudstaal sshd[19740]: Failed password for invalid user kitty from 139.59.249.255 port 52416 ssh2
Sep 24 23:19:28 markkoudstaal sshd[20454]: Failed password for root from 139.59.249.255 port 59625 ssh2
2019-09-25 05:38:03
212.112.108.98 attack
Sep 25 00:13:57 server sshd\[11943\]: Invalid user mailtest from 212.112.108.98 port 50438
Sep 25 00:13:57 server sshd\[11943\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=212.112.108.98
Sep 25 00:13:59 server sshd\[11943\]: Failed password for invalid user mailtest from 212.112.108.98 port 50438 ssh2
Sep 25 00:17:53 server sshd\[9332\]: Invalid user nagios1 from 212.112.108.98 port 33296
Sep 25 00:17:53 server sshd\[9332\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=212.112.108.98
2019-09-25 05:29:28

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