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:
b
Dig info:
; <<>> DiG 9.10.3-P4-Ubuntu <<>> 104.21.51.121
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 34139
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;104.21.51.121.			IN	A

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

;; Query time: 64 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Thu Feb 17 23:38:32 CST 2022
;; MSG SIZE  rcvd: 106
Host info
Host 121.51.21.104.in-addr.arpa. not found: 3(NXDOMAIN)
Nslookup info:
Server:		183.60.83.19
Address:	183.60.83.19#53

** server can't find 121.51.21.104.in-addr.arpa: NXDOMAIN
Related IP info:
Related comments:
IP Type Details Datetime
36.237.9.109 attackbotsspam
port scan/probe/communication attempt; port 23
2019-11-29 08:00:37
185.101.231.42 attackbots
Nov 28 19:05:29 TORMINT sshd\[13315\]: Invalid user marshburn from 185.101.231.42
Nov 28 19:05:29 TORMINT sshd\[13315\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=185.101.231.42
Nov 28 19:05:31 TORMINT sshd\[13315\]: Failed password for invalid user marshburn from 185.101.231.42 port 52274 ssh2
...
2019-11-29 08:27:32
191.241.242.80 attackbotsspam
Unauthorized connection attempt from IP address 191.241.242.80 on Port 445(SMB)
2019-11-29 08:01:09
203.86.24.203 attackspambots
Nov 28 23:45:22 [host] sshd[19395]: Invalid user culturist from 203.86.24.203
Nov 28 23:45:22 [host] sshd[19395]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=203.86.24.203
Nov 28 23:45:24 [host] sshd[19395]: Failed password for invalid user culturist from 203.86.24.203 port 36702 ssh2
2019-11-29 08:31:22
42.116.118.236 attackbots
Unauthorized connection attempt from IP address 42.116.118.236 on Port 445(SMB)
2019-11-29 08:24:22
133.130.90.174 attackspambots
Nov 28 14:24:54 hpm sshd\[7252\]: Invalid user huong from 133.130.90.174
Nov 28 14:24:54 hpm sshd\[7252\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=v133-130-90-174.a01f.g.tyo1.static.cnode.io
Nov 28 14:24:56 hpm sshd\[7252\]: Failed password for invalid user huong from 133.130.90.174 port 39096 ssh2
Nov 28 14:28:16 hpm sshd\[7526\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=v133-130-90-174.a01f.g.tyo1.static.cnode.io  user=root
Nov 28 14:28:18 hpm sshd\[7526\]: Failed password for root from 133.130.90.174 port 46600 ssh2
2019-11-29 08:32:31
140.213.57.6 attackbotsspam
Unauthorized connection attempt from IP address 140.213.57.6 on Port 445(SMB)
2019-11-29 08:26:42
106.12.183.6 attackbots
ssh failed login
2019-11-29 08:04:10
36.231.218.74 attackbotsspam
port scan/probe/communication attempt; port 23
2019-11-29 08:22:00
128.199.149.152 attack
Nov 29 01:07:27 mail postfix/smtpd[30265]: warning: unknown[128.199.149.152]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Nov 29 01:07:27 mail postfix/smtpd[30576]: warning: unknown[128.199.149.152]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Nov 29 01:10:50 mail postfix/smtpd[31560]: warning: unknown[128.199.149.152]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
2019-11-29 08:18:12
91.121.205.83 attackspam
SSH brutforce
2019-11-29 08:03:40
114.40.161.9 attackbots
Unauthorized connection attempt from IP address 114.40.161.9 on Port 445(SMB)
2019-11-29 08:12:34
208.52.154.124 attackbots
11/28/2019-17:46:08.074623 208.52.154.124 Protocol: 6 ET SCAN NMAP -sS window 1024
2019-11-29 07:53:05
189.186.229.200 attackspambots
Unauthorized connection attempt from IP address 189.186.229.200 on Port 445(SMB)
2019-11-29 08:20:09
146.0.209.72 attackspam
Nov 29 00:11:43 vps647732 sshd[21581]: Failed password for root from 146.0.209.72 port 42192 ssh2
...
2019-11-29 08:02:51

Recently Reported IPs

104.21.51.120 104.21.51.127 104.21.51.128 104.21.51.133
104.21.51.134 104.21.51.136 104.21.51.139 104.21.51.147
104.21.51.15 104.21.51.153 104.21.51.154 104.21.51.155
104.21.51.158 104.21.51.162 104.21.51.164 104.21.51.165
104.21.51.171 104.21.51.174 104.21.51.179 104.21.51.180