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 <<>> 104.21.51.172
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 43487
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;104.21.51.172.			IN	A

;; AUTHORITY SECTION:
.			158	IN	SOA	a.root-servers.net. nstld.verisign-grs.com. 2022022000 1800 900 604800 86400

;; Query time: 57 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Sun Feb 20 20:35:52 CST 2022
;; MSG SIZE  rcvd: 106
Host info
Host 172.51.21.104.in-addr.arpa. not found: 3(NXDOMAIN)
Nslookup info:
Server:		183.60.83.19
Address:	183.60.83.19#53

** server can't find 172.51.21.104.in-addr.arpa: NXDOMAIN
Related IP info:
Related comments:
IP Type Details Datetime
58.65.205.154 attackspam
Unauthorized connection attempt from IP address 58.65.205.154 on Port 445(SMB)
2020-09-25 01:16:43
112.242.157.39 attackbotsspam
DATE:2020-09-23 20:51:37, IP:112.242.157.39, PORT:telnet Telnet brute force auth on honeypot server (epe-honey1-hq)
2020-09-25 01:28:38
61.177.172.142 attackbots
Automatic report BANNED IP
2020-09-25 01:24:43
112.85.42.227 attackspam
Sep 24 12:53:41 NPSTNNYC01T sshd[3331]: Failed password for root from 112.85.42.227 port 49282 ssh2
Sep 24 12:53:44 NPSTNNYC01T sshd[3331]: Failed password for root from 112.85.42.227 port 49282 ssh2
Sep 24 12:53:47 NPSTNNYC01T sshd[3331]: Failed password for root from 112.85.42.227 port 49282 ssh2
...
2020-09-25 01:19:15
200.250.2.242 attack
Icarus honeypot on github
2020-09-25 01:10:37
159.89.94.13 attack
Port Scan
...
2020-09-25 01:11:21
14.246.214.185 attackbotsspam
Sep 23 14:01:35 logopedia-1vcpu-1gb-nyc1-01 sshd[126863]: Failed password for root from 14.246.214.185 port 54224 ssh2
...
2020-09-25 01:24:07
191.232.172.31 attack
2020-09-24 11:25:05.948280-0500  localhost sshd[14280]: Failed password for root from 191.232.172.31 port 56764 ssh2
2020-09-25 01:18:18
45.180.163.69 attack
Sep 23 23:30:03 askasleikir sshd[83595]: Failed password for root from 45.180.163.69 port 41857 ssh2
Sep 23 23:23:41 askasleikir sshd[83542]: Failed password for invalid user pcguest from 45.180.163.69 port 34593 ssh2
Sep 23 23:36:12 askasleikir sshd[83832]: Failed password for invalid user svnroot from 45.180.163.69 port 26753 ssh2
2020-09-25 01:29:07
79.118.203.39 attackspam
Automatic report - Port Scan Attack
2020-09-25 01:06:25
42.227.166.176 attack
[N10.H2.VM2] Port Scanner Detected Blocked by UFW
2020-09-25 00:55:25
111.72.196.96 attackspam
Sep 23 20:16:37 srv01 postfix/smtpd\[25857\]: warning: unknown\[111.72.196.96\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Sep 23 20:16:48 srv01 postfix/smtpd\[25857\]: warning: unknown\[111.72.196.96\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Sep 23 20:17:04 srv01 postfix/smtpd\[25857\]: warning: unknown\[111.72.196.96\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Sep 23 20:17:23 srv01 postfix/smtpd\[25857\]: warning: unknown\[111.72.196.96\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Sep 23 20:17:34 srv01 postfix/smtpd\[25857\]: warning: unknown\[111.72.196.96\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
...
2020-09-25 00:59:29
122.51.98.36 attackspam
Invalid user lucas from 122.51.98.36 port 50914
2020-09-25 00:58:33
200.84.111.118 attack
Sep 23 14:01:52 logopedia-1vcpu-1gb-nyc1-01 sshd[126928]: Failed password for root from 200.84.111.118 port 36036 ssh2
...
2020-09-25 01:04:26
1.20.151.42 attack
1600880493 - 09/23/2020 19:01:33 Host: 1.20.151.42/1.20.151.42 Port: 445 TCP Blocked
2020-09-25 01:26:49

Recently Reported IPs

123.171.246.2 123.171.247.162 123.171.247.34 123.171.245.41
123.178.164.77 123.171.243.103 123.171.240.45 104.21.51.175
104.21.51.177 104.21.51.196 104.21.51.207 79.1.11.103
104.21.51.211 104.21.51.221 104.21.51.231 123.160.233.64
79.1.100.18 104.21.51.235 104.21.51.250 104.21.51.28