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:
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Dig info:
; <<>> DiG 9.10.3-P4-Ubuntu <<>> 104.21.55.51
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 1680
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;104.21.55.51.			IN	A

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

;; Query time: 59 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Fri Feb 18 00:18:12 CST 2022
;; MSG SIZE  rcvd: 105
Host info
Host 51.55.21.104.in-addr.arpa. not found: 3(NXDOMAIN)
Nslookup info:
Server:		183.60.83.19
Address:	183.60.83.19#53

** server can't find 51.55.21.104.in-addr.arpa: NXDOMAIN
Related IP info:
Related comments:
IP Type Details Datetime
218.92.0.137 attackspam
$f2bV_matches
2019-12-06 15:49:39
218.92.0.195 attackspambots
12/06/2019-02:13:40.753742 218.92.0.195 Protocol: 6 ET SCAN Potential SSH Scan
2019-12-06 15:38:15
147.139.138.183 attackspambots
[ssh] SSH attack
2019-12-06 15:57:57
114.222.187.65 attack
Dec  5 20:22:33 auw2 sshd\[4695\]: Invalid user ident from 114.222.187.65
Dec  5 20:22:33 auw2 sshd\[4695\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=114.222.187.65
Dec  5 20:22:35 auw2 sshd\[4695\]: Failed password for invalid user ident from 114.222.187.65 port 10344 ssh2
Dec  5 20:29:49 auw2 sshd\[5404\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=114.222.187.65  user=backup
Dec  5 20:29:52 auw2 sshd\[5404\]: Failed password for backup from 114.222.187.65 port 12631 ssh2
2019-12-06 15:24:59
222.186.175.181 attackbotsspam
Dec  6 09:00:15 MK-Soft-VM4 sshd[6546]: Failed password for root from 222.186.175.181 port 39050 ssh2
Dec  6 09:00:22 MK-Soft-VM4 sshd[6546]: Failed password for root from 222.186.175.181 port 39050 ssh2
...
2019-12-06 16:00:33
189.112.207.49 attackspam
Dec  6 10:29:31 hosting sshd[5821]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=189.112.207.49  user=ftp
Dec  6 10:29:33 hosting sshd[5821]: Failed password for ftp from 189.112.207.49 port 51880 ssh2
...
2019-12-06 15:53:05
188.166.183.202 attackbots
Automatic report - Banned IP Access
2019-12-06 15:58:58
45.55.184.78 attackspambots
2019-12-06T07:02:33.116572abusebot-6.cloudsearch.cf sshd\[2935\]: Invalid user admin from 45.55.184.78 port 41594
2019-12-06 15:22:28
122.199.152.157 attack
Triggered by Fail2Ban at Vostok web server
2019-12-06 15:42:32
59.72.112.21 attackbots
Invalid user eastick from 59.72.112.21 port 50328
pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=59.72.112.21
Failed password for invalid user eastick from 59.72.112.21 port 50328 ssh2
pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=59.72.112.21  user=root
Failed password for root from 59.72.112.21 port 49082 ssh2
2019-12-06 15:59:44
198.199.122.234 attackbots
Dec  6 07:05:51 zeus sshd[6839]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=198.199.122.234 
Dec  6 07:05:53 zeus sshd[6839]: Failed password for invalid user web from 198.199.122.234 port 42290 ssh2
Dec  6 07:11:09 zeus sshd[7058]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=198.199.122.234 
Dec  6 07:11:11 zeus sshd[7058]: Failed password for invalid user multiplayer from 198.199.122.234 port 47164 ssh2
2019-12-06 15:25:40
106.13.110.74 attackspambots
Dec  6 07:16:02 pi sshd\[1276\]: Invalid user nfs from 106.13.110.74 port 57406
Dec  6 07:16:02 pi sshd\[1276\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.13.110.74
Dec  6 07:16:04 pi sshd\[1276\]: Failed password for invalid user nfs from 106.13.110.74 port 57406 ssh2
Dec  6 07:22:36 pi sshd\[1682\]: Invalid user http from 106.13.110.74 port 59136
Dec  6 07:22:36 pi sshd\[1682\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.13.110.74
...
2019-12-06 15:26:42
45.136.108.65 attackspambots
3389BruteforceFW23
2019-12-06 15:36:15
86.192.220.63 attackspam
Dec  6 07:29:39 MK-Soft-Root2 sshd[3233]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=86.192.220.63 
Dec  6 07:29:41 MK-Soft-Root2 sshd[3233]: Failed password for invalid user carolyn from 86.192.220.63 port 37772 ssh2
...
2019-12-06 15:38:03
149.129.222.60 attackspam
2019-12-06T06:56:59.893095shield sshd\[6991\]: Invalid user marischon from 149.129.222.60 port 46564
2019-12-06T06:56:59.897834shield sshd\[6991\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=149.129.222.60
2019-12-06T06:57:01.952298shield sshd\[6991\]: Failed password for invalid user marischon from 149.129.222.60 port 46564 ssh2
2019-12-06T07:03:47.788808shield sshd\[8366\]: Invalid user ubuntu from 149.129.222.60 port 55550
2019-12-06T07:03:47.793331shield sshd\[8366\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=149.129.222.60
2019-12-06 15:37:17

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