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 <<>> 21.166.99.51
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 17097
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;21.166.99.51.			IN	A

;; AUTHORITY SECTION:
.			30	IN	SOA	a.root-servers.net. nstld.verisign-grs.com. 2025071201 1800 900 604800 86400

;; Query time: 14 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Sun Jul 13 11:08:20 CST 2025
;; MSG SIZE  rcvd: 105
Host info
Host 51.99.166.21.in-addr.arpa. not found: 3(NXDOMAIN)
Nslookup info:
Server:		183.60.83.19
Address:	183.60.83.19#53

** server can't find 51.99.166.21.in-addr.arpa: NXDOMAIN
Related IP info:
Related comments:
IP Type Details Datetime
219.137.226.52 attackbots
Sep 11 17:53:30 hiderm sshd\[14679\]: Invalid user odoo from 219.137.226.52
Sep 11 17:53:30 hiderm sshd\[14679\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=219.137.226.52
Sep 11 17:53:31 hiderm sshd\[14679\]: Failed password for invalid user odoo from 219.137.226.52 port 28865 ssh2
Sep 11 17:58:43 hiderm sshd\[15134\]: Invalid user webdata from 219.137.226.52
Sep 11 17:58:43 hiderm sshd\[15134\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=219.137.226.52
2019-09-12 12:21:48
80.211.178.170 attack
2019-09-12T04:34:00.056859abusebot-2.cloudsearch.cf sshd\[31862\]: Invalid user tomcat from 80.211.178.170 port 52740
2019-09-12 12:38:11
182.113.149.255 attack
port scan and connect, tcp 22 (ssh)
2019-09-12 12:25:37
139.217.102.155 attack
Sep 12 03:58:53 MK-Soft-VM5 sshd\[12431\]: Invalid user bot from 139.217.102.155 port 36422
Sep 12 03:58:53 MK-Soft-VM5 sshd\[12431\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=139.217.102.155
Sep 12 03:58:54 MK-Soft-VM5 sshd\[12431\]: Failed password for invalid user bot from 139.217.102.155 port 36422 ssh2
...
2019-09-12 12:08:03
167.114.115.22 attackspam
Sep 12 05:53:15 SilenceServices sshd[1396]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=167.114.115.22
Sep 12 05:53:18 SilenceServices sshd[1396]: Failed password for invalid user uftp from 167.114.115.22 port 34476 ssh2
Sep 12 05:58:35 SilenceServices sshd[3401]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=167.114.115.22
2019-09-12 12:29:27
188.166.186.189 attack
2019-09-12T04:34:01.677720abusebot-4.cloudsearch.cf sshd\[28416\]: Invalid user user from 188.166.186.189 port 53994
2019-09-12 12:51:52
23.96.113.95 attackbots
Sep 12 05:52:47 v22019058497090703 sshd[4882]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=23.96.113.95
Sep 12 05:52:49 v22019058497090703 sshd[4882]: Failed password for invalid user ansible from 23.96.113.95 port 60602 ssh2
Sep 12 05:58:54 v22019058497090703 sshd[5345]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=23.96.113.95
...
2019-09-12 12:09:19
165.227.69.39 attackspam
Sep 12 06:26:03 eventyay sshd[25926]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=165.227.69.39
Sep 12 06:26:04 eventyay sshd[25926]: Failed password for invalid user 1 from 165.227.69.39 port 49288 ssh2
Sep 12 06:31:38 eventyay sshd[26029]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=165.227.69.39
...
2019-09-12 12:34:11
106.12.93.138 attackbotsspam
Sep 12 03:51:24 game-panel sshd[11600]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.12.93.138
Sep 12 03:51:27 game-panel sshd[11600]: Failed password for invalid user 123456 from 106.12.93.138 port 43782 ssh2
Sep 12 03:58:42 game-panel sshd[11845]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.12.93.138
2019-09-12 12:22:20
106.12.133.247 attack
Sep 11 17:51:13 hiderm sshd\[14472\]: Invalid user songswell from 106.12.133.247
Sep 11 17:51:13 hiderm sshd\[14472\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.12.133.247
Sep 11 17:51:15 hiderm sshd\[14472\]: Failed password for invalid user songswell from 106.12.133.247 port 49258 ssh2
Sep 11 17:58:18 hiderm sshd\[15090\]: Invalid user mc3 from 106.12.133.247
Sep 11 17:58:18 hiderm sshd\[15090\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.12.133.247
2019-09-12 12:45:50
121.67.246.141 attack
Sep 12 06:24:59 MK-Soft-Root2 sshd\[8858\]: Invalid user vbox from 121.67.246.141 port 33550
Sep 12 06:24:59 MK-Soft-Root2 sshd\[8858\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=121.67.246.141
Sep 12 06:25:01 MK-Soft-Root2 sshd\[8858\]: Failed password for invalid user vbox from 121.67.246.141 port 33550 ssh2
...
2019-09-12 12:42:10
103.63.215.39 attackspambots
SMB Server BruteForce Attack
2019-09-12 12:04:53
217.182.95.16 attackbotsspam
2019-09-12T04:29:11.466756abusebot-8.cloudsearch.cf sshd\[3958\]: Invalid user arma3server from 217.182.95.16 port 47362
2019-09-12 12:40:53
185.14.192.25 attackbots
B: Magento admin pass test (wrong country)
2019-09-12 12:41:33
192.139.15.36 attackbots
Sep 12 06:54:47 www sshd\[30590\]: Invalid user 123456 from 192.139.15.36Sep 12 06:54:49 www sshd\[30590\]: Failed password for invalid user 123456 from 192.139.15.36 port 41953 ssh2Sep 12 07:03:10 www sshd\[30889\]: Invalid user csczserver from 192.139.15.36
...
2019-09-12 12:09:53

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