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 <<>> 104.21.20.100
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 63783
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;104.21.20.100.			IN	A

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

;; Query time: 129 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Fri Feb 18 02:15:05 CST 2022
;; MSG SIZE  rcvd: 106
Host info
Host 100.20.21.104.in-addr.arpa. not found: 3(NXDOMAIN)
Nslookup info:
Server:		183.60.83.19
Address:	183.60.83.19#53

** server can't find 100.20.21.104.in-addr.arpa: NXDOMAIN
Related IP info:
Related comments:
IP Type Details Datetime
134.175.42.162 attack
$f2bV_matches
2019-06-29 19:25:56
168.195.206.230 attackbots
Jun 29 05:40:41 master sshd[23255]: Failed password for invalid user admin from 168.195.206.230 port 58482 ssh2
2019-06-29 19:12:24
193.169.252.143 attack
Jun 29 11:10:34 mail postfix/smtpd\[9510\]: warning: unknown\[193.169.252.143\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\
Jun 29 11:26:07 mail postfix/smtpd\[9592\]: warning: unknown\[193.169.252.143\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\
Jun 29 11:41:48 mail postfix/smtpd\[10335\]: warning: unknown\[193.169.252.143\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\
Jun 29 12:13:26 mail postfix/smtpd\[11071\]: warning: unknown\[193.169.252.143\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\
2019-06-29 19:28:05
218.90.171.245 attackspam
port scan and connect, tcp 1433 (ms-sql-s)
2019-06-29 19:07:49
45.122.221.239 attackbots
Sql/code injection probe
2019-06-29 19:17:24
123.25.115.4 attack
timhelmke.de 123.25.115.4 \[29/Jun/2019:10:37:07 +0200\] "POST /xmlrpc.php HTTP/1.1" 200 4067 "-" "Mozilla/5.0 \(Windows NT 6.1\; Win64\; x64\) AppleWebKit/537.36 \(KHTML, like Gecko\) Chrome/59.0.3071.109 Safari/537.36"
timhelmke.de 123.25.115.4 \[29/Jun/2019:10:37:12 +0200\] "POST /xmlrpc.php HTTP/1.1" 200 4067 "-" "Mozilla/5.0 \(Windows NT 6.1\; Win64\; x64\) AppleWebKit/537.36 \(KHTML, like Gecko\) Chrome/59.0.3071.109 Safari/537.36"
2019-06-29 19:36:44
167.99.212.63 attackbots
Sql/code injection probe
2019-06-29 19:13:33
51.255.46.83 attackbots
Jun 29 08:35:32 ip-172-31-1-72 sshd\[25736\]: Invalid user jenkins from 51.255.46.83
Jun 29 08:35:32 ip-172-31-1-72 sshd\[25736\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.255.46.83
Jun 29 08:35:34 ip-172-31-1-72 sshd\[25736\]: Failed password for invalid user jenkins from 51.255.46.83 port 55235 ssh2
Jun 29 08:38:29 ip-172-31-1-72 sshd\[25776\]: Invalid user sconsole from 51.255.46.83
Jun 29 08:38:29 ip-172-31-1-72 sshd\[25776\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.255.46.83
2019-06-29 19:10:29
139.99.221.61 attackspambots
Jun 29 10:38:33 bouncer sshd\[4710\]: Invalid user groupoffice from 139.99.221.61 port 48923
Jun 29 10:38:33 bouncer sshd\[4710\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=139.99.221.61 
Jun 29 10:38:35 bouncer sshd\[4710\]: Failed password for invalid user groupoffice from 139.99.221.61 port 48923 ssh2
...
2019-06-29 19:09:21
109.172.52.13 attackspambots
" "
2019-06-29 19:13:00
157.230.110.11 attackspambots
Jun 29 13:16:51 vps65 sshd\[5828\]: Invalid user jboss from 157.230.110.11 port 57072
Jun 29 13:16:51 vps65 sshd\[5828\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=157.230.110.11
...
2019-06-29 19:40:27
198.211.122.197 attackbots
Jun 29 13:07:45 lnxmysql61 sshd[4601]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=198.211.122.197
Jun 29 13:07:46 lnxmysql61 sshd[4601]: Failed password for invalid user ubuntu from 198.211.122.197 port 49484 ssh2
Jun 29 13:12:20 lnxmysql61 sshd[5311]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=198.211.122.197
2019-06-29 19:17:41
185.53.88.45 attack
\[2019-06-29 07:05:37\] SECURITY\[5156\] res_security_log.c: SecurityEvent="FailedACL",EventTV="2019-06-29T07:05:37.342-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="011441217900519",SessionID="0x7f13a84dcfa8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/185.53.88.45/58894",ACLName="no_extension_match"
\[2019-06-29 07:06:59\] SECURITY\[5156\] res_security_log.c: SecurityEvent="FailedACL",EventTV="2019-06-29T07:06:59.963-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="9011441217900519",SessionID="0x7f13a8255c88",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/185.53.88.45/53132",ACLName="no_extension_match"
\[2019-06-29 07:08:29\] SECURITY\[5156\] res_security_log.c: SecurityEvent="FailedACL",EventTV="2019-06-29T07:08:29.376-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="011441217900519",SessionID="0x7f13a84dcfa8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/185.53.88.45/52348",ACLName="no_exten
2019-06-29 19:27:40
177.221.98.203 attackspam
Jun 29 04:37:48 web1 postfix/smtpd[4286]: warning: unknown[177.221.98.203]: SASL PLAIN authentication failed: authentication failure
...
2019-06-29 19:21:56
46.166.151.47 attackspam
\[2019-06-29 07:09:08\] SECURITY\[5156\] res_security_log.c: SecurityEvent="FailedACL",EventTV="2019-06-29T07:09:08.115-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="981046363302946",SessionID="0x7f13a84dcfa8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/46.166.151.47/51390",ACLName="no_extension_match"
\[2019-06-29 07:11:44\] SECURITY\[5156\] res_security_log.c: SecurityEvent="FailedACL",EventTV="2019-06-29T07:11:44.311-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="0046363302946",SessionID="0x7f13a8d3cb78",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/46.166.151.47/56390",ACLName="no_extension_match"
\[2019-06-29 07:13:58\] SECURITY\[5156\] res_security_log.c: SecurityEvent="FailedACL",EventTV="2019-06-29T07:13:58.289-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="00046363302946",SessionID="0x7f13a8d3cb78",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/46.166.151.47/60202",ACLName="no_extens
2019-06-29 19:33:57

Recently Reported IPs

104.21.2.93 104.21.68.133 104.21.20.110 104.21.20.11
104.21.20.113 104.21.20.12 104.21.20.116 104.21.20.127
104.21.20.121 104.21.20.123 104.21.20.133 104.21.20.130
104.21.20.129 104.21.68.139 104.21.20.144 104.21.20.145
104.21.20.149 104.21.20.139 104.21.20.138 104.21.20.135