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 <<>> 104.21.81.73
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 16227
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;104.21.81.73.			IN	A

;; AUTHORITY SECTION:
.			560	IN	SOA	a.root-servers.net. nstld.verisign-grs.com. 2022021701 1800 900 604800 86400

;; Query time: 62 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Fri Feb 18 03:03:05 CST 2022
;; MSG SIZE  rcvd: 105
Host info
Host 73.81.21.104.in-addr.arpa. not found: 3(NXDOMAIN)
Nslookup info:
Server:		183.60.83.19
Address:	183.60.83.19#53

** server can't find 73.81.21.104.in-addr.arpa: NXDOMAIN
Related IP info:
Related comments:
IP Type Details Datetime
91.134.167.236 attackbots
SSH Brute Force
2020-08-18 23:12:19
45.148.108.217 attackspambots
Unauthorized connection attempt from IP address 45.148.108.217 on Port 445(SMB)
2020-08-18 23:45:05
49.234.16.16 attackbotsspam
2020-08-18T14:26:37.268006mail.broermann.family sshd[23043]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=49.234.16.16
2020-08-18T14:26:37.263783mail.broermann.family sshd[23043]: Invalid user www from 49.234.16.16 port 36754
2020-08-18T14:26:39.254274mail.broermann.family sshd[23043]: Failed password for invalid user www from 49.234.16.16 port 36754 ssh2
2020-08-18T14:33:29.922712mail.broermann.family sshd[23304]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=49.234.16.16  user=root
2020-08-18T14:33:31.467470mail.broermann.family sshd[23304]: Failed password for root from 49.234.16.16 port 47170 ssh2
...
2020-08-18 23:02:19
192.35.168.218 attackspam
RDP brute force attack detected by fail2ban
2020-08-18 23:50:52
84.210.146.41 attack
SSH login attempts.
2020-08-18 23:00:51
36.74.46.104 attackspam
Unauthorized connection attempt from IP address 36.74.46.104 on Port 445(SMB)
2020-08-18 23:35:58
196.202.62.70 attackbots
Unauthorized connection attempt from IP address 196.202.62.70 on Port 445(SMB)
2020-08-18 23:27:04
193.242.150.144 attack
Unauthorized connection attempt from IP address 193.242.150.144 on Port 445(SMB)
2020-08-18 23:54:08
85.95.178.149 attackspam
Aug 18 12:33:03 scw-6657dc sshd[11784]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=85.95.178.149
Aug 18 12:33:03 scw-6657dc sshd[11784]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=85.95.178.149
Aug 18 12:33:05 scw-6657dc sshd[11784]: Failed password for invalid user colin from 85.95.178.149 port 7935 ssh2
...
2020-08-18 23:30:58
84.214.36.120 attackbotsspam
SSH login attempts.
2020-08-18 23:29:38
159.65.78.3 attackspambots
Aug 18 14:55:23 inter-technics sshd[30054]: Invalid user zlw from 159.65.78.3 port 42420
Aug 18 14:55:23 inter-technics sshd[30054]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=159.65.78.3
Aug 18 14:55:23 inter-technics sshd[30054]: Invalid user zlw from 159.65.78.3 port 42420
Aug 18 14:55:25 inter-technics sshd[30054]: Failed password for invalid user zlw from 159.65.78.3 port 42420 ssh2
Aug 18 15:01:06 inter-technics sshd[30469]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=159.65.78.3  user=root
Aug 18 15:01:08 inter-technics sshd[30469]: Failed password for root from 159.65.78.3 port 52968 ssh2
...
2020-08-18 22:59:54
216.243.58.144 attack
Aug 18 14:32:55 * sshd[27816]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=216.243.58.144
2020-08-18 23:37:58
61.135.223.109 attackspambots
2020-08-18T16:41:15.235471vps751288.ovh.net sshd\[18704\]: Invalid user chaowei from 61.135.223.109 port 23827
2020-08-18T16:41:15.241967vps751288.ovh.net sshd\[18704\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=61.135.223.109
2020-08-18T16:41:17.864214vps751288.ovh.net sshd\[18704\]: Failed password for invalid user chaowei from 61.135.223.109 port 23827 ssh2
2020-08-18T16:46:01.765496vps751288.ovh.net sshd\[18744\]: Invalid user syftp from 61.135.223.109 port 63116
2020-08-18T16:46:01.772960vps751288.ovh.net sshd\[18744\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=61.135.223.109
2020-08-18 23:09:35
101.51.151.75 attack
Port probing on unauthorized port 23
2020-08-18 23:00:14
196.202.139.6 attack
Unauthorized connection attempt from IP address 196.202.139.6 on Port 445(SMB)
2020-08-18 23:39:42

Recently Reported IPs

104.21.81.68 104.21.81.85 104.21.81.87 104.21.81.86
104.21.81.91 104.21.81.89 104.21.81.88 104.21.81.92
104.21.81.94 104.21.81.93 104.21.81.96 104.21.81.98
104.21.82.100 104.21.82.10 104.21.81.99 104.21.82.102
104.21.82.101 104.21.82.103 104.21.82.105 104.21.82.107