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 <<>> 104.21.8.52
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 61973
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;104.21.8.52.			IN	A

;; AUTHORITY SECTION:
.			268	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 03:00:25 CST 2022
;; MSG SIZE  rcvd: 104
Host info
Host 52.8.21.104.in-addr.arpa. not found: 3(NXDOMAIN)
Nslookup info:
Server:		183.60.83.19
Address:	183.60.83.19#53

** server can't find 52.8.21.104.in-addr.arpa: NXDOMAIN
Related IP info:
Related comments:
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Jan 28 16:15:11 MK-Soft-VM6 sshd[28359]: Failed password for invalid user shproject from 139.59.0.243 port 59530 ssh2
...
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Unauthorized connection attempt detected from IP address 174.45.161.183 to port 81 [J]
2020-01-28 22:47:21

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