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: Tainan

Region: Tainan

Country: Taiwan, China

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 <<>> 140.116.21.21
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 35771
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;140.116.21.21.			IN	A

;; AUTHORITY SECTION:
.			163	IN	SOA	a.root-servers.net. nstld.verisign-grs.com. 2023050601 1800 900 604800 86400

;; Query time: 137 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Sun May 07 09:10:09 CST 2023
;; MSG SIZE  rcvd: 106
Host info
Host 21.21.116.140.in-addr.arpa. not found: 3(NXDOMAIN)
Nslookup info:
Server:		183.60.83.19
Address:	183.60.83.19#53

** server can't find 21.21.116.140.in-addr.arpa: NXDOMAIN
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2019-12-17T05:39:52.667865ns547587 sshd\[13305\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=134.175.39.108
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