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: Korea (Republic of)

Internet Service Provider: KT Corporation

Hostname: unknown

Organization: unknown

Usage Type: unknown

Comments:
Type Details Datetime
attackspam
1581946742 - 02/17/2020 20:39:02 Host: 121.141.136.86/121.141.136.86 Port: 23 TCP Blocked
...
2020-02-17 22:37:27
Comments on same subnet:
No discussion about this subnet yet..
Whois info:
b
Dig info:
; <<>> DiG 9.10.3-P4-Ubuntu <<>> 121.141.136.86
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 11965
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;121.141.136.86.			IN	A

;; AUTHORITY SECTION:
.			572	IN	SOA	a.root-servers.net. nstld.verisign-grs.com. 2020021700 1800 900 604800 86400

;; Query time: 332 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Mon Feb 17 22:37:22 CST 2020
;; MSG SIZE  rcvd: 118
Host info
Host 86.136.141.121.in-addr.arpa. not found: 3(NXDOMAIN)
Nslookup info:
Server:		183.60.83.19
Address:	183.60.83.19#53

** server can't find 86.136.141.121.in-addr.arpa: NXDOMAIN
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