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: Singapore

Internet Service Provider: MyRepublic Ltd.

Hostname: unknown

Organization: unknown

Usage Type: Fixed Line ISP

Comments:
Type Details Datetime
attack
2019-07-08T05:01:07.567886ns1.unifynetsol.net postfix/smtpd\[23619\]: warning: unknown\[66.96.205.52\]: SASL LOGIN authentication failed: authentication failure
2019-07-08T05:01:09.953499ns1.unifynetsol.net postfix/smtpd\[28173\]: warning: unknown\[66.96.205.52\]: SASL LOGIN authentication failed: authentication failure
2019-07-08T05:01:12.090083ns1.unifynetsol.net postfix/smtpd\[29705\]: warning: unknown\[66.96.205.52\]: SASL LOGIN authentication failed: authentication failure
2019-07-08T05:01:14.501231ns1.unifynetsol.net postfix/smtpd\[23619\]: warning: unknown\[66.96.205.52\]: SASL LOGIN authentication failed: authentication failure
2019-07-08T05:01:16.176651ns1.unifynetsol.net postfix/smtpd\[29705\]: warning: unknown\[66.96.205.52\]: SASL LOGIN authentication failed: authentication failure
2019-07-08 12:43:06
attackspambots
Jul  4 22:59:46 vps65 postfix/smtpd\[6435\]: warning: unknown\[66.96.205.52\]: SASL LOGIN authentication failed: authentication failure
Jul  4 22:59:49 vps65 postfix/smtpd\[21273\]: warning: unknown\[66.96.205.52\]: SASL LOGIN authentication failed: authentication failure
Jul  4 22:59:52 vps65 postfix/smtpd\[6435\]: warning: unknown\[66.96.205.52\]: SASL LOGIN authentication failed: authentication failure
...
2019-07-05 05:38:34
attackspambots
Jul  4 10:06:27 heicom postfix/smtpd\[5384\]: warning: unknown\[66.96.205.52\]: SASL LOGIN authentication failed: authentication failure
Jul  4 10:06:28 heicom postfix/smtpd\[5384\]: warning: unknown\[66.96.205.52\]: SASL LOGIN authentication failed: authentication failure
Jul  4 10:06:29 heicom postfix/smtpd\[5384\]: warning: unknown\[66.96.205.52\]: SASL LOGIN authentication failed: authentication failure
Jul  4 10:06:30 heicom postfix/smtpd\[5384\]: warning: unknown\[66.96.205.52\]: SASL LOGIN authentication failed: authentication failure
Jul  4 10:06:31 heicom postfix/smtpd\[5384\]: warning: unknown\[66.96.205.52\]: SASL LOGIN authentication failed: authentication failure
...
2019-07-04 20:38:27
attackbots
Jun 28 18:56:23 host postfix/smtpd\[29815\]: warning: unknown\[66.96.205.52\]: SASL LOGIN authentication failed: authentication failure
Jun 28 18:56:24 host postfix/smtpd\[29815\]: warning: unknown\[66.96.205.52\]: SASL LOGIN authentication failed: authentication failure
...
2019-06-29 05:18:29
attackbots
Jun 27 05:54:12 host postfix/smtpd\[28250\]: warning: unknown\[66.96.205.52\]: SASL LOGIN authentication failed: authentication failure
Jun 27 05:54:13 host postfix/smtpd\[28250\]: warning: unknown\[66.96.205.52\]: SASL LOGIN authentication failed: authentication failure
...
2019-06-27 12:06:01
attack
Jun 25 19:25:02 mail postfix/smtpd[12452]: warning: unknown[66.96.205.52]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jun 25 19:25:09 mail postfix/smtpd[12458]: warning: unknown[66.96.205.52]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jun 25 19:25:20 mail postfix/smtpd[12452]: warning: unknown[66.96.205.52]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
...
2019-06-26 01:49:21
Comments on same subnet:
No discussion about this subnet yet..
Whois info:
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Dig info:

; <<>> DiG 9.10.3-P4-Ubuntu <<>> 66.96.205.52
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 42490
;; flags: qr rd ra ad; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1

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

;; AUTHORITY SECTION:
.			3600	IN	SOA	a.root-servers.net. nstld.verisign-grs.com. 2019060501 1800 900 604800 86400

;; Query time: 2 msec
;; SERVER: 67.207.67.2#53(67.207.67.2)
;; WHEN: Thu Jun 06 11:01:45 CST 2019
;; MSG SIZE  rcvd: 116

Host info
52.205.96.66.in-addr.arpa domain name pointer 52-205-96-66.myrepublic.com.sg.
Nslookup info:
Server:		67.207.67.2
Address:	67.207.67.2#53

Non-authoritative answer:
52.205.96.66.in-addr.arpa	name = 52-205-96-66.myrepublic.com.sg.

Authoritative answers can be found from:

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