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: Ukraine

Internet Service Provider: Tenet Scientific Production Enterprise LLC

Hostname: unknown

Organization: unknown

Usage Type: Fixed Line ISP

Comments:
Type Details Datetime
attackbots
email spam
2019-12-17 19:52:22
attack
195.138.91.66 has been banned for [spam]
...
2019-12-07 14:59:10
attackspam
Oct  1 04:10:33 tux postfix/smtpd[13197]: connect from unknown[195.138.91.66]
Oct x@x
Oct  1 04:10:37 tux postfix/smtpd[13197]: lost connection after RCPT from unknown[195.138.91.66]
Oct  1 04:10:37 tux postfix/smtpd[13197]: disconnect from unknown[195.138.91.66]


........
-----------------------------------------------
https://www.blocklist.de/en/view.html?ip=195.138.91.66
2019-10-04 06:46:28
Comments on same subnet:
No discussion about this subnet yet..
Whois info:
b
Dig info:
; <<>> DiG 9.10.3-P4-Ubuntu <<>> 195.138.91.66
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 6236
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1

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

;; AUTHORITY SECTION:
.			560	IN	SOA	a.root-servers.net. nstld.verisign-grs.com. 2019100301 1800 900 604800 86400

;; Query time: 448 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Fri Oct 04 06:46:24 CST 2019
;; MSG SIZE  rcvd: 117
Host info
Host 66.91.138.195.in-addr.arpa. not found: 3(NXDOMAIN)
Nslookup info:
Server:		183.60.83.19
Address:	183.60.83.19#53

** server can't find 66.91.138.195.in-addr.arpa: NXDOMAIN
Related IP info:
Related comments:
IP Type Details Datetime
194.61.24.177 attackspambots
...
2020-05-26 22:26:11
159.89.157.75 attack
2020-05-26T13:43:56.161531shield sshd\[16716\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=159.89.157.75  user=root
2020-05-26T13:43:58.258578shield sshd\[16716\]: Failed password for root from 159.89.157.75 port 33000 ssh2
2020-05-26T13:47:55.495392shield sshd\[17466\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=159.89.157.75  user=root
2020-05-26T13:47:57.070890shield sshd\[17466\]: Failed password for root from 159.89.157.75 port 37384 ssh2
2020-05-26T13:51:53.672073shield sshd\[18529\]: Invalid user oliver from 159.89.157.75 port 41764
2020-05-26 22:22:12
139.219.11.254 attackbotsspam
$f2bV_matches
2020-05-26 22:42:09
112.126.102.187 attackbotsspam
$f2bV_matches
2020-05-26 22:33:53
104.248.43.155 attackbots
Port scan: Attack repeated for 24 hours
2020-05-26 22:07:38
106.13.5.134 attackspam
May 26 09:28:22 mail sshd\[23609\]: Invalid user admin from 106.13.5.134
May 26 09:28:22 mail sshd\[23609\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.13.5.134
May 26 09:28:24 mail sshd\[23609\]: Failed password for invalid user admin from 106.13.5.134 port 45264 ssh2
...
2020-05-26 22:29:50
122.51.186.145 attackbotsspam
May 26 23:35:04 localhost sshd[2859345]: Invalid user yousuf from 122.51.186.145 port 55756
...
2020-05-26 22:35:16
185.53.88.36 attackspam
05/26/2020-10:29:25.133047 185.53.88.36 Protocol: 17 ET SCAN Sipvicious Scan
2020-05-26 22:39:45
102.130.49.150 attackbotsspam
ICMP MH Probe, Scan /Distributed -
2020-05-26 22:47:45
125.234.1.154 attack
VN_MAINT-VN-VIETEL_<177>1590491589 [1:2010935:3] ET SCAN Suspicious inbound to MSSQL port 1433 [Classification: Potentially Bad Traffic] [Priority: 2]:  {TCP} 125.234.1.154:41770
2020-05-26 22:34:45
114.199.116.195 attackbots
Postfix RBL failed
2020-05-26 22:47:14
116.114.95.166 attackspam
[MK-VM4] Blocked by UFW
2020-05-26 22:09:11
159.65.132.170 attack
May 26 06:55:49 dignus sshd[4074]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=159.65.132.170  user=root
May 26 06:55:51 dignus sshd[4074]: Failed password for root from 159.65.132.170 port 37800 ssh2
May 26 06:59:50 dignus sshd[4317]: Invalid user console from 159.65.132.170 port 41886
May 26 06:59:50 dignus sshd[4317]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=159.65.132.170
May 26 06:59:51 dignus sshd[4317]: Failed password for invalid user console from 159.65.132.170 port 41886 ssh2
...
2020-05-26 22:23:42
183.88.234.210 attackbotsspam
(imapd) Failed IMAP login from 183.88.234.210 (TH/Thailand/mx-ll-183.88.234-210.dynamic.3bb.in.th): 1 in the last 3600 secs; Ports: *; Direction: inout; Trigger: LF_TRIGGER; Logs: May 26 11:58:26 ir1 dovecot[2885757]: imap-login: Disconnected (auth failed, 1 attempts in 6 secs): user=, method=PLAIN, rip=183.88.234.210, lip=5.63.12.44, TLS, session=
2020-05-26 22:20:26
195.54.160.12 attackspam
scans 2 times in preceeding hours on the ports (in chronological order) 9749 31153
2020-05-26 22:28:07

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