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: Germany

Internet Service Provider: Vodafone Kabel Deutschland GmbH

Hostname: unknown

Organization: unknown

Usage Type: Fixed Line ISP

Comments:
Type Details Datetime
attack
Jul  7 21:07:27 mailserver sshd[27148]: Invalid user magda from 31.16.147.48
Jul  7 21:07:27 mailserver sshd[27148]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=31.16.147.48
Jul  7 21:07:30 mailserver sshd[27148]: Failed password for invalid user magda from 31.16.147.48 port 37166 ssh2
Jul  7 21:07:30 mailserver sshd[27148]: Received disconnect from 31.16.147.48 port 37166:11: Normal Shutdown, Thank you for playing [preauth]
Jul  7 21:07:30 mailserver sshd[27148]: Disconnected from 31.16.147.48 port 37166 [preauth]
Jul  7 22:16:52 mailserver sshd[30732]: Invalid user mella from 31.16.147.48
Jul  7 22:16:52 mailserver sshd[30732]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=31.16.147.48
Jul  7 22:16:54 mailserver sshd[30732]: Failed password for invalid user mella from 31.16.147.48 port 36512 ssh2
Jul  7 22:16:54 mailserver sshd[30732]: Received disconnect from 31.16.147.48 port 36512........
-------------------------------
2019-07-10 11:15:59
attackspam
Jul  7 00:41:05 MK-Soft-VM4 sshd\[22609\]: Invalid user stormy from 31.16.147.48 port 56669
Jul  7 00:41:05 MK-Soft-VM4 sshd\[22609\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=31.16.147.48
Jul  7 00:41:07 MK-Soft-VM4 sshd\[22609\]: Failed password for invalid user stormy from 31.16.147.48 port 56669 ssh2
...
2019-07-07 10:38:47
attack
Jul  3 06:53:38 srv-4 sshd\[18428\]: Invalid user test from 31.16.147.48
Jul  3 06:53:38 srv-4 sshd\[18428\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=31.16.147.48
Jul  3 06:53:40 srv-4 sshd\[18428\]: Failed password for invalid user test from 31.16.147.48 port 56745 ssh2
...
2019-07-03 13:55:56
attackspambots
Jul  2 07:41:05 web2 sshd[10452]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=31.16.147.48
Jul  2 07:41:07 web2 sshd[10452]: Failed password for invalid user east from 31.16.147.48 port 58300 ssh2
2019-07-02 16:18:56
attackspam
Lines containing failures of 31.16.147.48 (max 1000)
Jun 27 03:42:09 Server sshd[12290]: User r.r from 31.16.147.48 not allowed because not listed in AllowUsers
Jun 27 03:42:09 Server sshd[12290]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=31.16.147.48  user=r.r
Jun 27 03:42:10 Server sshd[12290]: Failed password for invalid user r.r from 31.16.147.48 port 54123 ssh2


........
-----------------------------------------------
https://www.blocklist.de/en/view.html?ip=31.16.147.48
2019-06-30 12:27:12
Comments on same subnet:
No discussion about this subnet yet..
Whois info:
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Dig info:
; <<>> DiG 9.10.3-P4-Ubuntu <<>> 31.16.147.48
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 25884
;; flags: qr rd ra ad; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1

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

;; AUTHORITY SECTION:
.			3600	IN	SOA	a.root-servers.net. nstld.verisign-grs.com. 2019062901 1800 900 604800 86400

;; Query time: 3 msec
;; SERVER: 67.207.67.2#53(67.207.67.2)
;; WHEN: Sun Jun 30 12:27:06 CST 2019
;; MSG SIZE  rcvd: 116
Host info
48.147.16.31.in-addr.arpa domain name pointer ip1f109330.dynamic.kabel-deutschland.de.
Nslookup info:
Server:		67.207.67.2
Address:	67.207.67.2#53

Non-authoritative answer:
48.147.16.31.in-addr.arpa	name = ip1f109330.dynamic.kabel-deutschland.de.

Authoritative answers can be found from:
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159.89.86.92 - - \[17/Jan/2020:11:39:31 +0100\] "POST /wp-login.php HTTP/1.0" 200 6640 "-" "Mozilla/5.0 \(X11\; Ubuntu\; Linux x86_64\; rv:62.0\) Gecko/20100101 Firefox/62.0"
159.89.86.92 - - \[17/Jan/2020:11:39:39 +0100\] "POST /wp-login.php HTTP/1.0" 200 6453 "-" "Mozilla/5.0 \(X11\; Ubuntu\; Linux x86_64\; rv:62.0\) Gecko/20100101 Firefox/62.0"
159.89.86.92 - - \[17/Jan/2020:11:39:41 +0100\] "POST /wp-login.php HTTP/1.0" 200 6453 "-" "Mozilla/5.0 \(X11\; Ubuntu\; Linux x86_64\; rv:62.0\) Gecko/20100101 Firefox/62.0"
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148.101.110.197 attack
unauthorized connection attempt
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