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: France

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 <<>> 81.255.21.57
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 46934
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;81.255.21.57.			IN	A

;; AUTHORITY SECTION:
.			30	IN	SOA	a.root-servers.net. nstld.verisign-grs.com. 2025022500 1800 900 604800 86400

;; Query time: 34 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Tue Feb 25 14:02:37 CST 2025
;; MSG SIZE  rcvd: 105
Host info
Host 57.21.255.81.in-addr.arpa. not found: 3(NXDOMAIN)
Nslookup info:
Server:		183.60.83.19
Address:	183.60.83.19#53

** server can't find 57.21.255.81.in-addr.arpa: NXDOMAIN
Related IP info:
Related comments:
IP Type Details Datetime
208.100.26.241 attackspam
firewall-block, port(s): 1433/tcp
2019-11-03 15:27:45
124.207.122.42 attackspam
Unauthorised access (Nov  3) SRC=124.207.122.42 LEN=44 TTL=233 ID=49319 TCP DPT=1433 WINDOW=1024 SYN
2019-11-03 15:33:59
49.88.112.112 attack
Nov  3 05:52:41 ip-172-31-1-72 sshd\[18884\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=49.88.112.112  user=root
Nov  3 05:52:43 ip-172-31-1-72 sshd\[18884\]: Failed password for root from 49.88.112.112 port 15296 ssh2
Nov  3 05:53:34 ip-172-31-1-72 sshd\[19139\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=49.88.112.112  user=root
Nov  3 05:53:36 ip-172-31-1-72 sshd\[19139\]: Failed password for root from 49.88.112.112 port 51011 ssh2
Nov  3 05:53:59 ip-172-31-1-72 sshd\[19285\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=49.88.112.112  user=root
2019-11-03 15:31:04
159.203.201.168 attackspambots
8047/tcp 8834/tcp 138/tcp...
[2019-09-12/11-02]45pkt,41pt.(tcp),2pt.(udp)
2019-11-03 15:18:00
92.53.65.164 attackspam
3336/tcp 3337/tcp 3339/tcp...
[2019-09-25/11-03]319pkt,240pt.(tcp)
2019-11-03 15:38:03
190.92.2.167 attackbots
Connection by 190.92.2.167 on port: 81 got caught by honeypot at 11/3/2019 4:53:58 AM
2019-11-03 15:35:12
218.241.172.122 attackbotsspam
Nov  3 06:44:00 minden010 sshd[12787]: Failed password for root from 218.241.172.122 port 45070 ssh2
Nov  3 06:53:33 minden010 sshd[17078]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=218.241.172.122
Nov  3 06:53:36 minden010 sshd[17078]: Failed password for invalid user juliejung from 218.241.172.122 port 60432 ssh2
...
2019-11-03 15:34:33
159.203.197.18 attack
1364/tcp 2323/tcp 8047/tcp...
[2019-09-16/11-02]49pkt,44pt.(tcp),2pt.(udp)
2019-11-03 15:28:05
173.239.37.139 attackbots
Nov  3 08:46:10 server sshd\[28464\]: Invalid user nr from 173.239.37.139
Nov  3 08:46:10 server sshd\[28464\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=173.239.37.139 
Nov  3 08:46:12 server sshd\[28464\]: Failed password for invalid user nr from 173.239.37.139 port 32976 ssh2
Nov  3 08:54:10 server sshd\[30441\]: Invalid user tcloud from 173.239.37.139
Nov  3 08:54:10 server sshd\[30441\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=173.239.37.139 
...
2019-11-03 15:23:09
190.181.190.30 attack
Unauthorized IMAP connection attempt
2019-11-03 15:23:44
185.176.27.254 attack
11/03/2019-02:18:55.828300 185.176.27.254 Protocol: 6 ET SCAN NMAP -sS window 1024
2019-11-03 15:19:48
183.133.100.89 attack
Nov  3 06:39:32 mxgate1 postfix/postscreen[3401]: CONNECT from [183.133.100.89]:55352 to [176.31.12.44]:25
Nov  3 06:39:32 mxgate1 postfix/dnsblog[3402]: addr 183.133.100.89 listed by domain zen.spamhaus.org as 127.0.0.4
Nov  3 06:39:32 mxgate1 postfix/dnsblog[3402]: addr 183.133.100.89 listed by domain zen.spamhaus.org as 127.0.0.11
Nov  3 06:39:32 mxgate1 postfix/dnsblog[3402]: addr 183.133.100.89 listed by domain zen.spamhaus.org as 127.0.0.3
Nov  3 06:39:32 mxgate1 postfix/dnsblog[3405]: addr 183.133.100.89 listed by domain cbl.abuseat.org as 127.0.0.2
Nov  3 06:39:33 mxgate1 postfix/dnsblog[3404]: addr 183.133.100.89 listed by domain ix.dnsbl.xxxxxx.net as 127.0.0.2
Nov  3 06:39:33 mxgate1 postfix/postscreen[3401]: PREGREET 18 after 0.63 from [183.133.100.89]:55352: EHLO 150mail.com

Nov  3 06:39:33 mxgate1 postfix/postscreen[3401]: DNSBL rank 4 for [183.133.100.89]:55352
Nov x@x
Nov  3 06:39:36 mxgate1 postfix/postscreen[3401]: HANGUP after 2.6 from [183.133.100.8........
-------------------------------
2019-11-03 15:36:15
218.69.91.84 attackbots
Repeated brute force against a port
2019-11-03 15:42:01
82.187.186.115 attackbots
Nov  3 06:54:26 dedicated sshd[7941]: Invalid user cvs from 82.187.186.115 port 52396
2019-11-03 15:10:41
157.52.193.108 attackbots
Nov  3 06:27:50 mxgate1 postfix/postscreen[2814]: CONNECT from [157.52.193.108]:44184 to [176.31.12.44]:25
Nov  3 06:27:50 mxgate1 postfix/dnsblog[2816]: addr 157.52.193.108 listed by domain zen.spamhaus.org as 127.0.0.3
Nov  3 06:27:50 mxgate1 postfix/dnsblog[2817]: addr 157.52.193.108 listed by domain b.barracudacentral.org as 127.0.0.2
Nov  3 06:27:56 mxgate1 postfix/postscreen[2814]: DNSBL rank 3 for [157.52.193.108]:44184
Nov x@x
Nov  3 06:27:57 mxgate1 postfix/postscreen[2814]: DISCONNECT [157.52.193.108]:44184


........
-----------------------------------------------
https://www.blocklist.de/en/view.html?ip=157.52.193.108
2019-11-03 15:05:28

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