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: Iran (Islamic Republic of)

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:
b
Dig info:
; <<>> DiG 9.10.3-P4-Ubuntu <<>> 5.211.253.21
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 60056
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;5.211.253.21.			IN	A

;; AUTHORITY SECTION:
.			30	IN	SOA	a.root-servers.net. nstld.verisign-grs.com. 2025021201 1800 900 604800 86400

;; Query time: 16 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Thu Feb 13 04:20:40 CST 2025
;; MSG SIZE  rcvd: 105
Host info
Host 21.253.211.5.in-addr.arpa. not found: 3(NXDOMAIN)
Nslookup info:
Server:		183.60.83.19
Address:	183.60.83.19#53

** server can't find 21.253.211.5.in-addr.arpa: NXDOMAIN
Related IP info:
Related comments:
IP Type Details Datetime
138.68.3.141 attackbotsspam
$f2bV_matches
2019-07-20 01:19:50
222.186.15.110 attack
Jul 19 22:35:37 areeb-Workstation sshd\[2129\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=222.186.15.110  user=root
Jul 19 22:35:40 areeb-Workstation sshd\[2129\]: Failed password for root from 222.186.15.110 port 33886 ssh2
Jul 19 22:35:42 areeb-Workstation sshd\[2129\]: Failed password for root from 222.186.15.110 port 33886 ssh2
...
2019-07-20 01:12:52
194.9.178.159 attackbotsspam
Lines containing IP194.9.178.159:

194.9.178.159 - - [19/Jul/2019:17:06:34 +0000] "POST /pod/wp-comments-post.php HTTP/1.0" 200 31714 "-" "Mozilla/5.0 (Windows NT 6.1) AppleWebKhostname/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36 Kinza/4.8.2"

Username: Maureendug
Used Mailaddress: 
User IP:  194.9.178.159
Message:  Привет    hxxps://vk.com/1xbet_zerkalo_sayt  hxxps://vk.com/1xbet_ru_stavki_na_sport  hxxps://vk.com/zerkalo_1xbet_alternativniy2018  hxxps://vk.com/dostup_k_sahostnameu_1xbet             зеркало Париматч букмекерская контора Россия  Регистрация в 1xbet через 1xinfo com зеркало

........
-----------------------------------------------
https://www.blocklist.de/en/view.html?ip=194.9.178.159
2019-07-20 01:51:46
71.89.36.92 attack
Jul 19 18:47:41 rpi sshd[29359]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=71.89.36.92 
Jul 19 18:47:42 rpi sshd[29359]: Failed password for invalid user cisco from 71.89.36.92 port 48742 ssh2
2019-07-20 01:02:34
139.99.114.236 attackspam
WordPress login Brute force / Web App Attack on client site.
2019-07-20 01:01:16
185.137.111.23 attackspambots
smtp auth brute force
2019-07-20 01:18:44
91.206.15.239 attack
19.07.2019 16:46:34 Connection to port 3296 blocked by firewall
2019-07-20 01:40:41
23.89.29.66 attack
Registration form abuse
2019-07-20 01:26:03
94.23.254.125 attack
Jul 19 22:12:58 vibhu-HP-Z238-Microtower-Workstation sshd\[30252\]: Invalid user justin from 94.23.254.125
Jul 19 22:12:58 vibhu-HP-Z238-Microtower-Workstation sshd\[30252\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=94.23.254.125
Jul 19 22:13:00 vibhu-HP-Z238-Microtower-Workstation sshd\[30252\]: Failed password for invalid user justin from 94.23.254.125 port 50824 ssh2
Jul 19 22:17:37 vibhu-HP-Z238-Microtower-Workstation sshd\[30381\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=94.23.254.125  user=root
Jul 19 22:17:39 vibhu-HP-Z238-Microtower-Workstation sshd\[30381\]: Failed password for root from 94.23.254.125 port 50021 ssh2
...
2019-07-20 01:03:05
111.252.65.133 attackbotsspam
Jul 18 06:30:51 localhost kernel: [14690044.426042] iptables_INPUT_denied: IN=eth0 OUT= MAC=f2:3c:91:84:83:95:84:78:ac:57:aa:c1:08:00 SRC=111.252.65.133 DST=[mungedIP2] LEN=40 TOS=0x00 PREC=0x00 TTL=51 ID=15013 PROTO=TCP SPT=16248 DPT=37215 WINDOW=50879 RES=0x00 SYN URGP=0 
Jul 18 06:30:51 localhost kernel: [14690044.426067] iptables_INPUT_denied: IN=eth0 OUT= MAC=f2:3c:91:84:83:95:84:78:ac:57:aa:c1:08:00 SRC=111.252.65.133 DST=[mungedIP2] LEN=40 TOS=0x00 PREC=0x00 TTL=51 ID=15013 PROTO=TCP SPT=16248 DPT=37215 SEQ=758669438 ACK=0 WINDOW=50879 RES=0x00 SYN URGP=0 
Jul 19 12:46:37 localhost kernel: [14798990.662110] iptables_INPUT_denied: IN=eth0 OUT= MAC=f2:3c:91:84:83:95:84:78:ac:57:aa:c1:08:00 SRC=111.252.65.133 DST=[mungedIP2] LEN=40 TOS=0x00 PREC=0x00 TTL=52 ID=14629 PROTO=TCP SPT=16248 DPT=37215 WINDOW=50879 RES=0x00 SYN URGP=0 
Jul 19 12:46:37 localhost kernel: [14798990.662118] iptables_INPUT_denied: IN=eth0 OUT= MAC=f2:3c:91:84:83:95:84:78:ac:57:aa:c1:08:00 SRC=111.252.65.133 DST=[mungedIP2] LEN=40 TOS
2019-07-20 01:39:18
178.62.37.78 attack
Jul 19 18:58:36 vps647732 sshd[11778]: Failed password for root from 178.62.37.78 port 48246 ssh2
...
2019-07-20 01:08:37
193.201.224.82 attackbots
Automatic report - Banned IP Access
2019-07-20 01:25:33
101.96.113.50 attack
2019-07-19T18:40:36.495687lon01.zurich-datacenter.net sshd\[28814\]: Invalid user developer from 101.96.113.50 port 43946
2019-07-19T18:40:36.503184lon01.zurich-datacenter.net sshd\[28814\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=101.96.113.50
2019-07-19T18:40:38.319731lon01.zurich-datacenter.net sshd\[28814\]: Failed password for invalid user developer from 101.96.113.50 port 43946 ssh2
2019-07-19T18:46:19.612044lon01.zurich-datacenter.net sshd\[28919\]: Invalid user fcosta from 101.96.113.50 port 41508
2019-07-19T18:46:19.619303lon01.zurich-datacenter.net sshd\[28919\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=101.96.113.50
...
2019-07-20 01:47:20
185.176.26.101 attackspambots
Splunk® : port scan detected:
Jul 19 12:46:55 testbed kernel: Firewall: *TCP_IN Blocked* IN=eth0 OUT= MAC=82:c6:52:d1:6e:53:64:c3:d6:0b:ef:f0:08:00 SRC=185.176.26.101 DST=104.248.11.191 LEN=40 TOS=0x00 PREC=0x00 TTL=246 ID=45570 PROTO=TCP SPT=41515 DPT=6927 WINDOW=1024 RES=0x00 SYN URGP=0
2019-07-20 01:31:44
78.128.113.68 attackspam
Time:     Fri Jul 19 13:56:24 2019 -0300
IP:       78.128.113.68 (BG/Bulgaria/ip-113-68.4vendeta.com)
Failures: 30 (smtpauth)
Interval: 3600 seconds
Blocked:  Permanent Block
2019-07-20 01:09:11

Recently Reported IPs

50.189.89.46 159.252.117.192 41.43.25.248 230.163.219.28
123.34.191.162 51.2.38.96 221.202.69.36 61.115.44.195
68.70.205.2 168.212.141.57 98.155.155.188 211.16.126.185
247.207.132.36 145.227.221.140 32.172.71.161 229.72.99.126
64.190.139.60 74.158.180.12 228.126.157.146 70.135.104.15