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: United States of America (the)

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 <<>> 16.21.123.138
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 37123
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;16.21.123.138.			IN	A

;; AUTHORITY SECTION:
.			30	IN	SOA	a.root-servers.net. nstld.verisign-grs.com. 2025021800 1800 900 604800 86400

;; Query time: 15 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Wed Feb 19 00:15:11 CST 2025
;; MSG SIZE  rcvd: 106
Host info
Host 138.123.21.16.in-addr.arpa. not found: 3(NXDOMAIN)
Nslookup info:
Server:		183.60.83.19
Address:	183.60.83.19#53

** server can't find 138.123.21.16.in-addr.arpa: NXDOMAIN
Related IP info:
Related comments:
IP Type Details Datetime
35.173.50.147 attackbots
Jul 28 21:23:30   TCP Attack: SRC=35.173.50.147 DST=[Masked] LEN=250 TOS=0x00 PREC=0x00 TTL=236  DF PROTO=TCP SPT=45204 DPT=80 WINDOW=913 RES=0x00 ACK PSH URGP=0
2019-07-29 11:19:56
69.162.114.102 attack
Jul 28 18:08:52 TORMINT sshd\[19148\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=69.162.114.102  user=root
Jul 28 18:08:54 TORMINT sshd\[19148\]: Failed password for root from 69.162.114.102 port 55364 ssh2
Jul 28 18:13:03 TORMINT sshd\[19397\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=69.162.114.102  user=root
...
2019-07-29 11:48:00
36.72.218.155 attackspambots
SSH Bruteforce
2019-07-29 11:46:44
184.82.9.233 attackspam
Jul 28 23:17:41 km20725 sshd\[23820\]: Address 184.82.9.233 maps to 184-82-9-0.24.public.erhq-mser.myaisfibre.com, but this does not map back to the address - POSSIBLE BREAK-IN ATTEMPT!Jul 28 23:17:43 km20725 sshd\[23820\]: Failed password for root from 184.82.9.233 port 50240 ssh2Jul 28 23:23:11 km20725 sshd\[24170\]: Address 184.82.9.233 maps to 184-82-9-0.24.public.erhq-mser.myaisfibre.com, but this does not map back to the address - POSSIBLE BREAK-IN ATTEMPT!Jul 28 23:23:13 km20725 sshd\[24170\]: Failed password for root from 184.82.9.233 port 45964 ssh2
...
2019-07-29 11:23:04
58.211.189.178 attack
Many RDP login attempts detected by IDS script
2019-07-29 11:18:48
112.27.129.78 attack
'IP reached maximum auth failures for a one day block'
2019-07-29 12:21:21
171.221.255.5 attack
failed_logins
2019-07-29 12:23:16
180.164.94.173 attackbots
Jul 28 19:41:41 TORMINT sshd\[24594\]: Invalid user kje from 180.164.94.173
Jul 28 19:41:41 TORMINT sshd\[24594\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=180.164.94.173
Jul 28 19:41:44 TORMINT sshd\[24594\]: Failed password for invalid user kje from 180.164.94.173 port 49366 ssh2
...
2019-07-29 12:24:42
223.245.212.172 attack
Brute force SMTP login attempts.
2019-07-29 11:25:38
37.187.90.37 attackbotsspam
Jul 29 04:36:33 SilenceServices sshd[26836]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=37.187.90.37
Jul 29 04:36:34 SilenceServices sshd[26836]: Failed password for invalid user lovelly from 37.187.90.37 port 52850 ssh2
Jul 29 04:40:51 SilenceServices sshd[29349]: Failed password for root from 37.187.90.37 port 50171 ssh2
2019-07-29 11:19:05
192.36.164.94 attackbots
20 attempts against mh-ssh on mist.magehost.pro
2019-07-29 11:52:19
144.217.14.14 attackspam
xmlrpc attack
2019-07-29 11:54:34
125.130.110.20 attackbots
Jul 29 04:23:51 mail sshd\[19827\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=125.130.110.20  user=root
Jul 29 04:23:53 mail sshd\[19827\]: Failed password for root from 125.130.110.20 port 55510 ssh2
Jul 29 04:29:21 mail sshd\[19860\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=125.130.110.20  user=root
...
2019-07-29 11:42:31
178.72.128.253 attack
Automatic report - Port Scan Attack
2019-07-29 11:24:47
34.215.48.135 attackspam
Jul 29 03:25:50 MK-Soft-VM3 sshd\[9202\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=34.215.48.135  user=root
Jul 29 03:25:52 MK-Soft-VM3 sshd\[9202\]: Failed password for root from 34.215.48.135 port 58038 ssh2
Jul 29 03:35:32 MK-Soft-VM3 sshd\[9603\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=34.215.48.135  user=root
...
2019-07-29 11:50:44

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