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: Ashburn

Region: Virginia

Country: United States

Internet Service Provider: Amazon Technologies Inc.

Hostname: unknown

Organization: Amazon.com, Inc.

Usage Type: Data Center/Web Hosting/Transit

Comments:
Type Details Datetime
attackbotsspam
May  6 21:14:49 mail postfix/smtpd[91048]: NOQUEUE: reject: RCPT from keeper-us-east-1b.mxtoolbox.com[52.55.244.91]: 554 5.7.1 : Relay access denied; from= to= proto=ESMTP helo=
May  6 22:20:45 mail postfix/smtpd[1098]: NOQUEUE: reject: RCPT from keeper-us-east-1b.mxtoolbox.com[52.55.244.91]: 554 5.7.1 : Relay access denied; from= to= proto=ESMTP helo=
May  6 22:20:45 mail postfix/smtpd[1098]: NOQUEUE: reject: RCPT from keeper-us-east-1b.mxtoolbox.com[52.55.244.91]: 554 5.7.1 : Relay access denied; from= to= proto=ESMTP helo=
2020-05-07 07:05:18
attackbots
52.55.244.91 has been banned from MailServer for Abuse
...
2019-08-18 03:22:00
Comments on same subnet:
No discussion about this subnet yet..
Whois info:
b
Dig info:
; <<>> DiG 9.10.3-P4-Ubuntu <<>> 52.55.244.91
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 25707
;; flags: qr rd ra ad; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1

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

;; AUTHORITY SECTION:
.			3600	IN	SOA	a.root-servers.net. nstld.verisign-grs.com. 2019081700 1800 900 604800 86400

;; Query time: 2 msec
;; SERVER: 67.207.67.2#53(67.207.67.2)
;; WHEN: Sun Aug 18 03:21:55 CST 2019
;; MSG SIZE  rcvd: 116
Host info
91.244.55.52.in-addr.arpa domain name pointer keeper-us-east-1b.mxtoolbox.com.
Nslookup info:
Server:		67.207.67.2
Address:	67.207.67.2#53

Non-authoritative answer:
91.244.55.52.in-addr.arpa	name = keeper-us-east-1b.mxtoolbox.com.

Authoritative answers can be found from:
Related IP info:
Related comments:
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2020-01-16 03:35:16
222.186.15.10 attack
Jan 15 20:19:09 vpn01 sshd[13486]: Failed password for root from 222.186.15.10 port 51135 ssh2
Jan 15 20:19:12 vpn01 sshd[13486]: Failed password for root from 222.186.15.10 port 51135 ssh2
...
2020-01-16 03:19:20
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2020-01-16 03:22:38
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2020-01-16 03:10:38
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Unauthorized connection attempt detected from IP address 125.104.223.68 to port 1433 [T]
2020-01-16 03:27:58
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2020-01-16 03:28:45
58.30.80.209 attackspambots
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2020-01-16 03:38:33
180.164.212.45 attackspam
Unauthorized connection attempt detected from IP address 180.164.212.45 to port 85 [T]
2020-01-16 03:26:04
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Unauthorized connection attempt detected from IP address 42.114.216.94 to port 23 [J]
2020-01-16 03:40:07
60.170.126.176 attackbots
Unauthorized connection attempt detected from IP address 60.170.126.176 to port 23 [T]
2020-01-16 03:08:22
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Unauthorized connection attempt detected from IP address 61.142.119.19 to port 1433 [J]
2020-01-16 03:36:42
49.68.177.120 attackspam
Unauthorized connection attempt detected from IP address 49.68.177.120 to port 81 [J]
2020-01-16 03:10:12
45.178.3.232 normal
U
2020-01-16 03:06:37
110.186.5.151 attack
Unauthorized connection attempt detected from IP address 110.186.5.151 to port 23 [T]
2020-01-16 03:33:08

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