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

Internet Service Provider: Proofpoint Inc.

Hostname: unknown

Organization: unknown

Usage Type: Data Center/Web Hosting/Transit

Comments:
Type Details Datetime
attackbots
Nov  2 17:23:05 nopemail postfix/smtpd[15586]: NOQUEUE: reject: RCPT from unknown[148.163.128.145]: 450 4.1.8 : Sender address rejected: Domain not found; from= to= proto=ESMTP helo=
...
2019-11-10 22:17:58
Comments on same subnet:
No discussion about this subnet yet..
Whois info:
b
Dig info:
; <<>> DiG 9.10.3-P4-Ubuntu <<>> 148.163.128.145
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 7299
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1

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

;; AUTHORITY SECTION:
.			579	IN	SOA	a.root-servers.net. nstld.verisign-grs.com. 2019111000 1800 900 604800 86400

;; Query time: 117 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Sun Nov 10 22:17:50 CST 2019
;; MSG SIZE  rcvd: 119
Host info
Host 145.128.163.148.in-addr.arpa. not found: 3(NXDOMAIN)
Nslookup info:
Server:		183.60.83.19
Address:	183.60.83.19#53

** server can't find 145.128.163.148.in-addr.arpa: NXDOMAIN
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6379/tcp 1433/tcp 9200/tcp...
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