`randomhouseacademic.com`

DNSSEC	⚠️ Not signed
A	18.211.120.133^{🇺🇸 Amazon18.208.0.0/13 EC2 IAD prefix}
		PTR	`ec2-18-211-120-133.compute-1.amazonaws.com`
A	44.219.250.216^{🇺🇸 Amazon44.192.0.0/11 EC2 IAD prefix}
A	52.204.53.5^{🇺🇸 Amazon52.200.0.0/13 EC2 IAD prefix}
NS	`ns1.prh.com` ⭐
		A	107.162.234.197^{🇺🇸 DEFENSENET-1107.162.234.0/24 F5 via EMIX}
NS	`ns2.prh.com`
		A	107.162.176.221^{🇺🇸 DEFENSENET-1107.162.176.0/24 F5 via EMIX}
MX	`us-smtp-inbound-1.mimecast.com` ⭐
		A	170.10.128.141^{🇺🇸 Mimecast-NA170.10.128.0/23 191 Spring St Lexington MA 02421 United States}
			PTR	`us-smtp-inbound-1.mimecast.com`
			PTR	`us-smtp-inbound-2.mimecast.com`
		A	170.10.128.221^{🇺🇸 Mimecast-NA170.10.128.0/23 191 Spring St Lexington MA 02421 United States}
			PTR	`us-smtp-inbound-1.mimecast.com`
			PTR	`us-smtp-inbound-2.mimecast.com`
		A	170.10.128.242^{🇺🇸 Mimecast-NA170.10.128.0/23 191 Spring St Lexington MA 02421 United States}
			PTR	`us-smtp-inbound-1.mimecast.com`
			PTR	`us-smtp-inbound-2.mimecast.com`
		A	170.10.132.141^{🇺🇸 Mimecast-NA170.10.132.0/23 191 Spring St Lexington MA 02421 United States}
			PTR	`us-smtp-inbound-1.mimecast.com`
			PTR	`us-smtp-inbound-2.mimecast.com`
		A	170.10.132.221^{🇺🇸 Mimecast-NA170.10.132.0/23 191 Spring St Lexington MA 02421 United States}
			PTR	`us-smtp-inbound-1.mimecast.com`
			PTR	`us-smtp-inbound-2.mimecast.com`
		A	170.10.132.242^{🇺🇸 Mimecast-NA170.10.132.0/23 191 Spring St Lexington MA 02421 United States}
			PTR	`us-smtp-inbound-1.mimecast.com`
			PTR	`us-smtp-inbound-2.mimecast.com`
MX	`us-smtp-inbound-2.mimecast.com` ⭐
		A	170.10.128.141^{🇺🇸 Mimecast-NA170.10.128.0/23 191 Spring St Lexington MA 02421 United States}
			PTR	`us-smtp-inbound-1.mimecast.com`
			PTR	`us-smtp-inbound-2.mimecast.com`
		A	170.10.128.221^{🇺🇸 Mimecast-NA170.10.128.0/23 191 Spring St Lexington MA 02421 United States}
			PTR	`us-smtp-inbound-1.mimecast.com`
			PTR	`us-smtp-inbound-2.mimecast.com`
		A	170.10.128.242^{🇺🇸 Mimecast-NA170.10.128.0/23 191 Spring St Lexington MA 02421 United States}
			PTR	`us-smtp-inbound-1.mimecast.com`
			PTR	`us-smtp-inbound-2.mimecast.com`
		A	170.10.132.141^{🇺🇸 Mimecast-NA170.10.132.0/23 191 Spring St Lexington MA 02421 United States}
			PTR	`us-smtp-inbound-1.mimecast.com`
			PTR	`us-smtp-inbound-2.mimecast.com`
		A	170.10.132.221^{🇺🇸 Mimecast-NA170.10.132.0/23 191 Spring St Lexington MA 02421 United States}
			PTR	`us-smtp-inbound-1.mimecast.com`
			PTR	`us-smtp-inbound-2.mimecast.com`
		A	170.10.132.242^{🇺🇸 Mimecast-NA170.10.132.0/23 191 Spring St Lexington MA 02421 United States}
			PTR	`us-smtp-inbound-1.mimecast.com`
			PTR	`us-smtp-inbound-2.mimecast.com`
SOA	`ns1.prh.com`postmaster@randomhouse.com 2024-03-29 #0

`com`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.gtld-servers.net` ⭐
	NS	`b.gtld-servers.net`
	NS	`c.gtld-servers.net`
	NS	`d.gtld-servers.net`
	NS	`e.gtld-servers.net`
	NS	`f.gtld-servers.net`
	NS	`g.gtld-servers.net`
	NS	`h.gtld-servers.net`
	NS	`i.gtld-servers.net`
	NS	`j.gtld-servers.net`
	NS	`k.gtld-servers.net`
	NS	`l.gtld-servers.net`
	NS	`m.gtld-servers.net`
	SOA	`a.gtld-servers.net`nstld@verisign-grs.com serial=1771291435

Subdomains

www.randomhouseacademic.com

Same first word

randomhouseacademic.com

DNS History

10 records (7 active, 3 former)

○NSdns1.randomhouse.com2015-07-17 → 2018-08-17 · 4 obs

● 2015-07-17 09:56:04
● 2018-08-17 17:06:42
○ 2026-02-19 21:32:46
○ 2026-03-19 10:43:56

○NSdns2.randomhouse.com2015-07-17 → 2018-08-17 · 4 obs

● 2015-07-17 09:56:04
● 2018-08-17 17:06:42
○ 2026-02-19 21:32:46
○ 2026-03-19 10:43:56

●NSns1.prh.com2026-02-19 → 2026-03-19 · 3 obs

○ 2018-08-17 17:06:42
● 2026-02-19 21:32:46
● 2026-03-19 10:43:56

●NSns2.prh.com2026-02-19 → 2026-03-19 · 3 obs

○ 2018-08-17 17:06:42
● 2026-02-19 21:32:46
● 2026-03-19 10:43:56

●MXus-smtp-inbound-1.mimecast.com2015-07-17 → 2026-03-19 · 2 obs

● 2015-07-17 09:56:04
● 2026-03-19 10:43:56

●MXus-smtp-inbound-2.mimecast.com2015-07-17 → 2026-03-19 · 2 obs

● 2015-07-17 09:56:04
● 2026-03-19 10:43:56

○A170.171.208.2062015-07-17 → 2018-08-17 · 4 obs

● 2015-07-17 09:56:04
● 2018-08-17 17:06:42
○ 2026-02-19 21:32:46
○ 2026-03-19 10:43:56

●A18.211.120.1332026-02-19 → 2026-03-19 · 3 obs

○ 2018-08-17 17:06:42
● 2026-02-19 21:32:46
● 2026-03-19 10:43:56

●A44.219.250.2162026-02-19 → 2026-03-19 · 3 obs

○ 2018-08-17 17:06:42
● 2026-02-19 21:32:46
● 2026-03-19 10:43:56

●A52.204.53.52026-02-19 → 2026-03-19 · 3 obs

○ 2018-08-17 17:06:42
● 2026-02-19 21:32:46
● 2026-03-19 10:43:56

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	j.gtld-servers.net, m.gtld-servers.net, i.gtld-servers.net, c.gtld-servers.net...	-
randomhouseacademic.com	ns1.prh.com, ns2.prh.com	2 records

✅ Authoritative Response

Server: 107.162.176.221

NS records: ns1.prh.com, ns2.prh.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for randomhouseacademic.com (unsigned zone)

⏱️ Timing

Total: 765ms | Queries: -

📄 Records

Type	Count	Sample Data
A	3	`44.219.250.216, 18.211.120.133...`
NS	2	`ns2.prh.com, ns1.prh.com`
MX	2	`us-smtp-inbound-2.mimecast.com (pri: 10), us-smtp-inbound-1.mimecast.com (pri: 10)`
SOA	1	`ns1.prh.com postmaster.randomhouse.com`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns1.prh.com, ns2.prh.com)

Analysis

Hierarchy

randomhouseacademic.com is the parent of www.randomhouseacademic.com.

IP Addresses

randomhouseacademic.com points to three IP numbers: 18.211.120.133, 44.219.250.216 and 52.204.53.5.

Other host names including penguinrandomhouse.sk, pennyvincenzibooks.com, riverheadbooks.biz, tastebook.us and rodalebooks.com share IP numbers with randomhouseacademic.com.

Name Servers

randomhouseacademic.com's delegation uses two name servers, ns1.prh.com and ns2.prh.com.

randomhouseacademic.com shares the same name server setup as other domains, for example outofprint.com, lovethatboybook.com, obamantheaudacityofhopesite.net, jove.biz and isflix.com.

Host names with a single IP:

ns1.prh.com points to 107.162.234.197.

ns2.prh.com points to 107.162.176.221.

Mail Servers

randomhouseacademic.com is handled by two mail servers: us-smtp-inbound-1.mimecast.com and us-smtp-inbound-2.mimecast.com.

randomhouseacademic.com shares its mail server setup with other domains, including icbk.com, shopthebay.com, coastallifewealth.com, ilmolaw.com and trkheli.com.

The mail servers for randomhouseacademic.com are shared with other domains, for instance axiom-ag.com, spectrumconst.com, kinetix.com, hwglaw.com and bregvision.com.