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Total

DNS

Email

Security

Network

100

Availability

Domainpenguinrandomhouse.com

IPv41

IPv60

MX records2

StatusActive

Domain technical report

Penguin Random House

penguinrandomhouse.com

Committed to publishing great books, connecting readers and authors globally, and spreading the love of reading.

Generated: 2026-08-08T20:27:40-05:00 · Cached result

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IPv41

IPv60

MX2

NS4

DiagnosticsMain findings and recommendations

✓

IPv4 (A)30 / 30 pts · Dns

1 IPv4 address(es) detected.

IPv6 (AAAA)0 / 10 pts · Dns

0 IPv6 address(es) detected.

✓

Name server redundancy20 / 20 pts · Dns

4 NS record(s); 2 or more required.

✓

SOA record10 / 10 pts · Dns

Authoritative zone record.

✓

DNSSEC chain15 / 15 pts · Dns

DS and DNSKEY detected.

CAA policy0 / 5 pts · Dns

Certificate authority restriction.

✓

DNS propagation10 / 10 pts · Dns

Agreement between public resolvers.

✓

MX records20 / 20 pts · Mail

2 MX record(s).

✓

SPF25 / 25 pts · Mail

SPF policy published.

✓

DMARC25 / 25 pts · Mail

DMARC policy published.

✓

DKIM20 / 20 pts · Mail

A DKIM selector was verified.

MTA-STS0 / 5 pts · Mail

Mail transport policy.

TLS-RPT0 / 5 pts · Mail

TLS reporting policy.

✓

Valid TLS certificate55 / 55 pts · Security

153 day(s) remaining.

✓

Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

HTTP security headers16 / 35 pts · Security

4 of 9 evaluated headers detected.

PTR reverse DNS0 / 30 pts · Network

PTR not detected.

IPv4 diversity20 / 35 pts · Network

Two or more IPv4 addresses receive full points.

IPv6 connectivity0 / 35 pts · Network

AAAA availability.

✓

DNS resolution40 / 40 pts · Availability

At least one address family must resolve.

✓

HTTP response40 / 40 pts · Availability

HTTP/2 200

✓

HTTPS final URL20 / 20 pts · Availability

Final URL uses HTTPS.

DNS and emailPublished records and email configuration

A

1 record(s)

170.171.208.137

AAAA

0 record(s)

—

Not configured

CNAME

0 record(s)

—

Not configured

MX

2 record(s)

10 us-smtp-inbound-2.mimecast.com.
10 us-smtp-inbound-1.mimecast.com.

TXT

16 record(s)

"airtable-verification=07656b9d1c59ef275dc5cf2cc40f902f"
"twilio-domain-verification=fc6fe5f3866856223b427fe22f87cacc"
"miro-verification=20deb2e76b80e8360f078ce72b4c1b020ccbe7e1"
"p^80Ofvy%178DnED&JH$OktbSDSDHdBu8r5TXqXJUzrLTNplO6PB1VAb%#xV06wEKl7lOoFd2erdL@$w0BThd9#s6rEd%9C%tPu"
"atlassian-domain-verification=Kl3ByU1tsfV9fKiC7TDDZYz1uCeTeUo0SSEh5SitZ9q99Ua74O571fgiIg//j5Hn"
"asv=300738b15ca5d787a896887a6179da76"
"anthropic-domain-verification-p3yxqz=0oTx7Z8mJYN8MCnVfLRuy7xrz"
"applause-verification:e7f9bc17-1978-415a-83ab-955ebc93e7eb"
"openai-domain-verification=dv-Rhm7Hg5yRtoNsmysb1sZR4hb"
"canva-site-verification=qrGQ4gxWAdHknibYOR88zw"
"v=spf1 include:%{i}._ip.%{h}._ehlo.%{d}._spf.vali.email ~all"
"HmQrtF+YeGABOOs4sUIGNzx5oH/hxa/uuKITM72aP2D3Mmo45+IYTHRRNErkCFI5FluDKT7Og9fYZwF4n3wWlw=="
"sophos-domain-verification=30c16c4ad4dd85043d6766d195b3be1bf04c9425e55a4a79745bd7a135474f3b"
"d240bb6782951c680216e3b2c275a67a287ab413a4dbc83ff6"
"smartsheet-site-validation=cVJvac04NWxSPbNbKVyoQXTc977egjBr"
"apple-domain-verification=fSsk2qTskZIXUkhu"

NS

4 record(s)

ns-1259.awsdns-29.org.
ns-1709.awsdns-21.co.uk.
ns-362.awsdns-45.com.
ns-643.awsdns-16.net.

SOA

1 record(s)

ns-1259.awsdns-29.org. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400

CAA

0 record(s)

—

Not configured

DS

1 record(s)

54018 13 2 82CF9553BD8C46B8D2A917E551CBB8D2D4EC70C54FC5F540B9108BC8 F5E41521

DNSKEY

3 record(s)

256 3 13 3s9zVJrFr8o3AzCUkM4HXGINwmWJ6AkDFqWk2JZk9kN+p+ZuxJuJ3jFG /qNbkntpUtTr/8dAJwbn3pGk4ttZig==
256 3 13 IFVPlSvpcCqMhVRmMLwirSq0+wJ1uOG4XnZ4R4RxsAwsQQfpW4pSYn+u K5uABrdu+Pi/jRiL9S92x7ubTsH3+A==
257 3 13 yYbn5AYil/ZGAWhDvEqI+HSfl366kG1Y+mD5gSYmQhmNCG+RUKr1aQPR uvvgLVdjRVJi7yhYzQDvmJLdfqEkAA==

RRSIG

4 record(s)

DNSKEY 13 2 3600 20260809100000 20260808230000 54018 penguinrandomhouse.com. g7WhKfM5VfgE8i7YjA6JnIO+qGBNTGOdRi/oo/kPVXmCqaWBHgsNOzv2 hR5D4CCgUygvaukpTTn7+V2gm8sXJw==
NS 13 2 172800 20260811022734 20260809002734 15748 penguinrandomhouse.com. hlw9f7Qgb3ChroQunn3iV7pAd4cXWIHz3sf9B3AIShNkyWq4ODbyDLFd BcA0HT/vOTxQ00Iv7rlQTkVfjkM6og==
A 13 2 600 20260809023733 20260809002733 15748 penguinrandomhouse.com. dFudhjrVA0AwPQaTyJrDrCfcRNgqMHw11HkpwOc7adksefe3X9BdyCCo 7yqxhMfs0KETGVrOEwCewPggM1YKXg==
DS 13 2 86400 20260815002732 20260807231732 41446 com. 827r/4TTC2rgoa4+FY2/WY2yPK+/IqxW5OSRHS+9U0jWxcu9afwFnXM5 +/3rm2KvLM4bPFbY25zEjn3uDB3j9w==

NSEC

0 record(s)

—

Not configured

NSEC3

0 record(s)

—

Not configured

SRV

0 record(s)

—

Not configured

NAPTR

0 record(s)

—

Not configured

TLSA

0 record(s)

—

Not configured

SSHFP

0 record(s)

—

Not configured

SPF

Configured

v=spf1 include:%{i}._ip.%{h}._ehlo.%{d}._spf.vali.email ~all

DMARC

Configured

v=DMARC1; p=quarantine; pct=100; adkim=r; aspf=r; rua=mailto:dmarc_agg@vali.email,mailto:4065f1db5e3e741@rep.dmarcanalyzer.com,mailto:bb918c48@inbox.ondmarc.com; ruf=mailto:4065f1db5e3e741@for.dmarcanalyzer.com,mailto:bb918c48@inbox.ondmarc.com; fo=1; ri=3600

DKIM

Selector k1

k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDbNrX2cY/GUKIFx2G/1I00ftdAj713WP9AQ1xir85i89sA2guU0ta4UX1Xzm06XIU6iBP41VwmPwBGRNofhBVR+e6WHUoNyIR4Bn84LVcfZE20rmDeXQblIupNWBqLXM1Q+VieI/eZu/7k9/vOkLSaQQdml4Cv8lb3PcnluMVIhQIDAQAB;

Analyzed webpageMetadata and HTTP response

Title and description

Extracted

Title

Penguin Random House

Description

Committed to publishing great books, connecting readers and authors globally, and spreading the love of reading.

Final URL

https://www.penguinrandomhouse.com/

HTTP status

200

HTTP

Status

HTTP/2 200

Final URL

https://www.penguinrandomhouse.com/

Version

Server

nginx

X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available

Yes

Issuer

Sectigo Limited

*.penguinrandomhouse.com

Valid from

2025-12-15T18:00:00-06:00

Valid until

2027-01-09T17:59:59-06:00

Days remaining

153

Protocol

TLSv1.2

Cipher

ECDHE-RSA-AES256-GCM-SHA384

Security headers

4 active

✓

HSTSImplemented

✓

Content Security PolicyImplemented

✓

X-Content-Type-OptionsImplemented

—

X-Frame-OptionsNot detected

✓

Referrer PolicyImplemented

—

Permissions PolicyNot detected

—

Cross-Origin-Opener-PolicyNot detected

—

Cross-Origin-Embedder-PolicyNot detected

—

Cross-Origin-Resource-PolicyNot detected

DNS propagationComparison across public resolvers

Public resolver comparison

Consistent

✓

Consistent propagation

5 public resolvers queried.

ResolverServerResultLatency

Google

8.8.8.8

170.171.208.137

54,02 ms

Cloudflare

1.1.1.1

170.171.208.137

30,18 ms

Quad9

9.9.9.9

170.171.208.137

47,85 ms

OpenDNS

208.67.222.222

170.171.208.137

53,40 ms

AdGuard

94.140.14.14

170.171.208.137

70,17 ms

IP, geolocation and ASNAssociated network information

170.171.208.137

No data

success

country

region

city

asn

organization

isp

Visitor information

Visitor

216.73.217.62

reverse

country

country_code

region

city

latitude

longitude

isp

organization

asn

timezone

browser

Other

language

user_agent

Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)

is_bot

Yes

cloudflare

SMTPEmail port connectivity

us-smtp-inbound-2.mimecast.com

Port 25: Closed/unreachable - 30.7 ms - 
Port 465: Closed/unreachable - 4020.8 ms - 
Port 587: Closed/unreachable - 27.6 ms - 220 us-smtp-inbound-1.mimecast.com ESMTP; Sat, 08 Aug 2026 21:27:40 -0400

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