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Total

DNS

Email

100

Security

Network

Availability

Domaindnb.com

IPv41

IPv60

MX records1

StatusActive

Domain technical report

Just a moment...

dnb.com

Generated: 2026-08-08T23:47:31-05:00 · Cached result

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IPv41

IPv60

MX1

NS6

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

6 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

1 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

70 day(s) remaining.

✓

Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

✓

HTTP security headers35 / 35 pts · Security

9 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 response0 / 40 pts · Availability

HTTP/2 403

✓

HTTPS final URL20 / 20 pts · Availability

Final URL uses HTTPS.

DNS and emailPublished records and email configuration

A

1 record(s)

104.16.0.1

AAAA

0 record(s)

—

Not configured

CNAME

0 record(s)

—

Not configured

MX

1 record(s)

0 dnb-com.mail.protection.outlook.com.

TXT

13 record(s)

"anthropic-domain-verification-764yrq=RqVhnvCJYWlJXpbRDuGQKtG1T"
"_hp7c20ah0ikfywn17wamfjh8p6786ox"
"jamf-site-verification=XQrh0aSdNcFbATnbldtvFw"
"_bvsecjccauqilzo2plgsj9vbrqpp1yw"
"_hc2sn83etkc85jlw447nruu9dhbpdy5"
"vertexinc-cloud-4c68f493-da79-4f7d-a07e-44d61f8c1b95"
"ibmid=a9def6cf-843c-4d36-8eca-2c307149bd63"
"_t087nr0s8p25d17ouy1ln8ppt98veob"
"v=spf1 ip4:159.137.80.91 ip4:208.226.214.236 ip4:72.19.252.170 ip4:220.130.152.173 ip4:204.92.22.200/30 ip4:12.129.29.143 ip4:158.151.208.120/24 ip4:158.151.214.66/28 ip4:165.193.97.93" " ip4:72.14.161.10/31 ip4:158.106.68.11 ip4:205.216.45.11 ip4:209.112.4.10/31 ip4:209.66.117.11 ip4:209.123.45.224 include:spf.protection.outlook.com include:sendgrid.net include:_spf.salesforce.com" " include:spf1.dm.aliyun.com -all" ""
"google-site-verification=ZVX3kiXRYyT5I8hIXfdxiVrgjftqr5S-waWjRxNXL0c"
"dvv-domain-verification-gojb4bqvc-ddAd2hhf-21052026"
"Sterling-domain-verification=a4014a90cc2b4f7a8408e324283e96a6"
"atlassian-domain-verification=owQCWYzgP3scaCY15u2L4MqN2a/Lda353UApAv4cEJPKscnJmVDwKlOkdpSAKnXa"

NS

6 record(s)

a6-66.akam.net.
a1-67.akam.net.
a12-66.akam.net.
a13-66.akam.net.
a7-66.akam.net.
a10-67.akam.net.

SOA

1 record(s)

primaryns.dnb.com. dnsadmin.dnb.com. 2021085840 1200 600 1209600 3600

CAA

0 record(s)

—

Not configured

DS

1 record(s)

34892 13 2 A7A3E3FB04C8CFFAEACB6563C37972A4E8AE157B2855506DEB64C772 E065DC9B

DNSKEY

4 record(s)

256 3 13 XIK+XSyqXDvAL5dZfBO37cbqRB7Yiap0l9d01sd5v+Zid2cq+1za21lY 5e67gxQDoG26P7aTNrKzLHAXN9o7Eg==
257 3 13 M22Vehyh+58dDPF/dQQExCS1ywhCiE9iULphMcw0ZX46O28wGDjq6B3p 8JV8YUPmC2B0qjPCEzJ+y9zLEBy5tQ==
257 3 13 NTq6P0xMiu197MIyU+XHanOrEkot8hNcAFqLEUsdjFbZduFW6gYKL7Sx IbzwyLeVb+/DqBj+m+2/hC3EkXii4g==
256 3 13 /xFbW9zPRCeWBhK/u/45cxngqrvrkBieMVdXJThiqJvFQn+bKs7MOgJk Dguj10Mq5NoJ0vAza7693fM5M8FAKQ==

RRSIG

6 record(s)

NS 13 2 3600 20260811200534 20260808190534 62183 dnb.com. 5sUgsls7fbp9btgV21xE/c6pzA9AxdE6BmZIW6K5A1xYQzxeP063f2eU Zc1RryXTh8nTJUcJgmzNMefZn+BIzQ==
SOA 13 2 3600 20260811200534 20260808190534 62183 dnb.com. ALLtfDIuUn3A5NeoIZDffga8A8O/uk6R/oenmkpU0OhqPWkjwqB2pmhX axDNJseCRpGEX3blY4pjzW7mMPP6Mg==
TXT 13 2 60 20260811200534 20260808190534 62183 dnb.com. 3R76PoNd8cZRY0260aDBcExVmTiBrZU0jAOs9APgUMjuRnA0Qf4HdQur BlKXVsXG4PNFQz4cOibn7u2hhcdHDA==
MX 13 2 300 20260811200534 20260808190534 62183 dnb.com. I0Fi95u0UlQ7Kk46hfy5McmAd5LmZaueSIBQOETXjvHRo4wCs3Z2EvnO f9/h+InhBEArI935KiI7SPLRXWxe5g==
A 13 2 300 20260811200534 20260808190534 62183 dnb.com. 9TcgCIoR0bFoQb3RR9FTqr6QozIYGSM6a+lC6xZ0kS6a1F7P40k9thZt YCAJC3x+X8iCWEcVvTjcNHAudGMqAg==
DS 13 2 86400 20260813023023 20260806012023 41446 com. qnNbdwPiheOicR5TG66lh4aIEhDVagjIRqezSnTXCN+FBXRcxRMu2rE4 JDD3dgGptI5nLziQlXywuIAXyB4+Wg==

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 ip4:159.137.80.91 ip4:208.226.214.236 ip4:72.19.252.170 ip4:220.130.152.173 ip4:204.92.22.200/30 ip4:12.129.29.143 ip4:158.151.208.120/24 ip4:158.151.214.66/28 ip4:165.193.97.93 ip4:72.14.161.10/31 ip4:158.106.68.11 ip4:205.216.45.11 ip4:209.112.4.10/31 ip4:209.66.117.11 ip4:209.123.45.224 include:spf.protection.outlook.com include:sendgrid.net include:_spf.salesforce.com include:spf1.dm.aliyun.com -all

DMARC

Configured

v=DMARC1;p=reject;pct=100;fo=1;ruf=mailto:dmarc_afrf@auth.returnpath.net;rua=mailto:dmarc_agg@auth.returnpath.net

DKIM

Selector selector1

v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA0cKAs1523nCLURyPdQqYerq0Js/Beb+4YUmmh7TrxWtbrgzK3R2HnEJACxWWP4DFBbYB/ldyRqcL9hWM2fX7mP0Vb7z8+/xFThxThwblZrB5HUuRhKu2APepfFobu8zU0A+Ean+FAIPbKXFntnTpCSYzeTZktpOAfC2cZddYxnt1Dm46Sikp8260tTenPU7gi+9dW203NJem2QhklXlNKjwdZvIuel5aP/guWXTFe0ih4q6AHLhzuEvI4Ufmd+EJtgaAlLL/6bX3R1lVa6LT/XvpNTBZdKze8bP7FcglLvYLq6TWoGHT1Sx6vEUxYw1cuqVHUAK+xOYpYJpx9xDQ5QIDAQAB;

Analyzed webpageMetadata and HTTP response

Title and description

Extracted

Title

Just a moment...

Description

Final URL

https://www.dnb.com/en-us/

HTTP status

403

HTTP

Status

HTTP/2 403

Final URL

https://www.dnb.com/en-us/

Version

Server

cloudflare

X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available

Yes

Issuer

Let's Encrypt

dnb.com

Valid from

2026-07-20T09:33:07-05:00

Valid until

2026-10-18T09:33:06-05:00

Days remaining

Protocol

TLSv1.3

Cipher

TLS_AES_256_GCM_SHA384

Security headers

9 active

✓

HSTSImplemented

✓

Content Security PolicyImplemented

✓

X-Content-Type-OptionsImplemented

✓

X-Frame-OptionsImplemented

✓

Referrer PolicyImplemented

✓

Permissions PolicyImplemented

✓

Cross-Origin-Opener-PolicyImplemented

✓

Cross-Origin-Embedder-PolicyImplemented

✓

Cross-Origin-Resource-PolicyImplemented

DNS propagationComparison across public resolvers

Public resolver comparison

Consistent

✓

Consistent propagation

5 public resolvers queried.

ResolverServerResultLatency

Google

8.8.8.8

104.16.0.1

46,77 ms

Cloudflare

1.1.1.1

104.16.0.1

51,91 ms

Quad9

9.9.9.9

104.16.0.1

243,89 ms

OpenDNS

208.67.222.222

104.16.0.1

63,80 ms

AdGuard

94.140.14.14

104.16.0.1

68,72 ms

IP, geolocation and ASNAssociated network information

104.16.0.1

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

dnb-com.mail.protection.outlook.com

Port 25: Closed/unreachable - 22.6 ms - 
Port 465: Closed/unreachable - 4034.3 ms - 
Port 587: Closed/unreachable - 4020.2 ms -

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