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https://dnb.com

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
87
GRADE
B
FIX
0
REVIEW
4
PASS
5
INFO
0
Probed from Madrid, Spain
301 Moved Permanently
Checks
9
5 PASS 4 REVIEW
B
Redirect Chain
2 redirect(s), 531 ms total
REVIEW
2 redirect(s), 531 ms total
Warning::
2 redirects before reaching final URL
Each redirect adds latency. Try to minimize the chain to 1 hop.
Info::
WWW normalization redirect
Info::
Redirect overhead: 531 ms total
Got: 531 ms

https://dnb.com

64 ms · HTTP/1.1

301

https://www.dnb.com/

291 ms · HTTP/1.1

301

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

175 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://dnb.com30164 msHTTP/1.1cloudflare
2https://www.dnb.com/301291 msHTTP/1.1cloudflare
3https://www.dnb.com/en-us/200175 msHTTP/1.1cloudflare

See the visual redirect chain in the HTTP Probe tab →

Each redirect adds latency. Try to minimize the chain to 1 hop.

Why this matters

Redirect chain — each hop adds latency; combine into one redirect where possible.

Source: Google Search Central / web.dev

C
IPv6 Readiness
Action
No IPv6 support
REVIEW
No IPv6 support
Info::
No IPv6 (AAAA) records found
IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.
No IPv6 Support
About 40% of internet users have IPv6. Consider adding AAAA records.

IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.

Why this matters

No AAAA records — same impact as 'no IPv6 (AAAA) records'; IPv6-preferring clients pay extra latency falling back to IPv4.

Source: Google IPv6 stats

B
TLS Certificate Expiry & Recommendations
61 days until leaf cert expires — 2 issues to address
REVIEW

Certificate validity

61
days left
0d 30d 60d 90d+

Recommended actions

  • Add the preload directive and submit to hstspreload.org once max-age + includeSubDomains are in place
  • Enable OCSP stapling on your TLS server to remove a CA roundtrip and protect user privacy
B
CDN & Delivery
Cloudflare
REVIEW
Cloudflare
Info::
Site is served via Cloudflare CDN (edge: CDG)
Got: cf-ray: 9effbf74fe17b8c3-CDG
CDN Detected: Cloudflare
Provider Cloudflare Evidence cf-ray: 9effbf74fe17b8c3-CDG
A+
DNS Records
1 A records, 29 ms lookup
PASS
1 A records, 29 ms lookup
Info::
Resolves to 1 IPv4 address(es)
Got: 104.16.0.1
Info::
Single A record — no DNS redundancy
Multiple A records provide failover if one server goes down.
Info::
No IPv6 (AAAA) records
Info::
6 nameserver(s) configured
Got: a1-67.akam.net, a7-66.akam.net, a12-66.akam.net, a6-66.akam.net, a10-67.akam.net, a13-66.akam.net
Info::
1 mail exchanger(s) configured
Info::
CAA records not checked
CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.
Info::
SPF record present in TXT
Info::
DNS resolution time: 29 ms
Got: 29 ms
A104.16.0.1
AAAA—
CNAME—
NSa1-67.akam.net, a7-66.akam.net, a12-66.akam.net, a6-66.akam.net, a10-67.akam.net, a13-66.akam.net
MX
0 dnb-com.mail.protection.outlook.com
TXT
SPF v=spf1 ip4:159.137.80.91 ip4:208.226.214.236 ip4:72.19.252.170 ip4:220.130.152.1...
_hc2sn83etkc85jlw447nruu9dhbpdy5
_hp7c20ah0ikfywn17wamfjh8p6786ox
ibmid=a9def6cf-843c-4d36-8eca-2c307149bd63
google-site-verification=ZVX3kiXRYyT5I8hIXfdxiVrgjftqr5S-waWjRxNXL0c
atlassian-domain-verification=owQCWYzgP3scaCY15u2L4MqN2a/Lda353UApAv4cEJPKscnJmV...
jamf-site-verification=XQrh0aSdNcFbATnbldtvFw
_t087nr0s8p25d17ouy1ln8ppt98veob
vertexinc-cloud-4c68f493-da79-4f7d-a07e-44d61f8c1b95
_bvsecjccauqilzo2plgsj9vbrqpp1yw
CAALookup not available with standard resolver
Resolved in 29 ms

Multiple A records provide failover if one server goes down.

Why this matters

Single A record means a single point of failure — if that IP goes down, your site is unreachable until DNS TTL expires.

Learn more ▾

Add multiple A records for round-robin failover, or use a managed DNS provider with health-checked failover (Route 53, Cloudflare, NS1). Short TTL (60-300s) lets clients recover faster on outages.

Source: SRE practice / DNS architecture

CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.

Why this matters

Informational: CAA (Certification Authority Authorization) records weren't checked in this scan.

A+
Crawlability
robots.txt present, sitemap with 26 URLs
PASS
robots.txt present, sitemap with 26 URLs
Info::
robots.txt is present
Got: 1402 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 26 entries
Info::
Sitemap index with 26 child sitemaps
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 1402 B Sitemaps referenced 1 User-agents *, ScoutJet, Twitterbot, GPTBot, Applebot Blocking No — crawling allowed
User-agent: *

Disallow: /benefits/

Disallow: /development/   

Disallow: /c/   

Disallow: /references/   

Disallow: /personalization/

Disallow: /investor-relations/ 

Disallow: /errorhandler/ 

Disallow: /content/dnb-mod/

Disallow: /content/dnb-us/

Disallow: /content/dnb/

Disallow: /content/dnb-uk/

Disallow: /content/dnb-ca/

Disallow: /content/dnb-ie/

Disallow: /content/dnb-lv/

Disallow: /content/dnb-ee/

Disallow: /content/dnb-se/

Disallow: /content/dnb-nb/

Disallow: /content/dnb-dk/

Disallow: /content/dnb-rs/

Disallow: /content/dnb-ba/

Disallow: /content/dnb-hr/

Disallow: /content/dnb-fi/

Disallow: /content/dnb-cz/

Disallow: /content/dnb-sk/

Disallow: /content/dnb-si/

Disallow: /content/dnb-hu/

Disallow: /content/dnb-pl/

Disallow: /content/dnb-de/

Disallow: /content/dnb-at/

Disallow: /content/dnb-ch/

Disallow: /content/dnb-gb/

Disallow: /content/dnb-collections/

Disallow: /content/connectors/content/

Disallow: /*/jcr:content/

Disallow: /jcr:content/ 

Disallow: /online-terms/ 

Disallow: /trade-partner/ 

Disallow: /content/dam/english/private/

Disallow: /site-search.html 

Disallow: /site-search-new.html 


Sitemap: https://www.dnb.com/sitemapindex.xml


User-agent: ScoutJet

Disallow: /


User-agent: Twitterbot

Disallow:


User-agent: GPTBot

Disallow: /business-directory/

Disallow: /contact-directory/

User-agent: Applebot
Crawl-delay: 1
sitemap.xml 200 OK
Type Sitemap Index URLs 26 entries Valid XML Yes
Child Sitemaps:
A+
URL Variants
www/non-www, trailing slash, HTTP→HTTPS
PASS
www/non-www, trailing slash, HTTP→HTTPS
Info::
www/non-www redirect configured correctly (preferred: non-www)
Info::
HTTP correctly 301-redirects to HTTPS

www / non-www

301https://www.dnb.com/
200https://dnb.com/

Preferred variant: non-www

HTTP → HTTPS

301http://dnb.com/ → https://www.dnb.com/

Consistent

A+
Domain Intelligence
dnb.com — via MarkMonitor Inc., 32 years, 7 months old, hosted on Cloudflare
PASS
dnb.com — via MarkMonitor Inc., 32 years, 7 months old, hosted on Cloudflare
Info::
Domain registered until Apr 1, 2030 (4 years remaining)
Info::
DNSSEC is enabled
Info::
Registrar: MarkMonitor Inc.
Warning::
Registrar lock is NOT enabled
The domain can be transferred without an unlock step. Enable registrar lock (clientTransferProhibited) in your registrar's control panel to protect against unauthorized or accidental transfers.
Info::
Hosting: Cloudflare
Got: AS13335
Domain expiry

1385 days

April 1, 2030

SSL certificate

61 days

Issued by Let's Encrypt

Domain age

32 years, 7 months

Registered March 9, 1994

DNSSEC

Enabled

Protects against DNS spoofing

Hosting

Cloudflare

ASN AS13335

104.16.0.1

Registrar

MarkMonitor Inc.

Unlocked 6 NS records
Expiry timeline
Today
+1 year
Domain expiry SSL expiry Danger zone (≤30 days)
Recommended actions
  • Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
Registrar MarkMonitor Inc.
Created March 9, 1994 (32 years, 7 months ago)
Expires April 1, 2030 (4 years)
Last Updated February 23, 2025
Name Servers a1-67.akam.net, a10-67.akam.net, a12-66.akam.net, a13-66.akam.net, a6-66.akam.net, a7-66.akam.net
DNSSEC Enabled
Hosting
IP Address 104.16.0.1
ASN AS13335 (CLOUDFLARENET - Cloudflare, Inc., US)
Provider Cloudflare
Data source: rdap (0.2s)

The domain can be transferred without an unlock step. Enable registrar lock (clientTransferProhibited) in your registrar's control panel to protect against unauthorized or accidental transfers.

Why this matters

Without registrar lock, an attacker who phishes your registrar credentials can transfer the domain in minutes — total brand hijack.

Learn more ▾

Registrar lock (clientTransferProhibited, clientUpdateProhibited, clientDeleteProhibited) requires extra verification before any transfer/update/delete. Every major registrar offers it free. Combined with 2FA on your registrar account, it's the strongest defense against domain hijacking.

Source: ICANN / domain-security best practice

A+
HTTP Probe Timing
Total 86 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
29 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
17 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
21 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
86 ms
Total Time Total request time from DNS lookup through full response.
86 ms

Connection waterfall

DNS Lookup 29 ms TCP Connect 17 ms TLS Handshake 21 ms Server Processing 19 ms Content Transfer 0 ms
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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