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https://sanofi.com

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
88
GRADE
B
FIX
1
REVIEW
3
PASS
5
INFO
0
Probed from Amsterdam, Netherlands
301 Moved Permanently
Checks
9
5 PASS 3 REVIEW 1 FIX
D
CDN & Delivery
Action
No CDN detected
FIX
No CDN detected
Warning::
No CDN detected
A CDN can significantly improve load times for users around the world by caching content at edge nodes closer to them.
No CDN detected

Consider using a CDN to improve global delivery speed and reduce origin load.

B
Redirect Chain
2 redirect(s), 409 ms total
REVIEW
2 redirect(s), 409 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

https://sanofi.com

65 ms · HTTP/1.1

301

https://www.sanofi.com/

339 ms · HTTP/1.1

308

https://www.sanofi.com/en

5 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://sanofi.com30165 msHTTP/1.1Apache/2.4.66 ()
2https://www.sanofi.com/308339 msHTTP/1.1
3https://www.sanofi.com/en2005 msHTTP/1.1

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
66 days until leaf cert expires — 3 issues to address
REVIEW

Certificate validity

66
days left
0d 30d 60d 90d+

Recommended actions

  • Enable HSTS: Strict-Transport-Security: max-age=31536000; includeSubDomains
  • Enable DNSSEC on your domain for DNS spoofing protection
  • Enable OCSP stapling on your TLS server to remove a CA roundtrip and protect user privacy
A+
DNS Records
2 A records, 14 ms lookup
PASS
2 A records, 14 ms lookup
Info::
Resolves to 2 IPv4 address(es)
Got: 3.251.44.146, 52.18.193.106
Info::
No IPv6 (AAAA) records
Info::
4 nameserver(s) configured
Got: ns1.sanofi-synthelabo.com, ns2.sanofi-synthelabo.com, ns3.sanofi-synthelabo.com, ns4.sanofi-synthelabo.com
Info::
2 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: 14 ms
Got: 14 ms
A3.251.44.146, 52.18.193.106
AAAA—
CNAME—
NSns1.sanofi-synthelabo.com, ns2.sanofi-synthelabo.com, ns3.sanofi-synthelabo.com, ns4.sanofi-synthelabo.com
MX
5 de-smtp-inbound-1.mimecast.com
5 de-smtp-inbound-2.mimecast.com
TXT
015y5l8cwr1ktr25750rcmqmch0rw733
7v1zw7jkb8bsdpm7wq1vwydsklcr8xty
BHkTtzPH=9d8f7f7e683fa51eda16c8e7d2986d4e
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA3/oGSyEyD6Bg86wVv0NlX/W57rg5WbO0wKKS...
MS=ms59110129
N3YNY9NKA8K9RT5NCPHP3U6R4WRKTSX6PN4EWR87NQK4NB3SER3YBRXL5MFNHG33
NB07BXwwj39ybq5aCF5PZfNwFXyq2oLh/rpK7ewwAhs=
SFMC-9-ODOdFL7HsemKaXOL4heSJrvUKqH4j9ohFmFeLC
_ldelnraonu22jrkk21zdm2e972btbrj
_yst7z08c36oz25fk7sllqb87pt7mbsb
amazonses:8UKDkTD99x//sELPj6SmHSjLJcVjM8RH0MhH5bjod9w=
apple-domain-verification=Y0VJfMMVpKBRjVRF
atlassian-domain-verification=41WHRt8pLBQeloLxmM345GdKSqc7IH/i/60GgYaTbJyLEaJvIh...
atlassian-domain-verification=5lZ81HepdZsv6mVuMfgPttecJqNtFfLc1wYxHvF9A7yZS2+tWP...
atlassian-domain-verification=i7O/SO/Q3P8iXPRkp/iBhcRpkxwQ1QqWQOZRx01JRbz30YZtto...
brevo-code:75ecd9d2c0ad912254128732f8265d28
cisco-ci-domain-verification=1223454b436b900f3f05ecd959c1e36af8e34bd1cbaaf719ba5...
cisco-ci-domain-verification=2fc6f73e419d66eca2c4603ff2b76b725624775f6012a517105...
cursor-domain-verification-4tfc5k=Ts5Z4p1X3tkqIz3vB2Y9ULKiD
dtm-domain-verification=4szPUFdyjcYtiagUOF_302jgZdJAPDlxTSB0x7LLj-g
facebook-domain-verification=dtyujxwqq81e93xugw4jwm0ry5097c
facebook-domain-verification=tc4j4pzzuv0selmih7fch9pke17n71
figma-domain-verification=93d6cbbbeff4f577dd4c909b971cdf3f84e923c67d4fba718a02f9...
globalsign-domain-verification=mO6E0gOvPuScqCp_fWor9bFAwKcgUa-ukSEHn1nK1V
google-site-verification=n-51zLgFP2CJeW-lckyXi80hx0Gw453X1MWkDuETpFk
google-site-verification=yBhW7xBN3LTCBKmo7H6M0rNRxhfdV7XNrcrRTq-vij8
io7lbbfs16ukdlv3o5h4sid680
jamf-site-verification=UiAQmd1YMvEobyS8GxURhw
m0jCUq1B+Ei1DCLuzoD8sdcxXCnj6yWsWHaaKpV90ng=
miro-verification=bb84b539f095145588a21d54bcc6c9f01e90dcdf
ms-domain-verification=6e77af2d-887d-4f49-80f9-e0646d869a5e
n/zazkTeBK/seFc3mZyq76EnGRxe3Vdo+VtW/zKLIag=
n9eLl/tpArLrxfSuLMtuK4zdsXFS/WiVbsd8B85JJlA=
ndh204m1f87j82hu48khmcj200
o6N7gwcJH7WPresl/agMLIABMtlqwp5UxzYW20v8ywdht+n95JgVF1Aimtv6Q4cjGfKjok0LyYLRIHkt...
onetrust-domain-verification=929ad061e01441dc9bff0d25b54befcb
paloaltonetworks-site-verification=a675a21a7fe846bd27d5693bb1290467a8d2c445ad145...
segment-site-verification=6WicFo5iXYHlFNOaceK8IH8XFnuAssLi
sendinblue-code:5972ec5111b0a57a703b3342bf9f33ff
smartsheet-site-validation=RTAqznYXmWfp2aDHS7xhGpVavU9KejsG
v=DKIM1; t=s; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAz8ciPemZUPSDJ...
SPF v=spf1 include:spf-a.sanofi.com include:spf-c.sanofi.com include:spf.protection....
work-accounts-domain-verification=cz7du5m50lsPlkqQ34lvhEX196wzcw
CAALookup not available with standard resolver
Resolved in 14 ms

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 53 URLs
PASS
robots.txt present, sitemap with 53 URLs
Info::
robots.txt is present
Got: 74 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 53 entries
Info::
Sitemap index with 53 child sitemaps
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 74 B Sitemaps referenced 1 User-agents * Blocking No — crawling allowed
User-agent: *
Allow: /

Sitemap: https://www.sanofi.com/sitemap-index.xml
sitemap.xml 200 OK
Type Sitemap Index URLs 53 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::
HTTP correctly 301-redirects to HTTPS

www / non-www

308https://www.sanofi.com/
200https://sanofi.com/

HTTP → HTTPS

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

Consistent

A+
Domain Intelligence
sanofi.com — via CSC Corporate Domains, Inc., 30 years, 11 months old, hosted on AWS
PASS
sanofi.com — via CSC Corporate Domains, Inc., 30 years, 11 months old, hosted on AWS
Info::
Domain registered until Oct 12, 2034 (8 years, 7 months remaining)
Info::
DNSSEC is not enabled
DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it.
Info::
Registrar: CSC Corporate Domains, 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: AWS
Got: AS16509
Domain expiry

3042 days

October 12, 2034

SSL certificate

66 days

Issued by Amazon

Domain age

30 years, 11 months

Registered October 13, 1995

DNSSEC

Not enabled

Protects against DNS spoofing

Hosting

AWS

ASN AS16509

3.251.44.146

Registrar

CSC Corporate Domains, Inc.

Unlocked 4 NS records
Expiry timeline
Today
+1 year
Domain expiry SSL expiry Danger zone (≤30 days)
Recommended actions
  • Enable DNSSEC to protect visitors from DNS spoofing
  • Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
Registrar CSC Corporate Domains, Inc.
Created October 13, 1995 (30 years, 11 months ago)
Expires October 12, 2034 (8 years, 7 months)
Last Updated January 14, 2025
Name Servers ns1.sanofi-synthelabo.com, ns2.sanofi-synthelabo.com, ns3.sanofi-synthelabo.com, ns4.sanofi-synthelabo.com
DNSSEC Not enabled
Hosting
IP Address 3.251.44.146
ASN AS16509 (AMAZON-02 - Amazon.com, Inc., US)
Provider AWS
Data source: rdap (0.2s)

DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it.

Why this matters

Without DNSSEC, an attacker who can poison your DNS can hijack your domain — and SSL certs alone don't stop them.

Learn more ▾

DNSSEC adds cryptographic signatures to DNS records, preventing forged responses from poisoning resolver caches. Without it, an attacker who controls the network path can redirect your domain to a malicious server before any HTTPS handshake happens. Most modern registrars (Cloudflare, Google Domains, Route 53) enable it with one toggle.

Source: ICANN / RFC 4033

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 59 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
5 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.
19 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
59 ms
Total Time Total request time from DNS lookup through full response.
59 ms

Connection waterfall

DNS Lookup 5 ms TCP Connect 17 ms TLS Handshake 19 ms Server Processing 18 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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