Skip to content
https://mountsinai.org

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
86
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.

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
URL Variants
www/non-www, trailing slash, HTTP→HTTPS
REVIEW
www/non-www, trailing slash, HTTP→HTTPS
Critical::
Both www and non-www versions serve content
Got: Both variants return 200 Expected: One variant 301-redirects to the other
Info::
HTTP correctly 301-redirects to HTTPS

www / non-www

200https://www.mountsinai.org/
200https://mountsinai.org/

Inconsistent — duplicate content risk

HTTP → HTTPS

301http://mountsinai.org/ → https://www.mountsinai.org/

Consistent

B
TLS Certificate Expiry & Recommendations
52 days until leaf cert expires — 4 issues to address
REVIEW

Certificate validity

52
days left
0d 30d 60d 90d+

Recommended actions

  • Prefer TLS 1.3 — TLS 1.2 is acceptable but TLS 1.3 removes RSA key exchange and improves latency
  • 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
1 A records, 14 ms lookup
PASS
1 A records, 14 ms lookup
Info::
Resolves to 1 IPv4 address(es)
Got: 146.203.138.44
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: a9-66.akam.net, a11-66.akam.net, a4-64.akam.net, a1-223.akam.net, a8-65.akam.net, a18-67.akam.net
Info::
10 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
A146.203.138.44
AAAA—
CNAME—
NSa9-66.akam.net, a11-66.akam.net, a4-64.akam.net, a1-223.akam.net, a8-65.akam.net, a18-67.akam.net
MX
10 smtp-agent05.mountsinai.org
10 smtp-agent06.mountsinai.org
10 smtp-agent03.mountsinai.org
10 smtp-agent01.mountsinai.org
10 smtp-agent04.mountsinai.org
10 smtp-agent02.mountsinai.org
20 smtp-agent11.mountsinai.org
20 smtp-agent13.mountsinai.org
20 smtp-agent14.mountsinai.org
20 smtp-agent12.mountsinai.org
TXT
docusign=57565c07-07f2-4530-b5db-e592d3c6b45f
atlassian-domain-verification=8GlS7b82cuN4GHqED2n2ojEmhEhTzdTO9JRvBiyiSU0kD3Wgsb...
MS=ms83027051
h1-domain-verification=re3ekiqUCyEMovPyhvRgqqm5HheCUX7pyiTtH8TZL3bxmass
google-gws-recovery-domain-verification=60940612
google-gws-recovery-domain-verification=66939864
/pGx4PfRuLPZN8vuwII5ePvfKrEVfBxGJ5Hk2CbbYaZKYHU5zapiXcQJztPiImSvo1EXmAVTj75xvIrr...
google-site-verification=f6GeHdbo4mcA2Qa4ce4u6MksxWdelB31eYYtg2hrSu0
google-site-verification=Wv-3nn0GOqxX7C4zQf1Rj2G-hrdxSBCJzIgnLPhOaY8
dell-technologies-domain-verification=mountsinai.org_80a65d82-0226-40d2-91ad-def...
google-gws-recovery-domain-verification=65526911
Dynatrace-site-verification=a39d5501-082c-40ff-b048-b0c018c10c80__lr2c0c05hqkqqi...
google-site-verification=NGBOArJS_wqJLoVpl3jwA3qIpR8MJsGOoX-obsTuHww
SPF v=spf1 ip4:40.84.22.152 ip4:205.201.24.98 ip4:68.233.77.16 ip4:146.203.0.0/16 ip...
google-site-verification=8z4TVhfFbxR-jE2ZaZ4dPtJs3LVTRSp7X3LVbi5l0HM
google-site-verification=GHKrmN3LmXMx0q6g4RQEKR8uw-4t1n_eep5WgmRccp8
google-gws-recovery-domain-verification=66749955
onetrust-domain-verification=b4260c77b78e4f8e9a74a9debd100bcd
x7ch2gscb7pr8vnvr8zyhmk4fm0777xx
apple-domain-verification=dEc5Y6mwn6aWjsd6
adobe-sign-verification=b73b882b881c2ad523c9d302b435047c
google-site-verification=IycD23U78z4uK-atADsBYkJGfXk9sfu9FRREblfFQwY
twilio-domain-verification=98f43d07afa64c8f87d2df239c1b6d5a
fg4rfb7sxtv3jkmv0c1jhmgx6hn841rc
atlassian-sending-domain-verification=677cdf93-f8be-4b0b-9de0-b798a82e72fe
WFKE3Rs49oxh2blH+dog99ipEXwV1EkOx8Lkk8/Y4fCBIs8uEcYUWiuLeBl+GKDxTHZr7lQyj9vFEOR0...
apple-domain-verification=ufB95Nc5_5GoSUZOAXlzRFBLe_xaMe3FjmKTMXjG9Po
jamf-site-verification=4HzAMFXvB7TUJGwvjgkNww
brevo-code:ecc039655e4e9551694bdfa8b63d380a
atlassian-domain-verification=2fE7nVV6DfCXSKajwLoZCkMxx7NiPrCqFTujaFVHdu8Vpy4Aua...
google-site-verification=1iu9mdjAMpqUPyu9-7Nq6XZSYrXC-Wb4rPlhjtBvnMc
amazonses:0Xp/9zsLOYlrLjCuNKH6Mocl20Ept77ud49q//5zPLs=
flexera-domain-verification-uywqmgofvyueeanf
google-site-verification=gr9yOEU3sSCWkqy0pqiwoHuPB075qJqbqNONZZutNyA
google-site-verification=9P3CMSBMceBkJfIpGzT26T5wbl4sfU1Xt4VqIHijUeE
globalsign-domain-verification=fgjeAu2vxQO1nR3lqHhd2_8BTB7WowOwDNhj17lKg8
5sdtck8qhchmgfjhnvjc5d9nnxtnplsn
pexip-ms-tenant-domain-verification=0bd31a27-3016-416c-8b9e-b96a309462a9
google-site-verification=i0Capqk9kbLQQQoxIt9asRX4RMpKS2Ef7kuogAbyi_8
openai-domain-verification=dv-JcSSgQak2u27Ru13eAEJ9va6
CAALookup not available with standard resolver
Resolved in 14 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
Redirect Chain
1 redirect(s), 546 ms total
PASS
1 redirect(s), 546 ms total
Info::
Single redirect
Got: https://mountsinai.org → https://www.mountsinai.org/ (301)
Info::
WWW normalization redirect
Info::
Redirect overhead: 546 ms total
Got: 546 ms

https://mountsinai.org

346 ms · HTTP/1.1

301

https://www.mountsinai.org/

200 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://mountsinai.org301346 msHTTP/1.1Apache
2https://www.mountsinai.org/200200 msHTTP/1.1Apache

See the visual redirect chain in the HTTP Probe tab →

A+
Crawlability
robots.txt present, sitemap with 1979 URLs
PASS
robots.txt present, sitemap with 1979 URLs
Info::
robots.txt is present
Got: 1507 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 1979 entries
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 1507 B Sitemaps referenced 4 User-agents Alexabot, Findxbot, SEMrushBot, SEMrushBot-Desktop, opensiteexplorer.org, PetalBot, *, CCBot, AhrefsBot, SEMrushBot-SA, dotbot, sufog.com, BLEXBot, rogerbot, Slurp, MauiBot, ads.mopub.com, MJ12bot, Yeti, MJ12 Blocking No — crawling allowed
User-agent: *
Disallow: /cgi-bin/
Disallow: /tmp/
Disallow: /vgn-ext/templating
Disallow: /*lp/
Disallow: /insurance/
Disallow: /about/preparedness/coronavirus/staff-resources*
Disallow: /about/covid19/staff-resources*

User-agent: Alexabot
Disallow: /about-us/newsroom/
Crawl-delay: 5

User-agent: CCBot
Disallow:
Crawl-delay: 20

User-agent: BLEXBot
Disallow:
Crawl-delay: 10

User-agent: Findxbot
Disallow:
Crawl-delay: 10

User-agent: rogerbot
Disallow: /about-us/newsroom/
Crawl-delay: 10

User-agent: Yeti
Disallow:
Crawl-delay: 10

User-agent: AhrefsBot
Disallow:
Crawl-delay: 10

User-agent: SEMrushBot
Disallow:
Crawl-delay: 10
 
User-agent: SEMrushBot-SA
Disallow:
Crawl-delay: 10

User-agent: SEMrushBot-Desktop
Disallow:
Crawl-delay: 10

User-agent: opensiteexplorer.org
Disallow:
Crawl-delay: 10

User-agent: dotbot
Disallow:
Crawl-delay: 20

User-agent: Slurp
Disallow:
Crawl-delay: 10

User-agent: sufog.com
Disallow: /

User-agent: MJ12
Disallow: /

User-agent: AhrefsBot
Disallow: /

User-agent: PetalBot
Disallow: /

User-agent: MauiBot
Disallow: /

User-agent: ads.mopub.com
Disallow: /

User-agent: MJ12bot
Disallow:
Crawl-delay: 10

Sitemap: https://www.mountsinai.org/files/MSHealth/Assets/sitemaps/care-sitemap.xml
Sitemap: https://www.mountsinai.org/files/MSHealth/Assets/sitemaps/healthlibrary-sitemap.xml
Sitemap: https://www.mountsinai.org/files/MSHealth/Assets/sitemaps/locations-sitemap.xml
Sitemap: https://www.mountsinai.org/files/MSHealth/Assets/sitemaps/doctors-sitemap.xml
sitemap.xml 200 OK
Type URL Set URLs 1979 entries Valid XML Yes
Sample URLs:
A+
Domain Intelligence
mountsinai.org — via Network Solutions, LLC, 30 years, 7 months old, hosted on MOUNT-SINAI - Mount Sinai School of Medicine, US
PASS
mountsinai.org — via Network Solutions, LLC, 30 years, 7 months old, hosted on MOUNT-SINAI - Mount Sinai School of Medicine, US
Info::
Domain registered until Feb 24, 2031 (4 years, 10 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: Network Solutions, LLC
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: MOUNT-SINAI - Mount Sinai School of Medicine, US
Got: AS11452
Domain expiry

1714 days

February 24, 2031

SSL certificate

52 days

Issued by DigiCert Inc

Domain age

30 years, 7 months

Registered February 23, 1996

DNSSEC

Not enabled

Protects against DNS spoofing

Hosting

MOUNT-SINAI - Mount Sinai School of Medicine, US

ASN AS11452

146.203.138.44

Registrar

Network Solutions, LLC

Unlocked 6 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 Network Solutions, LLC
Created February 23, 1996 (30 years, 7 months ago)
Expires February 24, 2031 (4 years, 10 months)
Last Updated December 31, 2025
Name Servers a1-223.akam.net, a11-66.akam.net, a18-67.akam.net, a4-64.akam.net, a8-65.akam.net, a9-66.akam.net
DNSSEC Not enabled
Hosting
IP Address 146.203.138.44
ASN AS11452 (MOUNT-SINAI - Mount Sinai School of Medicine, US)
Provider MOUNT-SINAI - Mount Sinai School of Medicine, US
Data source: rdap (0.4s)

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 357 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.
87 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
178 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
357 ms
Total Time Total request time from DNS lookup through full response.
357 ms

Connection waterfall

DNS Lookup 5 ms TCP Connect 87 ms TLS Handshake 178 ms Server Processing 87 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.

Send Feedback