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Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
88
GRADE
B
FIX
1
REVIEW
1
PASS
7
INFO
0
Probed from Santa Clara, United States
200 OK
Checks
9
7 PASS 1 REVIEW 1 FIX
F
IPv6 Readiness
Action
IPv6 records exist but unreachable
FIX
IPv6 records exist but unreachable
Warning::
IPv6 DNS records exist but server is not reachable
Having AAAA records but an unreachable server is worse than no AAAA — clients may experience delays before falling back to IPv4.
Got: 2606:4700:4402::6812:29af, 2a06:98c1:3107::ac40:9251
Info::
IPv6 connection error
Got: dial tcp6 [2606:4700:4402::6812:29af]:443: connect: network is unreachable
IPv6 Misconfigured
AAAA Records 2606:4700:4402::6812:29af, 2a06:98c1:3107::ac40:9251 Connection UNREACHABLE

Having AAAA records but an unreachable server is worse than no AAAA — clients may experience delays before falling back to IPv4.

Why this matters

Advertising IPv6 (AAAA records) without a reachable server means IPv6-preferring clients silently fail every connection.

Learn more ▾

Modern browsers prefer IPv6 if AAAA exists (Happy Eyeballs algorithm). If the IPv6 server isn't reachable, browsers fall back to IPv4 — but with seconds of added latency per request. Either fix IPv6 reachability or remove the AAAA records.

Source: RFC 8305 (Happy Eyeballs)

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

Certificate validity

82
days left
0d 30d 60d 90d+

Recommended actions

  • Submit your domain to hstspreload.org to be added to the Chrome preload list
  • Enable OCSP stapling on your TLS server to remove a CA roundtrip and protect user privacy
A+
DNS Records
2 A records, 20 ms lookup
PASS
2 A records, 20 ms lookup
Info::
Resolves to 2 IPv4 address(es)
Got: 172.64.146.81, 104.18.41.175
Info::
Has 2 IPv6 (AAAA) record(s)
Got: 2606:4700:4402::6812:29af, 2a06:98c1:3107::ac40:9251
Info::
2 nameserver(s) configured
Got: hope.ns.cloudflare.com, roan.ns.cloudflare.com
Info::
5 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: 20 ms
Got: 20 ms
A172.64.146.81, 104.18.41.175
AAAA2606:4700:4402::6812:29af, 2a06:98c1:3107::ac40:9251
CNAME—
NShope.ns.cloudflare.com, roan.ns.cloudflare.com
MX
10 aspmx.l.google.com
20 alt2.aspmx.l.google.com
20 alt1.aspmx.l.google.com
30 aspmx2.googlemail.com
30 aspmx3.googlemail.com
TXT
06FB0F4CCD
MS=ms26783193
MS=ms75363840
MS=ms75932089
ePwEbxX6T8GLeUY2
doit-verify295235
TAILSCALE-nNYYC0vC9TISAvboCaQA
apple-domain-verification=eAu2dlDrzmPvVHPg
docusign=26d57faa-4bf8-45cd-866b-a36fdf86e214
jamf-site-verification=iYyCRUNw7_AXFUC7zaLiFw
qase-ca7eb2da8082aef5bed402accf262d2bca41fd30
openai-domain-verification=dv-60PIOwHK0eRDfc2VpmSJ3XY3
jetbrains-domain-verification=1k4crjxnjx7wtlhja236t8jcn
loom-site-verification=dfbd3882de7e42d39aa63ac12d8f403e
carta-domain-verification-p6kprv=Hf8pYNQgbK7i64r9SjTorb0sB
miro-verification=c546481c526d7d0fca4b0def39a0700eeb64f077
cursor-domain-verification-tdtnd4=i4bl9JEOFE1VOQbkiMkpIfGQZ
facebook-domain-verification=oiiy3kxhh6i3mzo3tecoolwkzpsqos
citrix-verification-code=ecbbb3b7-9c8c-4b46-81a7-ecd2c6ff42b9
onetrust-domain-verification=0bf92d345265462eb0a4ad38c7b55188
uber-domain-verification=7898f9ad-15df-4820-b779-92b2bec7858b
logmein-verification-code=b644b816-e7f4-45df-8215-6ba8db765fe9
pendo-domain-verification=4dace321-4517-49a6-b51a-ec3478a24002
zoom-domain-verification = afd6de76-b579-11ee-a506-0242ac120002
slack-domain-verification=025CLyam48F5ppYztUuMl2Ue4prf01SVmyM06BYy
calendly-site-verification=JLJojO5SGco45xeUJrgD30rJACtPP9JsvM1TDRUSa
google-site-verification=0W2XISvsFG0b1de6rAJqnGOZpeyHioDOc0fCPpkcga0
google-site-verification=4IlbzuraJEuEWHXSF1ealAXGwgl-01bcFI9b6KiPrzw
google-site-verification=A_dMlj5RIS-42bZbR1vzM__GBhqE_l-CNAt4kHL39K8
google-site-verification=CT9vkalOAxTSSlMkSYuif3PPR9IfW9wOMDYCpHV8-pQ
google-site-verification=D6kljg6Ozbxz7wkQHTu9bBD58dH48qXc8jbrSvdix20
google-site-verification=cDMxTqEGKRREjpULRkV3kxo9fUh9AAOy68UKi-sWFDA
google-site-verification=fnhE2QNlMBUWS8UBhCtO4N2xU1Hv5Baq_nAGRKrDOS8
google-site-verification=l9ghJl2k5pCmyzxgB-u7zk1WdLHRxZ8Gev7eo7j6tlw
google-site-verification=spiNl55E3iYMilE9lM2OB67FTeyJVzNJdYsr8YreMiE
google-site-verification=vvI2V5xXtswv19eoBHMvUfLriiS1W3uTeOrHdusW3AI
h1-domain-verification=jcUKHuDrikH5HZfj3S3op6kzWDJLgLg3d7pmxsKGupBKUPm1
pardot906932=62a94517bea65a4a146e19a380714f589e54114888b639e208605e1b6b445f47
pardot906932=75d30f44d6d6e89f6ea5ce36bff2d547056f93c17f7034160851f23f09a2448a
pardot906932=d83df604fb40dd187d6c3def3b29591478a195def3dd9223df3d64f3fbabfd0c
pardot986361=84e628bbfec0a11d5baf3b0d9631a46a0e5f6801076cfc694ca8631fc86ee0b2
hubspot-developer-verification=MDZjM2Q5Y2QtYjIxOS00ZTllLWIzYzEtMzI2YzYwZTQxY2My
stripe-verification=7708116a2a258908ad3dde9ebc9ab342c43b7000f582962f69a7fdcab307...
box-domain-verification=a9f4a950cfdfd3b9cea802a96528ccffbff61184fbb8363037b8cb9e...
adobe-idp-site-verification=db378e2b6b1fbb203e2fa8efb4daacdd0b5837d143bd0020257d...
atlassian-domain-verification=HeV4orUbu8ZU/Et3BdlguiFnoc5TqgI5owEFFTeBLYX6Lc6BZK...
parallels-domain-verification=25c15af2f44f426fa520c0f140c5f3b884327a61390a439495...
SPF v=spf1 include:%{i}._ip.%{h}._ehlo.%{d}._spf.vali.email include:_spf.google.com ...
postman-domain-verification=987281567d45964ffbd83330939d1731ef9199ac6408ad6a641d...
CAALookup not available with standard resolver
Resolved in 20 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+
Redirect Chain
No redirects — direct access
PASS
No redirects — direct access
Info::
No redirects — direct access
Got: https://calendly.com

https://calendly.com

384 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://calendly.com200384 msHTTP/1.1cloudflare
A+
Crawlability
robots.txt present, sitemap with 985 URLs
PASS
robots.txt present, sitemap with 985 URLs
Info::
robots.txt is present
Got: 336 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 985 entries
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 336 B Sitemaps referenced 1 User-agents *, ia_archiver, CCBot Blocking No — crawling allowed
User-Agent: *
Allow: /llms.txt
Allow: /pricing
Disallow: /abuse_reports/new
Disallow: /*?*
Disallow: /app/

User-Agent: ia_archiver
Allow: /$
Allow: /llms.txt
Allow: /pricing
Disallow: /

User-Agent: CCBot
Allow: /llms.txt
Allow: /pricing
Disallow: /

Host: https://calendly.com
Sitemap: https://calendly.com/marketing-site/sitemap.xml
sitemap.xml 200 OK
Type URL Set URLs 985 entries Valid XML Yes
Sample URLs:
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.calendly.com/
200https://calendly.com/

Preferred variant: non-www

HTTP → HTTPS

301http://calendly.com/ → https://calendly.com/

Consistent

A+
Domain Intelligence
calendly.com — via GoDaddy.com, LLC, 13 years, 3 months old, hosted on Cloudflare
PASS
calendly.com — via GoDaddy.com, LLC, 13 years, 3 months old, hosted on Cloudflare
Info::
Domain registered until Feb 26, 2027 (10 months remaining)
Info::
DNSSEC is enabled
Info::
Registrar: GoDaddy.com, 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: Cloudflare
Got: AS13335
Domain expiry

256 days

February 26, 2027

SSL certificate

82 days

Issued by Google Trust Services

Domain age

13 years, 3 months

Registered February 26, 2013

DNSSEC

Enabled

Protects against DNS spoofing

Hosting

Cloudflare

ASN AS13335

172.64.146.81

Registrar

GoDaddy.com, LLC

Unlocked 2 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 GoDaddy.com, LLC
Created February 26, 2013 (13 years, 3 months ago)
Expires February 26, 2027 (10 months)
Last Updated September 13, 2022
Name Servers hope.ns.cloudflare.com, roan.ns.cloudflare.com
DNSSEC Enabled
Hosting
IP Address 172.64.146.81
ASN AS13335 (CLOUDFLARENET - Cloudflare, Inc., US)
Provider Cloudflare
Data source: rdap (0.1s)

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 224 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
4 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
3 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
8 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
174 ms
Total Time Total request time from DNS lookup through full response.
224 ms

Connection waterfall

DNS Lookup 4 ms TCP Connect 3 ms TLS Handshake 8 ms Server Processing 158 ms Content Transfer 50 ms
A
CDN & Delivery
Cloudflare (DYNAMIC)
PASS
Cloudflare (DYNAMIC)
Info::
Site is served via Cloudflare CDN (edge: SJC)
Got: cf-ray: 9ed4e8b22a406e82-SJC
Info::
CDN cache status: DYNAMIC
CDN Detected: Cloudflare
Provider Cloudflare Cache Status DYNAMIC Evidence cf-ray: 9ed4e8b22a406e82-SJC
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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