`s.calendly.com`

DNSSEC	⚠️ Not signed
NS	`ns-880.awsdns-46.net` ⭐
		A	2600:9000:5303:7000::1^{🇺🇸 Amazon2600:9000:5303::/48 - CloudFront}
			PTR	`ns-880.awsdns-46.net`
		A	205.251.195.112^{🇺🇸 Amazon205.251.195.0/24 prefix}
			PTR	`ns-880.awsdns-46.net`
NS	`ns-1066.awsdns-05.org`
		A	2600:9000:5304:2a00::1^{🇺🇸 Amazon2600:9000:5304::/48 - CloudFront}
			PTR	`ns-1066.awsdns-05.org`
		A	205.251.196.42^{🇺🇸 Amazon205.251.196.0/24 prefix}
			PTR	`ns-1066.awsdns-05.org`
NS	`ns-1697.awsdns-20.co.uk`
		A	2600:9000:5306:a100::1^{🇺🇸 Amazon2600:9000:5306::/48 - CloudFront}
			PTR	`ns-1697.awsdns-20.co.uk`
		A	205.251.198.161^{🇺🇸 Amazon205.251.198.0/24 prefix}
			PTR	`ns-1697.awsdns-20.co.uk`
NS	`ns-306.awsdns-38.com`
		A	2600:9000:5301:3200::1^{🇺🇸 Amazon2600:9000:5301::/48 - CloudFront}
			PTR	`ns-306.awsdns-38.com`
		A	205.251.193.50^{🇺🇸 Amazon205.251.193.0/24 prefix}
			PTR	`ns-306.awsdns-38.com`
SOA	`ns-880.awsdns-46.net`awsdns-hostmaster@amazon.com serial=1

`calendly.com`

DNSSEC	🔒 Signed (DS record present)
A	2606:4700:4402::6812:29af^{🇺🇸 Cloudflare2606:4700:4402::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2a06:98c1:3107::ac40:9251^{🇺🇸 Cloudflare2a06:98c1:3107::/48} ✓ In HTTPS hints
A	104.18.41.175^{Cloudflare104.18.41.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.64.146.81^{🇺🇸 Cloudflare172.64.146.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`hope.ns.cloudflare.com` ⭐
NS	`roan.ns.cloudflare.com`
MX	`aspmx.l.google.com` ⭐
MX	`alt1.aspmx.l.google.com`⁽²⁰⁾
MX	`alt2.aspmx.l.google.com`⁽²⁰⁾
MX	`aspmx2.googlemail.com`⁽³⁰⁾
MX	`aspmx3.googlemail.com`⁽³⁰⁾
TXT	`06FB0F4CCD`
TXT	`MS=ms26783193`
TXT	`MS=ms75363840`
TXT	`MS=ms75932089`
TXT	`TAILSCALE-nNYYC0vC9TISAvboCaQA`
TXT	`adobe-idp-site-verification=db378e2b6b1fbb203e2fa8efb4daacdd0b5837d143bd00202...`
TXT	`apple-domain-verification=eAu2dlDrzmPvVHPg`
TXT	`atlassian-domain-verification=HeV4orUbu8ZU/Et3BdlguiFnoc5TqgI5owEFFTeBLYX6Lc6...`
TXT	`box-domain-verification=a9f4a950cfdfd3b9cea802a96528ccffbff61184fbb8363037b8c...`
TXT	`calendly-site-verification=JLJojO5SGco45xeUJrgD30rJACtPP9JsvM1TDRUSa`
TXT	`carta-domain-verification-p6kprv=Hf8pYNQgbK7i64r9SjTorb0sB`
TXT	`citrix-verification-code=ecbbb3b7-9c8c-4b46-81a7-ecd2c6ff42b9`
TXT	`cursor-domain-verification-tdtnd4=i4bl9JEOFE1VOQbkiMkpIfGQZ`
TXT	`docusign=26d57faa-4bf8-45cd-866b-a36fdf86e214`
TXT	`doit-verify295235`
TXT	`ePwEbxX6T8GLeUY2`
TXT	`facebook-domain-verification=oiiy3kxhh6i3mzo3tecoolwkzpsqos`
TXT	`google-site-verification=0W2XISvsFG0b1de6rAJqnGOZpeyHioDOc0fCPpkcga0`
TXT	`google-site-verification=4IlbzuraJEuEWHXSF1ealAXGwgl-01bcFI9b6KiPrzw`
TXT	`google-site-verification=A_dMlj5RIS-42bZbR1vzM__GBhqE_l-CNAt4kHL39K8`
TXT	`google-site-verification=CT9vkalOAxTSSlMkSYuif3PPR9IfW9wOMDYCpHV8-pQ`
TXT	`google-site-verification=D6kljg6Ozbxz7wkQHTu9bBD58dH48qXc8jbrSvdix20`
TXT	`google-site-verification=cDMxTqEGKRREjpULRkV3kxo9fUh9AAOy68UKi-sWFDA`
TXT	`google-site-verification=fnhE2QNlMBUWS8UBhCtO4N2xU1Hv5Baq_nAGRKrDOS8`
TXT	`google-site-verification=l9ghJl2k5pCmyzxgB-u7zk1WdLHRxZ8Gev7eo7j6tlw`
TXT	`google-site-verification=spiNl55E3iYMilE9lM2OB67FTeyJVzNJdYsr8YreMiE`
TXT	`google-site-verification=vvI2V5xXtswv19eoBHMvUfLriiS1W3uTeOrHdusW3AI`
TXT	`h1-domain-verification=jcUKHuDrikH5HZfj3S3op6kzWDJLgLg3d7pmxsKGupBKUPm1`
TXT	`hubspot-developer-verification=MDZjM2Q5Y2QtYjIxOS00ZTllLWIzYzEtMzI2YzYwZTQxY2My`
TXT	`jamf-site-verification=iYyCRUNw7_AXFUC7zaLiFw`
TXT	`jetbrains-domain-verification=1k4crjxnjx7wtlhja236t8jcn`
TXT	`logmein-verification-code=b644b816-e7f4-45df-8215-6ba8db765fe9`
TXT	`loom-site-verification=dfbd3882de7e42d39aa63ac12d8f403e`
TXT	`miro-verification=c546481c526d7d0fca4b0def39a0700eeb64f077`
TXT	`onetrust-domain-verification=0bf92d345265462eb0a4ad38c7b55188`
TXT	`openai-domain-verification=dv-60PIOwHK0eRDfc2VpmSJ3XY3`
TXT	`parallels-domain-verification=25c15af2f44f426fa520c0f140c5f3b884327a61390a439...`
TXT	`pardot906932=62a94517bea65a4a146e19a380714f589e54114888b639e208605e1b6b445f47`
TXT	`pardot906932=75d30f44d6d6e89f6ea5ce36bff2d547056f93c17f7034160851f23f09a2448a`
TXT	`pardot906932=d83df604fb40dd187d6c3def3b29591478a195def3dd9223df3d64f3fbabfd0c`
TXT	`pardot986361=84e628bbfec0a11d5baf3b0d9631a46a0e5f6801076cfc694ca8631fc86ee0b2`
TXT	`pendo-domain-verification=4dace321-4517-49a6-b51a-ec3478a24002`
TXT	`postman-domain-verification=987281567d45964ffbd83330939d1731ef9199ac6408ad6a6...`
TXT	`qase-ca7eb2da8082aef5bed402accf262d2bca41fd30`
TXT	`slack-domain-verification=025CLyam48F5ppYztUuMl2Ue4prf01SVmyM06BYy`
TXT	`stripe-verification=7708116a2a258908ad3dde9ebc9ab342c43b7000f582962f69a7fdcab...`
TXT	`uber-domain-verification=7898f9ad-15df-4820-b779-92b2bec7858b`
TXT	`v=spf1 include:%{i}._ip.%{h}._ehlo.%{d}._spf.vali.email include:_spf.google.c...`
TXT	`zoom-domain-verification = afd6de76-b579-11ee-a506-0242ac120002`
HTTPS	HTTP/2 ✓ hints match
		IPv4	104.18.41.175, 172.64.146.81
		IPv6	2606:4700:4402::6812:29af, 2a06:98c1:3107::ac40:9251
SOA	`hope.ns.cloudflare.com`dns@cloudflare.com serial=2400047950

WOT: SAFE (61/100)
rank #147 globally
rank #95 in the tld
this domain is "calendly"🔒 HSTS Preload (+subdomains)
WOT: SAFE (65/100)
📈 Tranco rank: #416

Calendly - Online Scheduling Platform

Calendly is a leading online appointment scheduling software that eliminates the back-and-forth of finding meeting times. Users share their Calendly link, and invitees can book available time slots directly from their calendar. The platform serves millions of users worldwide, from individual professionals to enterprise teams.

Key Features

Automated scheduling - Syncs with Google, Outlook, Office 365, and iCloud calendars
Customizable availability - Set buffer times, meeting limits, and working hours
Team scheduling - Round-robin assignments, collective meetings, and pooled availability
Integrations - Connects with Zoom, Salesforce, HubSpot, Slack, and 100+ other tools
Workflow automation - Automated reminders, follow-ups, and routing

Company Background

Founded in 2013, Calendly reached a $3 billion+ valuation by 2021. The company has expanded beyond simple scheduling into a broader platform, acquiring Prelude in 2022 to enhance recruiting capabilities. Calendly competes with scheduling features from Zoom, Google, Microsoft, and newer entrants like Supercal.

Technical Infrastructure

Type	Details
DNS	Cloudflare (hope.ns.cloudflare.com, roan.ns.cloudflare.com)
CDN/Hosting	Cloudflare
IPv4	104.18.41.175, 172.64.146.81
IPv6	2606:4700:4402::6812:29af, 2a06:98c1:3107::ac40:9251
Email	Google Workspace (aspmx.l.google.com)
DNSSEC	Signed and validated
Global Rank	#148 (Tranco #420)

Subdomains

evs.s.calendly.com

api.s.calendly.com

Same first word

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s.fyi

s.kiev.ua

s.am

s.codes

s.tt

s.media

s.com.ar

s.brother

s.sg

s.dating

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s.dp.ua

s.cx

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s.pro

s.fit

s.hm

s.co.zw

s.uk

s.com.ua

s.me

s.net.pl

s.cl

s.bike

s.com.vn

s.sv

s.de

s.vu

s.gob.cl

s.cn

s.to

s.myshopify.com

s.ki

s.gs

s.boston

s.club

s.technology

s.xz.cn

s.com.pl

s.gg

s.cg

s.st

s.cz

s.ltd

s.biz

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s.run

s.fo

s.partners

s.ua

s.pl

s.yn.cn

s.zj.cn

s.at

s.lu

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s.bo

s.kz

s.network

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s.tools

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s.au

s.ai

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s.ws

s.ro

s.digital

s.gdn

s.ee

s.ms

s.sumomo.ne.jp

s.cat

s.ht

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s.fm

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s.ly

s.coop

s.vip

s.com.cn

s.im

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s.wales

s.hr

s.tv

s.ph

s.edgesuite.net

s.blogspot.com

s.co.tt

s.bot

s.surf

s.beer

s.nu

s.viajes

s.casa

s.how

s.sh

s.gd

s.wedding

s.tw.cn

s.fr

s.wtf

s.cafe

s.kg

s.tours

s.ar

s.xj.cn

s.works

s.com.mx

s.dk

s.email

s.id

s.net.cn

s.hi.cn

s.td

s.je

s.mw

s.org.za

s.ha.cn

s.biz.vn

s.team

s.com.br

s.gp

s.sx.cn

s.zone

s.co.uk

s.net.nz

s.cool

s.is

DNS History

4 records (4 active, 0 former)

●NSns-1066.awsdns-05.org2026-02-24 → 2026-03-27 · 2 obs

● 2026-02-24 15:18:54
● 2026-03-27 02:58:46

●NSns-1697.awsdns-20.co.uk2026-02-24 → 2026-03-27 · 2 obs

● 2026-02-24 15:18:54
● 2026-03-27 02:58:46

●NSns-306.awsdns-38.com2026-02-24 → 2026-03-27 · 2 obs

● 2026-02-24 15:18:54
● 2026-03-27 02:58:46

●NSns-880.awsdns-46.net2026-02-24 → 2026-03-27 · 2 obs

● 2026-02-24 15:18:54
● 2026-03-27 02:58:46

🔍 DNS Trace

✅ Authoritative Response

Server:193.0.14.129

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 313ms | Queries: -

📄 Records

Type	Count	Sample Data

Analysis

Hierarchy

s.calendly.com is a parent of evs.s.calendly.com and api.s.calendly.com.

Name Servers

s.calendly.com is delegated to four name servers: ns-306.awsdns-38.com, ns-880.awsdns-46.net, ns-1066.awsdns-05.org and ns-1697.awsdns-20.co.uk.

s.calendly.com at least partially shares name servers with other domains, for instance yeshealth.com, chris-brown.co.uk, versatecflota.com, duno8iwwp7yec.cloudfront.net and bybcareers.com.

Host names with two IP numbers:

ns-306.awsdns-38.com points to 2600:9000:5301:3200::1 and 205.251.193.50; ns-880.awsdns-46.net points to 2600:9000:5303:7000::1 and 205.251.195.112; ns-1066.awsdns-05.org points to 2600:9000:5304:2a00::1 and 205.251.196.42; ns-1697.awsdns-20.co.uk points to 2600:9000:5306:a100::1 and 205.251.198.161.

s.calendly.com - robtex.com

s.calendly.com

calendly.com

Calendly - Online Scheduling Platform

Key Features

Company Background

Technical Infrastructure

Subdomains

Same first word

DNS History

🔍 DNS Trace

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

Analysis

Hierarchy

Name Servers

`s.calendly.com`

`calendly.com`