Skip to content
Gridlode
Rank #1,205Updated November 10, 2026

duolingo.com

Duolingo

duolingo.com is registered with Amazon Registrar, Inc. since January 27, 2010 (16.8 years). The registration expires on January 27, 2027. The site runs on Ruby on Rails, webpack, Amazon CloudFront and 4 other technologies. Its email security grade is B. Its SSL certificate is issued by Amazon and is valid for 183 more days.

Domain age
16.8 yrs
Technologies
7
Email security
B
SSL days left
183

Registration

RegistrarAmazon Registrar, Inc.
IANA ID468
RegisteredJanuary 27, 2010
ExpiresJanuary 27, 2027
UpdatedMay 15, 2026
Statusclient transfer prohibited
Name serversns-1020.awsdns-63.net, ns-1117.awsdns-11.org, ns-1904.awsdns-46.co.uk, ns-247.awsdns-30.com
DNSSECNot signed

DNS records

TypeValueTTL
A54.145.254.15460
A23.23.154.16760
A98.80.23.1660
A54.211.119.9960
A34.226.72.15560
A52.44.185.6960
MXaspmx.l.google.com 10300
MXalt1.aspmx.l.google.com 20300
MXalt2.aspmx.l.google.com 20300
MXaspmx2.googlemail.com 30300
MXaspmx3.googlemail.com 30300
MXaspmx4.googlemail.com 30300
MXaspmx5.googlemail.com 30300
NSns-1020.awsdns-63.net162089
NSns-1117.awsdns-11.org162089
NSns-1904.awsdns-46.co.uk162089
NSns-247.awsdns-30.com162089
TXTMS=ms665305793600
TXT_unk4dr4wfi8ewll15dm34quued295mb3600
TXT_vg2bua41v8x489g1y55hg3hr4h3qmj03600
TXTaliyun-site-verification=1acfc148-50be-45c8-a021-3c933fc8eff93600
TXTamazonses:+SIz2NZPqYri3C+PSIyKShZIbuI4rNpbLlES7lmvpu4=3600
TXTanthropic-domain-verification-z4335b=YssTBALPY7K784Sri4FjVHjd33600
TXTapple-domain-verification=bMPI889zOgALUenN3600
TXTatlassian-sending-domain-verification=423a5faf-1cfa-4704-a38a-f7adae302dd63600
TXTdocker-verification=b4ead4c5-fd66-42a5-a684-8f2e7f4c14173600
TXTe622flctk14s3cs3ccdauh8uth3600
TXTgoogle-site-verification=975UaH3lkKONB88HjWDDg34p8cdCqyTVSq_KGBAXrmU3600
TXTh1-domain-verification=sjPBeaGqQwEe8YhJ3W8JVNJa7WDQFAzc6AHkURoErkh324Yy3600

Technology stack

Build tool
webpack
CDN
Amazon CloudFront
Cookie consent
OneTrust
Programming language
Ruby
Tag manager
Google Tag Manager
Web framework
Ruby on Rails
Web server
Envoy

Analytics and advertising IDs

google_tag_manager:GTM-TX6Z97C

SSL certificate

ValidValid
IssuerUS, Amazon RSA 2048 M04, Amazon
ExpiresMay 12, 2027
Days remaining183
ProtocolTLSv1.2
Namesduolingo.com

Email security

BScore 85/100 across SPF, DMARC, DKIM, MTA-STS and BIMI.
  • warnNo MTA-STS: mail sent to you can be downgraded to an unencrypted connection.
  • warnNo TLS-RPT record, so you won't hear about failed encrypted deliveries.
  • goodSPF record found.
  • goodSPF ends with ~all: servers you have not listed are marked as suspicious (soft fail).
  • goodDMARC policy is reject: mail that fails authentication is blocked.
  • goodDMARC aggregate reports are sent to mailto:[email protected], mailto:[email protected], mailto:[email protected].
  • goodDKIM keys found (selector: google, k1, s1, s2).
  • good7 MX record(s) found. Mail is handled by Google Workspace.
  • goodBIMI record found: supporting inboxes can show your brand logo.

Homepage metadata

TitleDuolingo
DescriptionDuolingo is the world's most popular way to learn a language. It's 100% free, fun and science-based. Practice online on duolingo.com or on the apps!
Canonicalhttps://www.duolingo.com/
IndexableYes
Word count0

About duolingo.com

Who is the registrar of duolingo.com?

duolingo.com is registered with Amazon Registrar, Inc. (IANA ID 468).

When does duolingo.com expire?

The current registration of duolingo.com expires on January 27, 2027. It was first registered on January 27, 2010.

What technology does duolingo.com use?

We detected 7 technologies on duolingo.com, including webpack, Amazon CloudFront, OneTrust, Ruby, Google Tag Manager, Ruby on Rails.

Does duolingo.com protect its email with SPF and DMARC?

duolingo.com scores 85/100 (grade B) for email security. No MTA-STS: mail sent to you can be downgraded to an unencrypted connection. No TLS-RPT record, so you won't hear about failed encrypted deliveries.

What are the name servers of duolingo.com?

duolingo.com uses ns-1020.awsdns-63.net, ns-1117.awsdns-11.org, ns-1904.awsdns-46.co.uk, ns-247.awsdns-30.com.