DNS CAA Catalog
Welcome to the DNS CAA Catalog! This project monitors Certification Authority Authorization (CAA) DNS records for the top 10,000 domains as ranked by Cloudflare Radar and used under the CC BY-NC 4.0 license. The DNS records are periodically crawled and used to generate the data and statistics shown on this page. The goal is to help understand how CAA is configured and used by popular websites across the web. Select a domain from the list to explore its CAA records and gain insights into real-world CAA deployment.
CAA Statistics Summary
10000
Total Domains
1666
With CAA Records
16.7%
1532 ✅
With 'issue' Records
15.3%
554 ✳️
With 'issuewild' Record
5.5%
504 📬
With 'iodef' Records
5.0%
'issue' Record Values
'issuewild' Record Values
| Certificate Authority | Count | % |
|---|---|---|
| digicert.com | 341 | 3.4 |
| letsencrypt.org | 293 | 2.9 |
| pki.goog | 200 | 2.0 |
| comodoca.com | 170 | 1.7 |
| ssl.com | 153 | 1.5 |
| amazon.com | 124 | 1.2 |
| sectigo.com | 99 | 1.0 |
| globalsign.com | 78 | 0.8 |
| amazonaws.com | 37 | 0.4 |
| amazontrust.com | 27 | 0.3 |
| awstrust.com | 24 | 0.2 |
| godaddy.com | 23 | 0.2 |
| pki.apple.com | 23 | 0.2 |
| telesec.de | 7 | 0.1 |
| certum.pl | 6 | 0.1 |
| certainly.com | 6 | 0.1 |
| entrust.net | 5 | 0.1 |
| trust-provider.com | 4 | 0.0 |
| comodo.com | 4 | 0.0 |
| geotrust.com | 4 | 0.0 |
| microsoft.com | 4 | 0.0 |
| usertrust.com | 4 | 0.0 |
| identrust.com | 3 | 0.0 |
| www.digicert.com | 3 | 0.0 |
| rapidssl.com | 3 | 0.0 |
| quovadisglobal.com | 2 | 0.0 |
| thawte.com | 2 | 0.0 |
| cloudflare.com | 2 | 0.0 |
| swisssign.com | 2 | 0.0 |
| d-trust.net | 2 | 0.0 |
| pixfuture.com | 1 | 0.0 |
| emsign.com | 1 | 0.0 |
| jprs.jp | 1 | 0.0 |
| alphassl.com | 1 | 0.0 |
| amazonaws.cn | 1 | 0.0 |
| certum.eu | 1 | 0.0 |
| yandex.ru | 1 | 0.0 |
| secomtrust.net | 1 | 0.0 |
| akamai.net | 1 | 0.0 |
| affirmtrust.com | 1 | 0.0 |
| letsencrypt.com | 1 | 0.0 |
| certsign.ro | 1 | 0.0 |
| symantec.com | 1 | 0.0 |
| wordpress.com | 1 | 0.0 |