~/dnsniffer/issuers/deutsche-telekom-security·rank #82
▸ How many domains does Deutsche Telekom Security secure?
1,440
active domains whose current TLS certificate was issued by Deutsche Telekom Security, as of - 0.00% of all attributed domains.
# rank #82 of all CAs ▼ 1 in 30d# all records held: 1,448# subdomains: 799# intermediates: 12# Germany
~/issuers/deutsche-telekom-security/history·active domains
1,440
domains secured by Deutsche Telekom Security on 2026-10-14 · ▲ +750 (+108.70%) since 2025-06-30
# y-axis starts at 598.8, not zero - domain counts move by fractions of a percent a day. Dashed segments are estimated: reconstructed from certificate first-seen dates before daily snapshots began, not measured on the day.
# change over time
30 days
▲ +7.14%
+96 domains
90 days
▲ +6.67%
+90 domains
1 year
▲ +13.83%
+175 domains
# intermediate CAs
| intermediate | country | domains |
|---|---|---|
| Telekom Security OV RSA CA 26A | Germany | 604 |
| Telekom Security ServerID OV Class 2 CA | Germany | 478 |
| Telekom Security DV RSA CA 24 | Germany | 122 |
| Telekom Security OV RSA CA 26B | Germany | 120 |
| TeleSec Business TLS-CA 2022 | Germany | 55 |
| Telekom Security OV RSA CA 24 | Germany | 54 |
| Telekom Security ServerID EV Class 3 CA | Germany | 3 |
| Telekom Security DV RSA CA 22 | Germany | 3 |
| Telekom Security OV RSA CA 22 | Germany | 1 |
| Telekom Security OV qualified CA 25 | Germany | 0 |
| Telekom Security OV RSA qualified CA 25 | Germany | 0 |
| Telekom Security EV RSA CA 23 | Germany | 0 |
# faq
- ? How many domains does Deutsche Telekom Security secure?
- Deutsche Telekom Security is the certificate authority for 1,440 active domains as of October 14, 2026 - 0.00% of every domain DNSniffer can attribute to an issuer.
- ? Is Deutsche Telekom Security gaining or losing market share?
- The number of domains secured by Deutsche Telekom Security has grown by 13.83% over the last year (+175 domains).
- ? Which intermediate CAs does Deutsche Telekom Security sign from?
- We have seen 12 intermediates under Deutsche Telekom Security, the busiest being “Telekom Security OV RSA CA 26A” with 604 domains. The full list, with per-intermediate counts, is on this page.
- ? Where does this number come from?
- DNSniffer ingests Certificate Transparency logs continuously and records the issuer of the most recent certificate seen for each domain, then snapshots the per-issuer count once a day. It measures how much of the live web a CA currently secures, not how many certificates it has issued over its lifetime.