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~/dnsniffer/issuers/corporation-service-company·rank #45

▸ How many domains does Corporation Service Company secure?

4,766

active domains whose current TLS certificate was issued by Corporation Service Company, as of - 0.00% of all attributed domains.

# rank #45 of all CAs ▲ 2 in 30d# all records held: 4,809# subdomains: 107# intermediates: 4# United States
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~/issuers/corporation-service-company/history·active domains
4,766
domains secured by Corporation Service Company on 2026-10-15 · ▲ +2,665 (+126.84%) since 2025-06-30
1.8K2.6K3.5K4.3K5.2K2025-06-30: 2,101 active2025-07-31: 4,314 active2025-08-31: 4,317 active2025-09-30: 4,320 active2025-10-31: 4,320 active2025-11-30: 4,320 active2025-12-31: 4,392 active2026-01-31: 4,428 active2026-02-28: 4,428 active2026-03-31: 4,428 active2026-04-30: 4,519 active2026-05-31: 4,540 active2026-06-30: 4,555 active2026-07-31: 4,564 active2026-08-31: 4,566 active2026-09-01: 4,549 active2026-09-02: 4,516 active2026-09-03: 4,421 active2026-09-04: 4,368 active2026-09-05: 4,378 active2026-09-06: 4,352 active2026-09-07: 4,318 active2026-09-08: 4,207 active2026-09-09: 4,171 active2026-09-10: 4,288 active2026-09-11: 4,269 active2026-09-12: 4,392 active2026-09-13: 4,345 active2026-09-14: 4,295 active2026-09-15: 4,304 active2026-09-16: 4,340 active2026-09-17: 4,347 active2026-09-18: 4,383 active2026-09-19: 4,432 active2026-09-20: 4,400 active2026-09-21: 4,367 active2026-09-22: 4,396 active2026-09-23: 4,479 active2026-09-24: 4,720 active2026-09-25: 4,752 active2026-09-26: 4,726 active2026-09-27: 4,712 active2026-09-28: 4,669 active2026-09-29: 4,661 active2026-09-30: 4,723 active2026-10-01: 4,779 active2026-10-02: 4,789 active2026-10-03: 4,804 active2026-10-04: 4,782 active2026-10-05: 4,742 active2026-10-06: 4,772 active2026-10-07: 4,779 active2026-10-08: 4,791 active2026-10-09: 4,834 active2026-10-10: 4,837 active2026-10-11: 4,792 active2026-10-12: 4,750 active2026-10-13: 4,734 active2026-10-14: 4,727 active2026-10-15: 4,766 active2025-06-302026-10-15

# y-axis starts at 1.8K, 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
▲ +10.73%
+462 domains
90 days
▲ +4.63%
+211 domains
1 year
▲ +10.32%
+446 domains
# intermediate CAs
Intermediate certificate authorities operating under Corporation Service Company, with the number of active domains each currently secures.
intermediatecountrydomains
Corporation Service Company RSA OV SSL CA 2United States2,722
Corporation Service Company RSA DV SSL CA 2United States1,216
Corporation Service Company RSA OV SSL CAUnited States650
Trusted Secure Certificate Authority DVUnited States178
# faq
? How many domains does Corporation Service Company secure?
Corporation Service Company is the certificate authority for 4,766 active domains as of October 15, 2026 - 0.00% of every domain DNSniffer can attribute to an issuer.
? Is Corporation Service Company gaining or losing market share?
The number of domains secured by Corporation Service Company has grown by 10.32% over the last year (+446 domains).
? Which intermediate CAs does Corporation Service Company sign from?
We have seen 4 intermediates under Corporation Service Company, the busiest being “Corporation Service Company RSA OV SSL CA 2” with 2,722 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.
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