# GTS Root R4 root certificate (Google Trust Services, SHA-256 71CCA539)

> GTS Root R4 is a root CA certificate operated by Google Trust Services (ECDSA P-384, valid until 2036-06-22, SHA-256 71CCA539). As of the latest CCADB data it is trusted for TLS server authentication by 1 of 4 major root stores: Microsoft.

Source: https://ssl.sh/roots/google-trust-services-gts-root-r4-71cca539/
Last updated: 2026-11-10

GTS Root R4 is a root CA certificate operated by Google Trust Services (ECDSA P-384, valid until 2036-06-22, SHA-256 71CCA539). As of the latest CCADB data it is trusted for TLS server authentication by 1 of 4 major root stores: Microsoft.

| Field | Value |
|---|---|
| CA owner | Google Trust Services |
| Subject | CN=GTS Root R4,O=Google Trust Services LLC,C=US |
| SHA-256 | 71CCA5391F9E794B04802530B363E121DA8A3043BB26662FEA4DCA7FC951A4BD |
| SPKI SHA-256 | 9847E5653E5E9E847516E5CB818606AA7544A19BE67FD7366D506988E8D84347 |
| Valid from | 2016-06-22 |
| Expires | 2036-06-22 |
| Key | ECDSA P-384 |
| Signature algorithm | ecdsa-with-SHA384 |
| Serial number | 6E47A9C88B94B6E8BB3B2AD8A2B2C199 |
| SHA-1 (Windows thumbprint) | 2A1D6027D94AB10A1C4D915CCD33A0CB3E2D54CB |

## Root store status

| Root store | Status | Trusted for TLS | Distrust for TLS after | Details |
|---|---|---|---|---|
| Chrome | Not included | No | - | - |
| Mozilla | Removed | No | - | - |
| Apple | Removed | No | - | - |
| Microsoft | Included | Yes | - | Trusted EKUs: Server Authentication, Client Authentication, Secure Email, Time Stamping |

The CCADB lists no EV policy OID for GTS Root R4.

## Intermediate CAs issued by this root

The CCADB lists no intermediate CA certificate signed directly by GTS Root R4.


## Cross-signed versions

1 certificate(s) in the CCADB have the same subject and public key as GTS Root R4 but a different issuer. A server can send one of them so that clients which trust the issuing root, but not GTS Root R4, can still build a chain.

| Signed by | CA owner | Expires | Status | SHA-256 |
|---|---|---|---|---|
| GlobalSign Root CA | GlobalSign nv-sa | 2028-01-28 | Valid | 76B27B80A58027DC3CF1DA68DAC17010ED93997D0B603E2FADBE85012493B5A7 |

## What happens when it expires

GTS Root R4 is valid until 2036-06-22, about 9.6 years after this data snapshot (2026-11-10). From that day, browsers and operating systems that check trust-anchor expiry stop accepting chains that end at this root, so any certificate that can only chain to it fails validation. Android is a known exception: it does not enforce the expiry date of trust anchors.

## FAQ

**Is GTS Root R4 trusted by Chrome, Firefox, Safari and Windows?**

As of 2026-11-10, Microsoft trust it for TLS server authentication; Chrome, Mozilla, Apple do not.

**When does GTS Root R4 expire?**

On 2036-06-22, about 9.6 years after the 2026-11-10 data snapshot.

**How many intermediate certificates has GTS Root R4 issued?**

The CCADB lists no intermediate certificate signed directly by GTS Root R4.

**Is GTS Root R4 cross-signed?**

Yes. The CCADB has 1 cross-certificate(s) with its subject and key, signed by GlobalSign Root CA; 1 of them are still valid.

Sources: CCADB TLS Server Authentication report, All Included Root Certificate Trust Bit Settings, All Certificate Information (V5), the per-store TLS reports and Mozilla's Included CA Certificate Report (ccadb.org/resources).