# GTS Root R3 root certificate (Google Trust Services, SHA-256 15D5B877)

> GTS Root R3 is a root CA certificate operated by Google Trust Services (ECDSA P-384, valid until 2036-06-22, SHA-256 15D5B877). 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-r3-15d5b877/
Last updated: 2026-11-10

GTS Root R3 is a root CA certificate operated by Google Trust Services (ECDSA P-384, valid until 2036-06-22, SHA-256 15D5B877). 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 R3,O=Google Trust Services LLC,C=US |
| SHA-256 | 15D5B8774619EA7D54CE1CA6D0B0C403E037A917F131E8A04E1E6B7A71BABCE5 |
| SPKI SHA-256 | 4179EDD981EF747477B49626408AF43DAA2CA7AB7F9E082C1060F84096774348 |
| Valid from | 2016-06-22 |
| Expires | 2036-06-22 |
| Key | ECDSA P-384 |
| Signature algorithm | ecdsa-with-SHA384 |
| Serial number | 6E47A9C76CA9732440890F0355DD8D1D |
| SHA-1 (Windows thumbprint) | 30D4246F07FFDB91898A0BE9496611EB8C5E46E5 |

## 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 R3.

## Intermediate CAs issued by this root

The CCADB lists no intermediate CA certificate signed directly by GTS Root R3.


## Cross-signed versions

No certificate in the CCADB has the same subject and public key as GTS Root R3 with a different issuer, so a client has to carry GTS Root R3 itself in its root store to trust it.


## What happens when it expires

GTS Root R3 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 R3 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 R3 expire?**

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

**How many intermediate certificates has GTS Root R3 issued?**

The CCADB lists no intermediate certificate signed directly by GTS Root R3.

**Is GTS Root R3 cross-signed?**

No. The CCADB has no certificate with the same subject and public key signed by another CA.

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).