# GTS Root R1 root certificate (Google Trust Services, SHA-256 2A575471)

> GTS Root R1 is a root CA certificate operated by Google Trust Services (RSA 4096, valid until 2036-06-22, SHA-256 2A575471). 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-r1-2a575471/
Last updated: 2026-11-10

GTS Root R1 is a root CA certificate operated by Google Trust Services (RSA 4096, valid until 2036-06-22, SHA-256 2A575471). 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 R1,O=Google Trust Services LLC,C=US |
| SHA-256 | 2A575471E31340BC21581CBD2CF13E158463203ECE94BCF9D3CC196BF09A5472 |
| SPKI SHA-256 | 871A9194F4EED5B312FF40C84C1D524AED2F778BBFF25F138CF81F680A7ADC67 |
| Valid from | 2016-06-22 |
| Expires | 2036-06-22 |
| Key | RSA 4096 |
| Signature algorithm | sha384WithRSAEncryption |
| Serial number | 6E47A9C54B470C0DEC33D089B91CF4E1 |
| SHA-1 (Windows thumbprint) | E1C950E6EF22F84C5645728B922060D7D5A7A3E8 |

## 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 R1.

## Intermediate CAs issued by this root

The CCADB lists no intermediate CA certificate signed directly by GTS Root R1.


## Cross-signed versions

1 certificate(s) in the CCADB have the same subject and public key as GTS Root R1 but a different issuer. A server can send one of them so that clients which trust the issuing root, but not GTS Root R1, can still build a chain.

| Signed by | CA owner | Expires | Status | SHA-256 |
|---|---|---|---|---|
| GlobalSign Root CA | GlobalSign nv-sa | 2028-01-28 | Valid | 3EE0278DF71FA3C125C4CD487F01D774694E6FC57E0CD94C24EFD769133918E5 |

## What happens when it expires

GTS Root R1 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 R1 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 R1 expire?**

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

**How many intermediate certificates has GTS Root R1 issued?**

The CCADB lists no intermediate certificate signed directly by GTS Root R1.

**Is GTS Root R1 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).