# Certainly Root E1 root certificate (Certainly LLC)

> Certainly Root E1 is a root CA certificate operated by Certainly LLC (ECDSA P-384, valid until 2046-04-01, SHA-256 B4585F22). As of the latest CCADB data it is trusted for TLS server authentication by 3 of 4 major root stores: Chrome, Mozilla, Apple.

Source: https://ssl.sh/roots/certainly-root-e1/
Last updated: 2026-11-10

Certainly Root E1 is a root CA certificate operated by Certainly LLC (ECDSA P-384, valid until 2046-04-01, SHA-256 B4585F22). As of the latest CCADB data it is trusted for TLS server authentication by 3 of 4 major root stores: Chrome, Mozilla, Apple.

| Field | Value |
|---|---|
| CA owner | Certainly LLC |
| Subject | CN=Certainly Root E1,O=Certainly,C=US |
| SHA-256 | B4585F22E4AC756A4E8612A1361C5D9D031A93FD84FEBB778FA3068B0FC42DC2 |
| SPKI SHA-256 | 1EF64625DAA2E5D433D7449AE31A200D1025E0012A8FECFA70932F8B599B75DD |
| Valid from | 2021-04-01 |
| Expires | 2046-04-01 |
| Key | ECDSA P-384 |
| Signature algorithm | ecdsa-with-SHA384 |
| Serial number | 62533B1470333275CF98D9AB9BFCCF8 |
| SHA-1 (Windows thumbprint) | F9E16DDC0189CFD58245633EC5377DC2EB936F2B |

## Root store status

| Root store | Status | Trusted for TLS | Distrust for TLS after | Details |
|---|---|---|---|---|
| Chrome | Included | Yes | - | - |
| Mozilla | Included | Yes | - | Trust bits: Websites; EV policy OIDs: not EV-enabled; First included in: NSS 3.80 / Firefox 103; Inclusion bug: #1727941 |
| Apple | Included | Yes | - | Trust bits: serverAuth, clientAuth |
| Microsoft | Not included | No | - | - |

The CCADB lists no EV policy OID for Certainly Root E1.

## Intermediate CAs issued by this root

The CCADB lists 1 intermediate CA certificates signed directly by Certainly Root E1: 1 currently valid, 0 expired and 0 revoked (revoked includes those whose parent was revoked).

| Intermediate | Operated by | Expires | Status | SHA-256 |
|---|---|---|---|---|
| Certainly Intermediate E1 | Certainly LLC | 2031-04-01 | Valid | 98DD2A75F65748F2667BC4B079177813647C17EDCC6DEE92F1F06668BE0F1A3D |

## Cross-signed versions

No certificate in the CCADB has the same subject and public key as Certainly Root E1 with a different issuer, so a client has to carry Certainly Root E1 itself in its root store to trust it.


## What happens when it expires

Certainly Root E1 is valid until 2046-04-01, about 19.4 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 Certainly Root E1 trusted by Chrome, Firefox, Safari and Windows?**

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

**When does Certainly Root E1 expire?**

On 2046-04-01, about 19.4 years after the 2026-11-10 data snapshot.

**How many intermediate certificates has Certainly Root E1 issued?**

The CCADB lists 1: 1 valid, 0 expired and 0 revoked. The newest valid one is Certainly Intermediate E1, valid until 2031-04-01.

**Is Certainly Root E1 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).