Azure Certificate Authority details
This article provides the details of the root and subordinate Certificate Authorities (CAs) utilized by Azure. The scope includes government and national clouds. The minimum requirements for public key encryption and signature algorithms as well as links to certificate downloads and revocation lists are provided below the CA details tables.
Looking for CA details specific to Azure Active Directory? See the Certificate authorities used by Azure Active Directory article.
How to read the certificate details:
- The Serial Number (top string in the table) contains the hexadecimal value of the certificate serial number.
- The Thumbprint (bottom string in the table) is the SHA-1 thumbprint.
- Links to download the Privacy Enhanced Mail (PEM) and Distinguished Encoding Rules (DER) are the last cell in the table.
Root Certificate Authorities
| Certificate Authority | Expiry Date | Serial Number / Thumbprint |
Download |
|---|---|---|---|
| Baltimore CyberTrust Root | May 12, 2025 | 0x20000b9 D4DE20D05E66FC53FE1A50882C78DB2852CAE474 |
PEM |
| DigiCert Global Root CA | Nov 10, 2031 | 0x083be056904246b1a1756ac95991c74a A8985D3A65E5E5C4B2D7D66D40C6DD2FB19C5436 |
PEM |
| DigiCert Global Root G2 | Jan 15 2038 | 0x033af1e6a711a9a0bb2864b11d09fae5 DF3C24F9BFD666761B268073FE06D1CC8D4F82A4 |
PEM |
| DigiCert Global Root G3 | Jan 15, 2038 | 0x055556bcf25ea43535c3a40fd5ab4572 7E04DE896A3E666D00E687D33FFAD93BE83D349E |
PEM |
| Microsoft ECC Root Certificate Authority 2017 | Jul 18, 2042 | 0x66f23daf87de8bb14aea0c573101c2ec 999A64C37FF47D9FAB95F14769891460EEC4C3C5 |
PEM |
| Microsoft RSA Root Certificate Authority 2017 | Jul 18, 2042 | 0x1ed397095fd8b4b347701eaabe7f45b3 73A5E64A3BFF8316FF0EDCCC618A906E4EAE4D74 |
PEM |
Subordinate Certificate Authorities
| Certificate Authority | Expiry Date | Serial Number Thumbprint |
Downloads |
|---|---|---|---|
| DigiCert Basic RSA CN CA G2 | Mar 4, 2030 | 0x02f7e1f982bad009aff47dc95741b2f6 4D1FA5D1FB1AC3917C08E43F65015E6AEA571179 |
PEM |
| DigiCert Cloud Services CA-1 | Aug 4, 2030 | 0x019ec1c6bd3f597bb20c3338e551d877 81B68D6CD2F221F8F534E677523BB236BBA1DC56 |
PEM |
| DigiCert SHA2 Secure Server CA | Sep 22, 2030 | 0x02742eaa17ca8e21c717bb1ffcfd0ca0 626D44E704D1CEABE3BF0D53397464AC8080142C |
PEM |
| DigiCert TLS Hybrid ECC SHA384 2020 CA1 | Sep 22, 2030 | 0x0a275fe704d6eecb23d5cd5b4b1a4e04 51E39A8BDB08878C52D6186588A0FA266A69CF28 |
PEM |
| DigiCert TLS RSA SHA256 2020 CA1 | Apr 13, 2031 | 0x06d8d904d5584346f68a2fa754227ec4 1C58A3A8518E8759BF075B76B750D4F2DF264FCD |
PEM |
| GeoTrust Global TLS RSA4096 SHA256 2022 CA1 | Nov 09, 2031 | 0x0f622f6f21c2ff5d521f723a1d47d62d 7E6DB7B7584D8CF2003E0931E6CFC41A3A62D3DF |
PEM |
| GeoTrust TLS DV RSA Mixed SHA256 2020 CA-1 | May 31, 2023 | 0x0c08966535b942a9735265e4f97540bc 2F7AA2D86056A8775796F798C481A079E538E004 |
PEM |
| Microsoft Azure TLS Issuing CA 01 | Jun 27, 2024 | 0x0aafa6c5ca63c45141ea3be1f7c75317 2F2877C5D778C31E0F29C7E371DF5471BD673173 |
PEM |
| Microsoft Azure TLS Issuing CA 01 | Jun 27, 2024 | 0x1dbe9496f3db8b8de700000000001d B9ED88EB05C15C79639493016200FDAB08137AF3 |
PEM |
| Microsoft Azure TLS Issuing CA 02 | Jun 27, 2024 | 0x0c6ae97cced599838690a00a9ea53214 E7EEA674CA718E3BEFD90858E09F8372AD0AE2AA |
PEM |
| Microsoft Azure TLS Issuing CA 02 | Jun 27, 2024 | 0x330000001ec6749f058517b4d000000000001e C5FB956A0E7672E9857B402008E7CCAD031F9B08 |
PEM |
| Microsoft Azure TLS Issuing CA 05 | Jun 27, 2024 | 0x0d7bede97d8209967a52631b8bdd18bd 6C3AF02E7F269AA73AFD0EFF2A88A4A1F04ED1E5 |
PEM |
| Microsoft Azure TLS Issuing CA 05 | Jun 27, 2024 | 0x330000001f9f1fa2043bc28db900000000001f 56F1CA470BB94E274B516A330494C792C419CF87 |
PEM |
| Microsoft Azure TLS Issuing CA 06 | Jun 27, 2024 | 0x02e79171fb8021e93fe2d983834c50c0 30E01761AB97E59A06B41EF20AF6F2DE7EF4F7B0 |
PEM |
| Microsoft Azure TLS Issuing CA 06 | Jun 27, 2024 | 0x3300000020a2f1491a37fbd31f000000000020 8F1FD57F27C828D7BE29743B4D02CD7E6E5F43E6 |
PEM |
| Microsoft Azure ECC TLS Issuing CA 01 | Jun 27, 2024 | 0x09dc42a5f574ff3a389ee06d5d4de440 92503D0D74A7D3708197B6EE13082D52117A6AB0 |
PEM |
| Microsoft Azure ECC TLS Issuing CA 01 | Jun 27, 2024 | 0x330000001aa9564f44321c54b900000000001a CDA57423EC5E7192901CA1BF6169DBE48E8D1268 |
PEM |
| Microsoft Azure ECC TLS Issuing CA 02 | Jun 27, 2024 | 0x0e8dbe5ea610e6cbb569c736f6d7004b 1E981CCDDC69102A45C6693EE84389C3CF2329F1 |
PEM |
| Microsoft Azure ECC TLS Issuing CA 02 | Jun 27, 2024 | 0x330000001b498d6736ed5612c200000000001b 489FF5765030EB28342477693EB183A4DED4D2A6 |
PEM |
| Microsoft Azure ECC TLS Issuing CA 05 | Jun 27, 2024 | 0x0ce59c30fd7a83532e2d0146b332f965 C6363570AF8303CDF31C1D5AD81E19DBFE172531 |
PEM |
| Microsoft Azure ECC TLS Issuing CA 05 | Jun 27, 2024 | 0x330000001cc0d2a3cd78cf2c1000000000001c 4C15BC8D7AA5089A84F2AC4750F040D064040CD4 |
PEM |
| Microsoft Azure ECC TLS Issuing CA 06 | Jun 27, 2024 | 0x066e79cd7624c63130c77abeb6a8bb94 7365ADAEDFEA4909C1BAADBAB68719AD0C381163 |
PEM |
| Microsoft Azure ECC TLS Issuing CA 06 | Jun 27, 2024 | 0x330000001d0913c309da3f05a600000000001d DFEB65E575D03D0CC59FD60066C6D39421E65483 |
PEM |
| Microsoft RSA TLS CA 01 | Oct 8, 2024 | 0x0f14965f202069994fd5c7ac788941e2 703D7A8F0EBF55AAA59F98EAF4A206004EB2516A |
PEM |
| Microsoft RSA TLS CA 02 | Oct 8, 2024 | 0x0fa74722c53d88c80f589efb1f9d4a3a B0C2D2D13CDD56CDAA6AB6E2C04440BE4A429C75 |
PEM |
Client compatibility for public PKIs
| Windows | Firefox | iOS | macOS | Android | Java |
|---|---|---|---|---|---|
| Windows XP SP3+ | Firefox 32+ | iOS 7+ | OS X Mavericks (10.9)+ | Android SDK 5.x+ | Java JRE 1.8.0_101+ |
Public key encryption and signature algorithms
Support for the following algorithms, elliptical curves, and key sizes are required:
Signature algorithms:
- ES256
- ES384
- ES512
- RS256
- RS384
- RS512
Elliptical curves:
- P256
- P384
- P521
Key sizes:
- ECDSA 256
- ECDSA 384
- ECDSA 521
- RSA 2048
- RSA 3072
- RSA 4096
Certificate downloads and revocation lists
The following domains may need to be included in your firewall allowlists to optimize connectivity:
AIA:
cacerts.digicert.comcacerts.digicert.cncacerts.geotrust.comwww.microsoft.com
CRL:
crl.microsoft.comcrl3.digicert.comcrl4.digicert.comcrl.digicert.cncdp.geotrust.commscrl.microsoft.comwww.microsoft.com
OCSP:
ocsp.msocsp.comocsp.digicert.comocsp.digicert.cnoneocsp.microsoft.comstatus.geotrust.com
Past changes
The CA/Browser Forum updated the Baseline Requirements to require all publicly trusted Public Key Infrastructures (PKIs) to end usage of the SHA-1 hash algorithms for Online Certificate Standard Protocol (OCSP) on May 31, 2022. Microsoft updated all remaining OCSP Responders that used the SHA-1 hash algorithm to use the SHA-256 hash algorithm. View the Sunset for SHA-1 OCSP signing article for additional information.
Microsoft updated Azure services to use TLS certificates from a different set of Root Certificate Authorities (CAs) on February 15, 2021, to comply with changes set forth by the CA/Browser Forum Baseline Requirements. Some services may not finalize these updates until 2022. View the Azure TLS certificate changes article for additional information.
Next steps
To learn more about Certificate Authorities and PKI, see:
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