SSL Certificates

infoIf you manually store our SSL or Intermediate SSL certificates in a trust store, any future certificate changes will be communicated in advance via a scheduled maintenance post on our status page. We recommend subscribing to our status page to ensure you receive these notifications.

Intermediate CA Certificate

If at all possible we recommend you save the Intermediate CA certificate in your trust store rather than the certificate for the endpoint itself.

The CURRENT Intermediate CA certificate (made active on 2026-02-27) is as follows (in PEM format):

-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Additional certificate info:

  • Serial Number: 0c:f5:bd:06:2b:56:02:f4:7a:b8:50:2c:23:cc:f0:66
  • Validity:
    • Not Before: Mar 30 00:00:00 2021 GMT
    • Not After: Mar 29 23:59:59 2031 GMT

Leaf SSL Certificate

warningPinning against the leaf certificate is not recommended. Leaf certificates can change during renewal, reissue, or service migration. Prefer the Intermediate CA certificate above where your application requires a custom trust store.

The CURRENT SSL certificate for *.sms.optus.com.au (made active on 2026-02-27) is as follows (in PEM format):

-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Additional certificate info:

  • Serial Number: 0b:46:ad:6a:f5:93:85:aa:7e:8d:ec:a4:15:93:48:5d
  • Validity:
    • Not Before: Feb 26 00:00:00 2026 GMT
    • Not After: Sep 12 23:59:59 2026 GMT