keys.openpgp.org

We found an entry for siebing@digitalelehre.org.

https://keys.openpgp.org/vks/v1/by-fingerprint/0ABB6D15379D6FEC38B8F6C5BFFF0BB4990666B5

Hint: It's more convenient to use keys.openpgp.org from your OpenPGP software.
Take a look at our usage guide for details.