I can't quite remember when we Germans transitioned from "Klammeraffe" (lit. "spider monkey") to "at" when spelling out email addresses...
# in internet-contexts has transitioned to "hashtag" (remains "firkant" in voice response), but as far as I know snabel-a is still in use (I just realised that I haven't participated in a Danish verbal transmission of an email address in quite a while).
In Swedish you can hear "snabel-A" (trunk-A, same as in Danish) or "at".
Nowadays it's usually called "ät-merkki" as in "at-sign" as "at" is spelled in Finnish.
In Poland it is still called Małpa, which means monkey.
Klammer is short for Büroklammer (= paper clip) and Affe is monkey (or ape).