"N2EY" wrote

There was an ARRL HQ station before W1AW. What was its callsign?

----- W1MK


There's a second callsign for the ARRL lab. What is/was it?

----- W1INF


More trivia: There is an IARU HQ call sign. What is it? While it may
have a certain familiarity about it, especially the suffix, what is the
significance of the prefix?

73, de Hans, K0HB