I found this the other day from the memoirs of Colonel Thomas Gowenlock - Intelligence Officer United States 1st Division November 1918. During WW2 he was a Major General in Intelligence.
"OFFICIAL RADIO from Paris - 6:01 AM Nov 11 1918.
Marshal Foch to Commander-in-Chief
1. Hostilities will be stopped on the entire front beginning at 11 o'clock, November 11th (French hour).
2. The Allied troops will not go beyond the line reached at that hour on that date until further orders.
[signed]
Marshal Foch
5:45 AM
Note that the Armistice came into effect in France at 11 AM - which would have been 10 AM GMT.