Seems like quite a bit of airspace is open.
From CFMU
AIRSPACE OPEN:
Please contact the FMP concerned for more information.
-Maastricht UAC
-Karlsruhe (ALLED..ACC)
-France above FL355
NOTAM 1457+58+59/10
-Roumania above FL355
NOTAM -Swiss above FL195 except for Y + Z flt's
NOTAM 0187+88/10
-LOWW Austria except the see above
The next general teleconference to review the latest VACC ash cloud forecast will be held at 18-0800 UTC.
(number of available lines = 400)