[Geocoding] Nominatim silently blocking IPs?

[Frans]

Hi,

starting today, we can’t access Nominatim for reverse geocoding requests from our main server (149.47.177.199) while making the same request from elsewhere works as usual.
The IP has not been the source of heavy use and there is no 'Your IP has been blocked‘ message returned. The connection just times out.

Example request:
http://nominatim.openstreetmap.org/reverse?format=xml&lat=52.508769&lon=13.433471&zoom=18&addressdetails=1

Is our IP perhaps on a subnet being blocked?

Thanks
Frans