Small Transport; Low Wing; 2 Turboprop Eng
Flight Crew Air Transport Pilot (ATP); Flight Crew Flight Engineer; Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 90; Flight Crew Total 24000; Flight Crew Type 2100
Communication Breakdown; Confusion; Distraction; Situational Awareness; Time Pressure; Workload
ATC Issue All Types; Airspace Violation All Types; Deviation / Discrepancy - Procedural FAR; Deviation / Discrepancy - Procedural Published Material / Policy
Air Traffic Control Issued New Clearance; Flight Crew Requested ATC Assistance / Clarification
ATC Equipment / Nav Facility / Buildings; Environment - Non Weather Related; Human Factors
Enroute IFR to ZZZ1 from ZZZ2 we were advised by ZZZ Center that there was control issue at ZZZ TRACON and that we would either have to divert to alternate airport or fly VFR to destination. The weather at ZZZ1 was good so we said we could plan to go VFR into ZZZ1 and we were cleared direct destination. At approximately 35 SE of ZZZ1 at 10;000 feet ZZZ Center asked if we were VMC and we advised we would be upon reaching 9;000 feet. At 9;000 feet we advised Center we were VMC and could proceed visually to ZZZ1. At that point we were on the boundary of ZZZ Class B. I specifically asked if Center would provide flight following through Class B enroute to ZZZ1.  Center responded by saying something to the effect 'Class B airspace is down.' I assumed that ATC was saying that Class B airspace was not in effect due to ZZZ TRACON problem.We proceeded to ZZZ1 and landed without issue. I was then advised by ground control to call ZZZ Center. I called and explained what happened to man on duty. I later that day again spoke with the same individual and he advised me there was a COVID cleaning event that created the problem at TRACON. He advised me that the Controller who handled my flight was in error and did not handle the situation properly.In the event this situation ever happens again I need to make sure I work with ATC to obtain a clearance either out of or through Class B airspace. This was an unusual set of circumstances and that's when everyone involved should have a keener awareness of following proper protocol.
Air taxi Captain reported an airspace violation after having to divert from original route due to a TRACON facility going ATC Zero.