Widebody; Low Wing; 2 Turbojet Eng
Flight Crew Instrument; Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP)
Situational Awareness; Communication Breakdown
Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy; Ground Incursion Taxiway
General None Reported / Taken
Company Policy; Human Factors
Upon landing Runway XXL Ground said cross Runway XXR via [taxiway] join [other taxiway] to [intersection]. Ground Controller asked if we were going into Gate YY and we replied 'Yes.' Airport was completely quiet; no other aircraft taxiing and assumed cleared all the way to gate. Turned into intersection and saw guide in and continued to uneventful parking. After shutdown we were advised to call operations. We called and were told we needed to call Ramp Tower as they were still open and operating.
Neglected to call Ramp Tower after landing and during taxi to the gate. In past XXXX-ZZZ legs; the aircraft type would be parked on the end of the concourse at a gate that doesn't require a call to Ramp. With the gate assignment being YY; I neglected to notice that a call to Ramp would be necessary.Contributing to the mistake; we were cleared to the ramp entrance by Tower as we were clearing XXL and that further contributed to me thinking we were good all of the way to the gate. It was very late relative to my home time zone; so I was tired. This was also my first flight in the FO seat in almost two months due to COVID-19 concerns.
Air carrier flight crew reported not calling Ramp before taxiing.