Medium Large Transport; Low Wing; 2 Turbojet Eng
Flight Crew Last 90 Days 161
Communication Breakdown; Confusion; Situational Awareness
Conflict Airborne Conflict; Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural Clearance; Ground Incursion Runway
Flight Crew Returned To Clearance
Procedure; Human Factors
As a precautionary measure I am filing this report.  I do not believe we did anything wrong or caused a violation.  I was the First Officer on Flight from DEN to ZZZ.  We pushed off Gate XXX and were told to taxi to; 'X East; call Ground 121.85.'  Ground issued taxi instructions to; 'Taxi Lima to 17L.'  So we complied.  While we were still on Taxiway Lima; I heard Ground tell the other carrier in front of us to; 'Taxi on ED; monitor Tower 132.35.'  Almost immediately after that; while still on Taxiway Lima; we were told; 'Taxi ED; follow the traffic ahead; and monitor Tower 132.35.' (Identical instructions as the traffic ahead).  I also commented to the Captain at this point; 'We were going to Runway 8 now;' because that was the frequency for Runway 8 not 17L. We continued the taxi onto ED and toward Runway 17L. As we crossed the approach end of 17R; a landing aircraft passed immediately overhead.  And; the Captain and I both commented on it. (This is a known 'Hot Spot' but we had not been issued hold short instructions.)  As I was listening to the Tower frequency; I realized this was the frequency for Runway 8 Tower not Runway 17L Tower.  At that same moment; I heard the traffic in front of us ask for 'The correct frequency for 17L.'  He was told the frequency was 133.3.  I also switched to that frequency because we were on ED in line for 17L. As we were climbing out; ATC gave us a phone number to call for a 'possible violation.'
We believed our taxi instructions were to follow a preceding aircraft to 17L.  We were given a frequency for Tower; which was the wrong frequency for 17L.  We noticed the wrong frequency as we approached 17L and changed to correct frequency.  We were cleared for takeoff and; during climb given; a number to call for possible deviation.
Pilot reports of a runway incursion that was caused by possible miscommunication and a frequency that was not issued.