B767 first officer reported landing at an airpor not authorized in company ops specs.

Attributes
ACN	1605120
Time
Date	201812
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Make Model Name	B767-300 and 300 ER
Operating Under FAR Part	Part 121
Route In Use	None
Flight Plan	IFR
Person 1
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument
Experience	Flight Crew Last 90 Days 100 Flight Crew Total 12000 Flight Crew Type 200
Events
Anomaly	Deviation - Procedural FAR Deviation - Procedural Published Material / Policy

Narrative:

I was the first officer on aircraft X inbound to ZZZ [and outbound from it] in violation of [company] ops spec and 14CFR 121.55. We were operating a 767 into and out of ZZZ for these flights. For the B767; ZZZ authorization was for use as an alternate only. It is very difficult to be aware of every airfield in [ops specs] and its designation in regards to each fleet type. [Another aircraft we use] is used frequently to service ZZZ. There was never a concern that the B767 was not authorized. A trip in our published bid packet is assumed to be ops specs compliant. Therefore; I operated the flight inbound and outbound in violation. I was in error to make that assumption.

Original NASA ASRS Text

Title: B767 First Officer reported landing at an airpor not authorized in company Ops Specs.

Narrative: I was the First Officer on Aircraft X inbound to ZZZ [and outbound from it] in violation of [Company] Ops Spec and 14CFR 121.55. We were operating a 767 into and out of ZZZ for these flights. For the B767; ZZZ authorization was for use as an Alternate only. It is very difficult to be aware of every airfield in [Ops Specs] and its designation in regards to each fleet type. [Another aircraft we use] is used frequently to service ZZZ. There was never a concern that the B767 was not authorized. A trip in our published bid packet is assumed to be Ops Specs compliant. Therefore; I operated the flight inbound and outbound in violation. I was in error to make that assumption.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.