B767 captain reported landing at an airport not authorized in company ops specs.

Attributes
ACN	1605130
Time
Date	201812
Local Time Of Day	0001-0600
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Dawn
Aircraft 1
Make Model Name	B767-300 and 300 ER
Operating Under FAR Part	Part 121
Flight Plan	IFR
Person 1
Function	Pilot Flying Captain
Qualification	Flight Crew Multiengine Flight Crew Instrument Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 75 Flight Crew Total 9750 Flight Crew Type 2500
Events
Anomaly	Deviation - Procedural Published Material / Policy Deviation - Procedural FAR

Narrative:

As part of my regular work schedule I flew a B767 from ZZZ1 to ZZZ and returned to ZZZ1. I later discovered that [company] was not authorized to use ZZZ as a regular airport for a B767. It appears that this does not comply with 14 crash fire rescue equipment 121.555.

Original NASA ASRS Text

Title: B767 Captain reported landing at an airport not authorized in company Ops Specs.

Narrative: As part of my regular work schedule I flew a B767 from ZZZ1 to ZZZ and returned to ZZZ1. I later discovered that [company] was not authorized to use ZZZ as a regular airport for a B767. It appears that this does not comply with 14 CFR 121.555.

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.