The domain ID indicates which ANQP server is used. All access points and SSIDs with the same number/domain ID (16-bit value) use the same ANQP server.
A client sending an ANQP request to access points / SSIDs with the same domain ID would always receive the same response. To get different responses, the client would have to look for different domain IDs.
- SNMP ID:
 - 2.71.7.9.6
 - Console path:
 - Setup > IEEE802.11u > Hotspot2.0 > Hotspot2.0-Profiles
 - Possible values:
 Max. 5 characters from [0-9]
- Default:
 - 0