How can classified establishments be searched?

1. Basic Search:
You can search classified establishments using:
- Certificate number
- Engineering license number
- Contractor/Engineering office name
- Unified National Number

2. Advanced Search:
If none of the above are available, you can search using:
- Classification type (mandatory dropdown)
- Classification field (mandatory dropdown)
- City (mandatory dropdown)
You can narrow down the results further by adding:
- Establishment activity
- Certificate grade
- Certificate expiry date
- Establishment phone number
- Service