diff --git a/internal/repositories/coveragearea_repo.go b/internal/repositories/coveragearea_repo.go
index 1ddf70d..02674a9 100644
--- a/internal/repositories/coveragearea_repo.go
+++ b/internal/repositories/coveragearea_repo.go
@@ -8,6 +8,7 @@ import (
 )
 
 type CoverageAreaRepository interface {
+	FindCoverageByProvinceAndRegency(province, regency string) (*model.CoverageArea, error)
 	CreateCoverage(coverage *model.CoverageArea) error
 	FindCoverageById(id string) (*model.CoverageArea, error)
 	FindAllCoverage() ([]model.CoverageArea, error)
@@ -23,6 +24,18 @@ func NewCoverageAreaRepository(db *gorm.DB) CoverageAreaRepository {
 	return &coverageAreaRepository{DB: db}
 }
 
+func (r *coverageAreaRepository) FindCoverageByProvinceAndRegency(province, regency string) (*model.CoverageArea, error) {
+	var coverage model.CoverageArea
+	err := r.DB.Where("province = ? AND regency = ?", province, regency).First(&coverage).Error
+	if err != nil {
+		if err == gorm.ErrRecordNotFound {
+			return nil, nil
+		}
+		return nil, err
+	}
+	return &coverage, nil
+}
+
 func (r *coverageAreaRepository) CreateCoverage(coverage *model.CoverageArea) error {
 	if err := r.DB.Create(coverage).Error; err != nil {
 		return fmt.Errorf("failed to create coverage: %v", err)
diff --git a/internal/services/coveragearea_service.go b/internal/services/coveragearea_service.go
index f80faea..1a0f522 100644
--- a/internal/services/coveragearea_service.go
+++ b/internal/services/coveragearea_service.go
@@ -18,11 +18,12 @@ type CoverageAreaService interface {
 }
 
 type coverageAreaService struct {
-	repo repositories.CoverageAreaRepository
+	repo        repositories.CoverageAreaRepository
+	WilayahRepo repositories.WilayahIndonesiaRepository
 }
 
-func NewCoverageAreaService(repo repositories.CoverageAreaRepository) CoverageAreaService {
-	return &coverageAreaService{repo: repo}
+func NewCoverageAreaService(repo repositories.CoverageAreaRepository, WilayahRepo repositories.WilayahIndonesiaRepository) CoverageAreaService {
+	return &coverageAreaService{repo: repo, WilayahRepo: WilayahRepo}
 }
 
 func ConvertCoverageAreaToResponse(coverage *model.CoverageArea) *dto.ResponseCoverageArea {
@@ -44,9 +45,24 @@ func (s *coverageAreaService) CreateCoverageArea(request dto.RequestCoverageArea
 		return nil, fmt.Errorf("validation errors: %v", errors)
 	}
 
+	province, _, err := s.WilayahRepo.FindProvinceByID(request.Province, 0, 0)
+	if err != nil {
+		return nil, fmt.Errorf("invalid province_id")
+	}
+
+	regency, _, err := s.WilayahRepo.FindRegencyByID(request.Regency, 0, 0)
+	if err != nil {
+		return nil, fmt.Errorf("invalid regency_id")
+	}
+
+	existingCoverage, err := s.repo.FindCoverageByProvinceAndRegency(province.Name, regency.Name)
+	if err == nil && existingCoverage != nil {
+		return nil, fmt.Errorf("coverage area with province %s and regency %s already exists", province.Name, regency.Name)
+	}
+
 	coverage := model.CoverageArea{
-		Province: request.Province,
-		Regency:  request.Regency,
+		Province: province.Name,
+		Regency:  regency.Name,
 	}
 
 	if err := s.repo.CreateCoverage(&coverage); err != nil {
@@ -96,8 +112,23 @@ func (s *coverageAreaService) UpdateCoverageArea(id string, request dto.RequestC
 		return nil, fmt.Errorf("coverage area with ID %s not found: %v", id, err)
 	}
 
-	coverage.Province = request.Province
-	coverage.Regency = request.Regency
+	province, _, err := s.WilayahRepo.FindProvinceByID(request.Province, 0, 0)
+	if err != nil {
+		return nil, fmt.Errorf("invalid province_id")
+	}
+
+	regency, _, err := s.WilayahRepo.FindRegencyByID(request.Regency, 0, 0)
+	if err != nil {
+		return nil, fmt.Errorf("invalid regency_id")
+	}
+
+	existingCoverage, err := s.repo.FindCoverageByProvinceAndRegency(province.Name, regency.Name)
+	if err == nil && existingCoverage != nil {
+		return nil, fmt.Errorf("coverage area with province %s and regency %s already exists", province.Name, regency.Name)
+	}
+
+	coverage.Province = province.Name
+	coverage.Regency = regency.Name
 
 	if err := s.repo.UpdateCoverage(id, coverage); err != nil {
 		return nil, fmt.Errorf("failed to update coverage area: %v", err)
diff --git a/presentation/coveragearea_route.go b/presentation/coveragearea_route.go
index aa91c14..a1603ed 100644
--- a/presentation/coveragearea_route.go
+++ b/presentation/coveragearea_route.go
@@ -11,7 +11,8 @@ import (
 
 func CoverageAreaRouter(api fiber.Router) {
 	coverageAreaRepo := repositories.NewCoverageAreaRepository(config.DB)
-	coverageAreaService := services.NewCoverageAreaService(coverageAreaRepo)
+	wilayahRepo := repositories.NewWilayahIndonesiaRepository(config.DB)
+	coverageAreaService := services.NewCoverageAreaService(coverageAreaRepo, wilayahRepo)
 	coverageAreaHandler := handler.NewCoverageAreaHandler(coverageAreaService)
 
 	coverage := api.Group("/coveragearea")