diff --git a/cmd/main-migration/migrations/20251009042854.sql b/cmd/main-migration/migrations/20251009042854.sql
new file mode 100644
index 00000000..c8b5ec23
--- /dev/null
+++ b/cmd/main-migration/migrations/20251009042854.sql
@@ -0,0 +1,9 @@
+-- Create "PostalCode" table
+CREATE TABLE "public"."PostalCode" (
+  "Id" bigserial NOT NULL,
+  "Code" character varying(5) NULL,
+  "Village_Code" character varying(10) NULL,
+  PRIMARY KEY ("Id"),
+  CONSTRAINT "uni_PostalCode_Code" UNIQUE ("Code"),
+  CONSTRAINT "fk_Village_PostalCodes" FOREIGN KEY ("Village_Code") REFERENCES "public"."Village" ("Code") ON UPDATE NO ACTION ON DELETE NO ACTION
+);
diff --git a/cmd/main-migration/migrations/20251009052657.sql b/cmd/main-migration/migrations/20251009052657.sql
new file mode 100644
index 00000000..5655a577
--- /dev/null
+++ b/cmd/main-migration/migrations/20251009052657.sql
@@ -0,0 +1,8 @@
+-- Modify "Regency" table
+ALTER TABLE "public"."Regency" DROP CONSTRAINT "fk_Province_Regencies", ALTER COLUMN "Id" TYPE bigint, ADD CONSTRAINT "fk_Regency_Province" FOREIGN KEY ("Province_Code") REFERENCES "public"."Province" ("Code") ON UPDATE NO ACTION ON DELETE NO ACTION;
+-- Modify "District" table
+ALTER TABLE "public"."District" DROP CONSTRAINT "fk_Regency_Districts", ADD CONSTRAINT "fk_District_Regency" FOREIGN KEY ("Regency_Code") REFERENCES "public"."Regency" ("Code") ON UPDATE NO ACTION ON DELETE NO ACTION;
+-- Modify "Village" table
+ALTER TABLE "public"."Village" DROP CONSTRAINT "fk_District_Villages", ADD CONSTRAINT "fk_Village_District" FOREIGN KEY ("District_Code") REFERENCES "public"."District" ("Code") ON UPDATE NO ACTION ON DELETE NO ACTION;
+-- Modify "PostalCode" table
+ALTER TABLE "public"."PostalCode" DROP CONSTRAINT "fk_Village_PostalCodes", ADD CONSTRAINT "fk_PostalCode_Village" FOREIGN KEY ("Village_Code") REFERENCES "public"."Village" ("Code") ON UPDATE NO ACTION ON DELETE NO ACTION;
diff --git a/cmd/main-migration/migrations/atlas.sum b/cmd/main-migration/migrations/atlas.sum
index 5ef938c0..e06784b3 100644
--- a/cmd/main-migration/migrations/atlas.sum
+++ b/cmd/main-migration/migrations/atlas.sum
@@ -1,4 +1,4 @@
-h1:8cWwLjbT/RIIeLTxM5t9O3pCbmZZFVud4a6PrqIPqT8=
+h1:TrdoKKXrICvDA283WGDf33WtWHglk1twvjDpYrNwc8o=
 20250904105930.sql h1:MEM6blCgke9DzWQSTnLzasbPIrcHssNNrJqZpSkEo6k=
 20250904141448.sql h1:J8cmYNk4ZrG9fhfbi2Z1IWz7YkfvhFqTzrLFo58BPY0=
 20250908062237.sql h1:Pu23yEW/aKkwozHoOuROvHS/GK4ngARJGdO7FB7HZuI=
@@ -32,3 +32,5 @@ h1:8cWwLjbT/RIIeLTxM5t9O3pCbmZZFVud4a6PrqIPqT8=
 20251008031554.sql h1:AqrVfIhSzY3PCy8ZlP5W91wn2iznfIuj5qQfubp6/94=
 20251008052346.sql h1:nxnXmooIJ6r1mmzwnw+6efxLfc/k9h2aE6RMptPRons=
 20251008073620.sql h1:6YsJp1W4SmQJ1lxpqF27BBlDC1zqhw7Yhc7pLzQTY6M=
+20251009042854.sql h1:vK7bDqUDTxjHMSh1wrQiKITeqbB/7aqkWaPut8nGA68=
+20251009052657.sql h1:I0rBPBg1o6zuRaxqWqCh82rI+NN7Gr6C//8ItUaLmtY=
diff --git a/internal/domain/main-entities/district/base/entity.go b/internal/domain/main-entities/district/base/entity.go
new file mode 100644
index 00000000..c7429490
--- /dev/null
+++ b/internal/domain/main-entities/district/base/entity.go
@@ -0,0 +1,8 @@
+package base
+
+type Basic struct {
+	Id           uint32 `json:"id" gorm:"primaryKey"`
+	Regency_Code string `json:"regency_code" gorm:"size:4"`
+	Code         string `json:"code" gorm:"unique;size:6"` // NOTE: THE PROPER SIZE IS 6
+	Name         string `json:"name" gorm:"size:50"`
+}
diff --git a/internal/domain/main-entities/district/dto.go b/internal/domain/main-entities/district/dto.go
index f126867d..1f3c4494 100644
--- a/internal/domain/main-entities/district/dto.go
+++ b/internal/domain/main-entities/district/dto.go
@@ -2,7 +2,9 @@ package district
 
 import (
 	ecore "simrs-vx/internal/domain/base-entities/core"
-	ev "simrs-vx/internal/domain/main-entities/village"
+	edb "simrs-vx/internal/domain/main-entities/district/base"
+	er "simrs-vx/internal/domain/main-entities/regency"
+	evb "simrs-vx/internal/domain/main-entities/village/base"
 )
 
 type CreateDto struct {
@@ -47,11 +49,9 @@ type MetaDto struct {
 }
 
 type ResponseDto struct {
-	Id           uint32        `json:"id"`
-	Regency_Code string        `json:"regency_code"`
-	Code         string        `json:"code"`
-	Name         string        `json:"name"`
-	Villages     []*ev.Village `json:"villages,omitempty"`
+	edb.Basic
+	Regency  *er.Regency  `json:"regency,omitempty"`
+	Villages []*evb.Basic `json:"villages,omitempty"`
 }
 
 func (d District) ToResponse() ResponseDto {
diff --git a/internal/domain/main-entities/district/entity.go b/internal/domain/main-entities/district/entity.go
index a3ad27e7..b9cb89c3 100644
--- a/internal/domain/main-entities/district/entity.go
+++ b/internal/domain/main-entities/district/entity.go
@@ -1,11 +1,13 @@
 package district
 
-import ev "simrs-vx/internal/domain/main-entities/village"
+import (
+	edb "simrs-vx/internal/domain/main-entities/district/base"
+	er "simrs-vx/internal/domain/main-entities/regency"
+	evb "simrs-vx/internal/domain/main-entities/village/base"
+)
 
 type District struct {
-	Id           uint32        `json:"id" gorm:"primaryKey"`
-	Regency_Code string        `json:"regency_code" gorm:"size:4"`
-	Code         string        `json:"code" gorm:"unique;size:6"` // NOTE: THE PROPER SIZE IS 6
-	Name         string        `json:"name" gorm:"size:50"`
-	Villages     []*ev.Village `json:"villages,omitempty" gorm:"foreignKey:District_Code;references:Code"`
+	edb.Basic
+	Regency  *er.Regency  `json:"regency,omitempty" gorm:"foreignKey:Regency_Code;references:Code"`
+	Villages []*evb.Basic `json:"villages,omitempty" gorm:"foreignKey:District_Code;references:Code"`
 }
diff --git a/internal/domain/main-entities/postal-code/base/entity.go b/internal/domain/main-entities/postal-code/base/entity.go
new file mode 100644
index 00000000..814e4e72
--- /dev/null
+++ b/internal/domain/main-entities/postal-code/base/entity.go
@@ -0,0 +1,7 @@
+package base
+
+type Basic struct {
+	Id           uint32 `json:"id" gorm:"primaryKey"`
+	Village_Code string `json:"village_code" gorm:"size:10"`
+	Code         string `json:"code" gorm:"unique;size:5"`
+}
diff --git a/internal/domain/main-entities/postal-code/dto.go b/internal/domain/main-entities/postal-code/dto.go
new file mode 100644
index 00000000..cb1e3d39
--- /dev/null
+++ b/internal/domain/main-entities/postal-code/dto.go
@@ -0,0 +1,60 @@
+package postalcode
+
+import (
+	ecore "simrs-vx/internal/domain/base-entities/core"
+)
+
+type CreateDto struct {
+	Code         string `json:"code" validate:"numeric;maxLength=10"`
+	Village_Code string `json:"district_code" validate:"numeric;maxLength=10"`
+}
+
+type ReadListDto struct {
+	District_Code string `json:"district_code"`
+	Code          string `json:"code"`
+	Name          string `json:"name"`
+	Pagination    ecore.Pagination
+}
+
+type ReadDetailDto struct {
+	Id   uint32  `json:"id"`
+	Code *string `json:"code"`
+}
+
+type UpdateDto struct {
+	Id uint32 `json:"id"`
+	CreateDto
+}
+
+type DeleteDto struct {
+	Id uint32 `json:"id"`
+}
+
+type MetaDto struct {
+	PageNumber int `json:"page_number"`
+	PageSize   int `json:"page_size"`
+	Count      int `json:"count"`
+}
+
+type ResponseDto struct {
+	Id           uint32 `json:"id"`
+	Village_Code string `json:"village_code"`
+	Code         string `json:"code"`
+}
+
+func (d PostalCode) ToResponse() ResponseDto {
+	resp := ResponseDto{
+		Id:           d.Id,
+		Village_Code: d.Village_Code,
+		Code:         d.Code,
+	}
+	return resp
+}
+
+func ToResponseList(data []PostalCode) []ResponseDto {
+	resp := make([]ResponseDto, len(data))
+	for i, u := range data {
+		resp[i] = u.ToResponse()
+	}
+	return resp
+}
diff --git a/internal/domain/main-entities/postal-code/entity.go b/internal/domain/main-entities/postal-code/entity.go
new file mode 100644
index 00000000..2825db9c
--- /dev/null
+++ b/internal/domain/main-entities/postal-code/entity.go
@@ -0,0 +1,11 @@
+package postalcode
+
+import (
+	ep "simrs-vx/internal/domain/main-entities/postal-code/base"
+	ev "simrs-vx/internal/domain/main-entities/village"
+)
+
+type PostalCode struct {
+	ep.Basic
+	Village *ev.Village `json:"village,omitempty" gorm:"foreignKey:Village_Code;references:Code"`
+}
diff --git a/internal/domain/main-entities/province/dto.go b/internal/domain/main-entities/province/dto.go
index cf49cd43..e8ea71ce 100644
--- a/internal/domain/main-entities/province/dto.go
+++ b/internal/domain/main-entities/province/dto.go
@@ -2,7 +2,7 @@ package province
 
 import (
 	ecore "simrs-vx/internal/domain/base-entities/core"
-	er "simrs-vx/internal/domain/main-entities/regency"
+	erb "simrs-vx/internal/domain/main-entities/regency/base"
 )
 
 type CreateDto struct {
@@ -45,14 +45,19 @@ type MetaDto struct {
 }
 
 type ResponseDto struct {
-	Id        int16         `json:"id"`
-	Code      string        `json:"code"`
-	Name      string        `json:"name"`
-	Regencies []*er.Regency `json:"regencies,omitempty"`
+	Id        int16       `json:"id"`
+	Code      string      `json:"code"`
+	Name      string      `json:"name"`
+	Regencies []erb.Basic `json:"regencies,omitempty"`
 }
 
 func (d Province) ToResponse() ResponseDto {
-	resp := ResponseDto(d)
+	resp := ResponseDto{
+		Id:        d.Id,
+		Code:      d.Code,
+		Name:      d.Name,
+		Regencies: d.Regencies,
+	}
 	return resp
 }
 
diff --git a/internal/domain/main-entities/province/entity.go b/internal/domain/main-entities/province/entity.go
index ab024b22..198cf4a4 100644
--- a/internal/domain/main-entities/province/entity.go
+++ b/internal/domain/main-entities/province/entity.go
@@ -1,10 +1,10 @@
 package province
 
-import er "simrs-vx/internal/domain/main-entities/regency"
+import erb "simrs-vx/internal/domain/main-entities/regency/base"
 
 type Province struct {
-	Id        int16         `json:"id" gorm:"primaryKey"`
-	Code      string        `json:"code" gorm:"unique;size:2"`
-	Name      string        `json:"name" gorm:"size:50"`
-	Regencies []*er.Regency `json:"regencies,omitempty" gorm:"foreignKey:Province_Code;references:Code"`
+	Id        int16       `json:"id" gorm:"primaryKey"`
+	Code      string      `json:"code" gorm:"unique;size:2"`
+	Name      string      `json:"name" gorm:"size:50"`
+	Regencies []erb.Basic `json:"regencies,omitempty" gorm:"foreignKey:Province_Code;references:Code"`
 }
diff --git a/internal/domain/main-entities/regency/base/entitiy.go b/internal/domain/main-entities/regency/base/entitiy.go
new file mode 100644
index 00000000..b6c982ec
--- /dev/null
+++ b/internal/domain/main-entities/regency/base/entitiy.go
@@ -0,0 +1,8 @@
+package base
+
+type Basic struct {
+	Id            uint32 `json:"id" gorm:"primaryKey"`
+	Province_Code string `json:"province_code" gorm:"size:2"`
+	Code          string `json:"code" gorm:"unique;size:4"`
+	Name          string `json:"name" gorm:"size:50"`
+}
diff --git a/internal/domain/main-entities/regency/dto.go b/internal/domain/main-entities/regency/dto.go
index 0bc7ca51..f709f001 100644
--- a/internal/domain/main-entities/regency/dto.go
+++ b/internal/domain/main-entities/regency/dto.go
@@ -2,7 +2,9 @@ package regency
 
 import (
 	ecore "simrs-vx/internal/domain/base-entities/core"
-	ed "simrs-vx/internal/domain/main-entities/district"
+	edb "simrs-vx/internal/domain/main-entities/district/base"
+	ep "simrs-vx/internal/domain/main-entities/province"
+	erb "simrs-vx/internal/domain/main-entities/regency/base"
 )
 
 type CreateDto struct {
@@ -47,15 +49,17 @@ type MetaDto struct {
 }
 
 type ResponseDto struct {
-	Id            uint16         `json:"id"`
-	Province_Code string         `json:"province_code"`
-	Code          string         `json:"code"`
-	Name          string         `json:"name"`
-	Districts     []*ed.District `json:"districts,omitempty"`
+	erb.Basic
+	Province  *ep.Province `json:"province,omitempty"`
+	Districts []*edb.Basic `json:"districts,omitempty"`
 }
 
 func (d Regency) ToResponse() ResponseDto {
-	resp := ResponseDto(d)
+	resp := ResponseDto{
+		Basic:     d.Basic,
+		Province:  d.Province,
+		Districts: d.Districts,
+	}
 	return resp
 }
 
diff --git a/internal/domain/main-entities/regency/entity.go b/internal/domain/main-entities/regency/entity.go
index 3bdcf934..bf58e37b 100644
--- a/internal/domain/main-entities/regency/entity.go
+++ b/internal/domain/main-entities/regency/entity.go
@@ -1,11 +1,13 @@
 package regency
 
-import ed "simrs-vx/internal/domain/main-entities/district"
+import (
+	edb "simrs-vx/internal/domain/main-entities/district/base"
+	ep "simrs-vx/internal/domain/main-entities/province"
+	erb "simrs-vx/internal/domain/main-entities/regency/base"
+)
 
 type Regency struct {
-	Id            uint16         `json:"id" gorm:"primaryKey"`
-	Province_Code string         `json:"province_code" gorm:"size:2"`
-	Code          string         `json:"code" gorm:"unique;size:4"`
-	Name          string         `json:"name" gorm:"size:50"`
-	Districts     []*ed.District `json:"districts,omitempty" gorm:"foreignKey:Regency_Code;references:Code"`
+	erb.Basic
+	Province  *ep.Province `json:"province,omitempty" gorm:"foreignKey:Province_Code;references:Code"`
+	Districts []*edb.Basic `json:"districts,omitempty" gorm:"foreignKey:Regency_Code;references:Code"`
 }
diff --git a/internal/domain/main-entities/village/base/entity.go b/internal/domain/main-entities/village/base/entity.go
new file mode 100644
index 00000000..45cba2ba
--- /dev/null
+++ b/internal/domain/main-entities/village/base/entity.go
@@ -0,0 +1,8 @@
+package base
+
+type Basic struct {
+	Id            uint32 `json:"id" gorm:"primaryKey"`
+	District_Code string `json:"district_code" gorm:"size:6"`
+	Code          string `json:"code" gorm:"unique;size:10"`
+	Name          string `json:"name" gorm:"size:50"`
+}
diff --git a/internal/domain/main-entities/village/dto.go b/internal/domain/main-entities/village/dto.go
index 70b738df..42e806ec 100644
--- a/internal/domain/main-entities/village/dto.go
+++ b/internal/domain/main-entities/village/dto.go
@@ -2,6 +2,9 @@ package village
 
 import (
 	ecore "simrs-vx/internal/domain/base-entities/core"
+	ed "simrs-vx/internal/domain/main-entities/district"
+	epb "simrs-vx/internal/domain/main-entities/postal-code/base"
+	evb "simrs-vx/internal/domain/main-entities/village/base"
 )
 
 type CreateDto struct {
@@ -46,14 +49,17 @@ type MetaDto struct {
 }
 
 type ResponseDto struct {
-	Id            uint32 `json:"id"`
-	District_Code string `json:"district_code"`
-	Code          string `json:"code"`
-	Name          string `json:"name"`
+	evb.Basic
+	District    *ed.District `json:"district,omitempty"`
+	PostalCodes []epb.Basic  `json:"postalCodes,omitempty"`
 }
 
 func (d Village) ToResponse() ResponseDto {
-	resp := ResponseDto(d)
+	resp := ResponseDto{
+		Basic:       d.Basic,
+		District:    d.District,
+		PostalCodes: d.PostalCodes,
+	}
 	return resp
 }
 
diff --git a/internal/domain/main-entities/village/entity.go b/internal/domain/main-entities/village/entity.go
index aae0caf5..d7c549bc 100644
--- a/internal/domain/main-entities/village/entity.go
+++ b/internal/domain/main-entities/village/entity.go
@@ -1,8 +1,13 @@
 package village
 
+import (
+	ed "simrs-vx/internal/domain/main-entities/district"
+	epb "simrs-vx/internal/domain/main-entities/postal-code/base"
+	evb "simrs-vx/internal/domain/main-entities/village/base"
+)
+
 type Village struct {
-	Id            uint32 `json:"id" gorm:"primaryKey"`
-	District_Code string `json:"district_code" gorm:"size:6"` // NOT: THE PROPER SIZE IS 6
-	Code          string `json:"code" gorm:"unique;size:10"`
-	Name          string `json:"name" gorm:"size:50"`
+	evb.Basic
+	District    *ed.District `json:"district,omitempty" gorm:"foreignKey:District_Code;references:Code"`
+	PostalCodes []epb.Basic  `json:"postalCodes,omitempty" gorm:"foreignKey:Village_Code;references:Code"`
 }
diff --git a/internal/interface/migration/main-entities.go b/internal/interface/migration/main-entities.go
index 9711c6bd..fcb3db9e 100644
--- a/internal/interface/migration/main-entities.go
+++ b/internal/interface/migration/main-entities.go
@@ -57,6 +57,7 @@ import (
 	personrelative "simrs-vx/internal/domain/main-entities/person-relative"
 	pharmacist "simrs-vx/internal/domain/main-entities/pharmacist"
 	pharmacycompany "simrs-vx/internal/domain/main-entities/pharmacy-company"
+	postalcode "simrs-vx/internal/domain/main-entities/postal-code"
 	practiceschedule "simrs-vx/internal/domain/main-entities/practice-schedule"
 	prescription "simrs-vx/internal/domain/main-entities/prescription"
 	prescriptionitem "simrs-vx/internal/domain/main-entities/prescription-item"
@@ -149,5 +150,6 @@ func getMainEntities() []any {
 		&consultation.Consultation{},
 		&chemo.Chemo{},
 		&midwife.Midwife{},
+		&postalcode.PostalCode{},
 	}
 }