diff --git a/src/data/repositories/ConfigD2Repository.ts b/src/data/repositories/ConfigD2Repository.ts
index ce5f19df..6fc5db03 100644
--- a/src/data/repositories/ConfigD2Repository.ts
+++ b/src/data/repositories/ConfigD2Repository.ts
@@ -1,11 +1,11 @@
 import { apiToFuture } from "$/data/api-futures";
 import { metadataCodes } from "$/data/repositories/D2ApiMetadata";
 import { Config, UserGroup } from "$/domain/entities/Config";
-import { Region } from "$/domain/entities/Region";
+import { Project } from "$/domain/entities/Project";
+import { Region, extractRegionCode } from "$/domain/entities/Region";
 import { Future, FutureData } from "$/domain/entities/generic/Future";
 import { ConfigRepository } from "$/domain/repositories/ConfigRepository";
 import { D2Api } from "$/types/d2-api";
-import { extractFirstTwoLetters, extractPrefix } from "$/utils/string";
 
 export class ConfigD2Repository implements ConfigRepository {
     constructor(private api: D2Api) {}
@@ -45,7 +45,7 @@ export class ConfigD2Repository implements ConfigRepository {
                 id: region.id,
                 name: region.name,
                 // org. unit code includes the region code in the first two letters before the underscore
-                code: extractFirstTwoLetters(region.code),
+                code: Project.extractCode(region.code),
             }));
         });
     }
@@ -61,7 +61,7 @@ export class ConfigD2Repository implements ConfigRepository {
                 id: d2UserGroup.id,
                 name: d2UserGroup.name,
                 // user group name includes the region code in the first two letters
-                code: extractPrefix(d2UserGroup.name),
+                code: extractRegionCode(d2UserGroup.name),
             }));
         });
     }
diff --git a/src/domain/entities/DataSet.ts b/src/domain/entities/DataSet.ts
index 2a769cc3..590e0bdf 100644
--- a/src/domain/entities/DataSet.ts
+++ b/src/domain/entities/DataSet.ts
@@ -10,7 +10,7 @@ import { validateOrgUnits, validateRequired } from "$/domain/entities/generic/Va
 import { Indicator } from "$/domain/entities/Indicator";
 import { Config, UserGroup } from "$/domain/entities/Config";
 import { DataSetToSave } from "$/domain/entities/DataSetToSave";
-import { extractFirstTwoLetters, extractPrefix } from "$/utils/string";
+import { extractRegionCode } from "$/domain/entities/Region";
 
 export type DataSetAttrs = {
     created: ISODateString;
@@ -133,7 +133,7 @@ export class DataSet extends Struct<DataSetAttrs>() {
     getRegionCodesFromAccess(): string[] {
         return _(this.access)
             .filter(access => access.type === "groups")
-            .compactMap(access => extractPrefix(access.name))
+            .compactMap(access => Project.extractCode(access.name))
             .uniq()
             .value();
     }
@@ -184,7 +184,7 @@ export class DataSet extends Struct<DataSetAttrs>() {
     }
 
     private getAccessFromOrgUnits(orgUnits: OrgUnit[], config: Config): AccessData[] {
-        const orgsUnitsCodes = orgUnits.map(orgUnit => extractFirstTwoLetters(orgUnit.code));
+        const orgsUnitsCodes = orgUnits.map(orgUnit => extractRegionCode(orgUnit.code));
 
         const regions = config.regions.filter(region => orgsUnitsCodes.includes(region.code));
         const regionsCodes = regions.map(region => region.code);
@@ -198,7 +198,7 @@ export class DataSet extends Struct<DataSetAttrs>() {
 
     private getAccessFromProject(project: Maybe<Project>, config: Config): AccessData[] {
         if (!project || !project.code) return [];
-        const regionCode = extractFirstTwoLetters(project.code);
+        const regionCode = extractRegionCode(project.code);
 
         const region = config.regions.find(region => region.code === regionCode);
         const userGroups = config.userGroups.filter(userGroup => userGroup.code === region?.code);
diff --git a/src/domain/entities/Project.ts b/src/domain/entities/Project.ts
index 0f9580e5..4992eb18 100644
--- a/src/domain/entities/Project.ts
+++ b/src/domain/entities/Project.ts
@@ -30,4 +30,17 @@ export class Project extends Struct<ProjectAttrs>() {
     static setDataSets(project: ProjectAttrs, dataSets: DataSet[]): Project {
         return Project.build({ ...project, dataSets });
     }
+
+    /**
+     * Extracts the portion of a code string before the first underscore ("_")
+     * and converts it to uppercase.
+     *
+     * Example:
+     * Input: "us_region"
+     * Output: "US"
+     *
+     */
+    static extractCode(value: string): string {
+        return (value.split("_")[0] || "").toUpperCase();
+    }
 }
diff --git a/src/domain/entities/Region.ts b/src/domain/entities/Region.ts
index a0c597c8..35d07872 100644
--- a/src/domain/entities/Region.ts
+++ b/src/domain/entities/Region.ts
@@ -1,3 +1,17 @@
 import { NamedCodeRef } from "$/domain/entities/Ref";
 
 export type Region = NamedCodeRef;
+
+/**
+ * Extracts the first two characters of a string and convert it to uppercase.
+ * If the input string is empty, returns an empty string.
+ *
+ * Example:
+ * Input: "us123"
+ * Output: "US"
+ *
+ */
+
+export function extractRegionCode(value: string): string {
+    return (value.slice(0, 2) || "").toUpperCase();
+}
diff --git a/src/utils/string.ts b/src/utils/string.ts
deleted file mode 100644
index 0469d84d..00000000
--- a/src/utils/string.ts
+++ /dev/null
@@ -1,26 +0,0 @@
-/**
- * Extracts the first two characters of a string and convert it to uppercase.
- * If the input string is empty, returns an empty string.
- *
- * Example:
- * Input: "us123"
- * Output: "US"
- *
- */
-
-export function extractFirstTwoLetters(value: string): string {
-    return (value.slice(0, 2) || "").toUpperCase();
-}
-
-/**
- * Extracts the portion of a code string before the first underscore ("_")
- * and converts it to uppercase.
- *
- * Example:
- * Input: "us_region"
- * Output: "US"
- *
- */
-export function extractPrefix(value: string): string {
-    return (value.split("_")[0] || "").toUpperCase();
-}