diff --git a/server/routers/client/createClient.ts b/server/routers/client/createClient.ts
index 34aef346..4e9dcdce 100644
--- a/server/routers/client/createClient.ts
+++ b/server/routers/client/createClient.ts
@@ -144,14 +144,16 @@ export async function createClient(
         const subnetExistsClients = await db
             .select()
             .from(clients)
-            .where(eq(clients.subnet, updatedSubnet))
+            .where(
+                and(eq(clients.subnet, updatedSubnet), eq(clients.orgId, orgId))
+            )
             .limit(1);
 
         if (subnetExistsClients.length > 0) {
             return next(
                 createHttpError(
                     HttpCode.CONFLICT,
-                    `Subnet ${subnet} already exists`
+                    `Subnet ${updatedSubnet} already exists in clients`
                 )
             );
         }
@@ -159,14 +161,16 @@ export async function createClient(
         const subnetExistsSites = await db
             .select()
             .from(sites)
-            .where(eq(sites.address, updatedSubnet))
+            .where(
+                and(eq(sites.address, updatedSubnet), eq(sites.orgId, orgId))
+            )
             .limit(1);
 
         if (subnetExistsSites.length > 0) {
             return next(
                 createHttpError(
                     HttpCode.CONFLICT,
-                    `Subnet ${subnet} already exists`
+                    `Subnet ${updatedSubnet} already exists in sites`
                 )
             );
         }
diff --git a/server/routers/site/createSite.ts b/server/routers/site/createSite.ts
index 60e34465..fb1170cd 100644
--- a/server/routers/site/createSite.ts
+++ b/server/routers/site/createSite.ts
@@ -129,17 +129,17 @@ export async function createSite(
             );
         }
 
-        if (!org.subnet) {
-            return next(
-                createHttpError(
-                    HttpCode.BAD_REQUEST,
-                    `Organization with ID ${orgId} has no subnet defined`
-                )
-            );
-        }
-
         let updatedAddress = null;
         if (address) {
+            if (!org.subnet) {
+                return next(
+                    createHttpError(
+                        HttpCode.BAD_REQUEST,
+                        `Organization with ID ${orgId} has no subnet defined`
+                    )
+                );
+            }
+
             if (!isValidIP(address)) {
                 return next(
                     createHttpError(