diff --git a/src/components/networkByIdPage/memberOptionsModal.tsx b/src/components/networkByIdPage/memberOptionsModal.tsx
index c12aeb3c..ae0127e6 100644
--- a/src/components/networkByIdPage/memberOptionsModal.tsx
+++ b/src/components/networkByIdPage/memberOptionsModal.tsx
@@ -137,22 +137,6 @@ export const MemberOptionsModal: React.FC<ModalContentProps> = ({
 			return;
 		}
 
-		const regex = new RegExp(
-			"^(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\." +
-				"(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\." +
-				"(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\." +
-				"(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$",
-		);
-
-		if (!regex.test(ipInput)) {
-			void toast.error(
-				t("networkById.memberOptionModal.handleSumbit.errorNotValidIp", {
-					target,
-				}),
-			);
-			return;
-		}
-
 		updateMember(
 			{
 				updateParams: { ipAssignments: [...ipAssignments, ipInput] },
diff --git a/src/server/api/routers/memberRouter.ts b/src/server/api/routers/memberRouter.ts
index 4f6a458a..fe0c8cd8 100644
--- a/src/server/api/routers/memberRouter.ts
+++ b/src/server/api/routers/memberRouter.ts
@@ -13,6 +13,7 @@ import {
 } from "~/types/webhooks";
 import { sendWebhook } from "~/utils/webhook";
 import { throwError } from "~/server/helpers/errorHandler";
+import { isValidIP } from "../utils/ipUtils";
 
 const isValidZeroTierNetworkId = (id: string) => {
 	const hexRegex = /^[0-9a-fA-F]{10}$/;
@@ -220,6 +221,16 @@ export const networkMemberRouter = createTRPCRouter({
 
 			// update ip specified by user UI
 			if (input.updateParams.ipAssignments) {
+				const ips = input.updateParams.ipAssignments;
+				const invalidIPs = ips.filter((ip) => !isValidIP(ip));
+
+				if (invalidIPs.length > 0) {
+					throw new TRPCError({
+						message: "Invalid IP addresses provided",
+						code: "BAD_REQUEST",
+					});
+				}
+
 				// update member
 				Object.assign(payload, {}, { ipAssignments: input.updateParams.ipAssignments });
 			}