diff --git a/js/sub4.js b/js/sub4.js
new file mode 100644
index 0000000..c657bfe
--- /dev/null
+++ b/js/sub4.js
@@ -0,0 +1,67 @@
+const url = "restAPI/phone.php";
+
+const result = fetch(url)
+.then(res => res.json())
+.then(data => {
+	if(data.statusCd !== "200") {
+		alert("조회에 실패했습니다");
+
+		return location.href = "index.html";
+	};
+
+	return [...data.items].reduce(((item, { sn, deptNm, name, telNo }) => {
+		item[deptNm] = [...item[deptNm] || [], {sn, name, telNo}]
+
+		return item;
+	}), {});
+});
+
+const $tabBox = document.querySelector("#tab-box");
+const $phoneBox = document.querySelector("#phone-box");
+
+result.then(items => {
+	const tabs = Object.keys(items);
+
+	tabs.forEach(tab => {
+		$tabBox.insertAdjacentHTML("beforeend", `<li class="tab">${tab}</li>`);
+
+		$phoneBox.insertAdjacentHTML("beforeend", `
+			<div class="phone-box" data-tab="${tab}">
+				<div class="phone-header">
+					<h1>${tab}</h1>
+					<hr>
+				</div>
+				<div class="phone-body"></div>
+			</div>
+		`);
+
+		items[tab].forEach(item => {
+			const $phone = [...$phoneBox.children].filter(element => element.dataset.tab === tab)[0];
+			$phone.children[1].insertAdjacentHTML("beforeend", `
+				<div class="phone">
+					<li>${item["name"]}</li>
+					<li>${item["telNo"]}</li>
+				</div>
+			`);
+		});
+	});
+});
+
+$tabBox.addEventListener("click", ({ target }) => {
+	if(!target.classList.contains("tab")) return false;
+
+	const tabs = [...target.parentNode.children];
+	const index = tabs.findIndex(element => element === target);
+
+	tabs.forEach(element => element.classList.remove("active-tab"));
+	tabs[index].classList.add("active-tab");
+
+	if(target.getAttribute("name") === "all") {
+		return [...$phoneBox.children].forEach(element => element.style.display = "flex");			
+	};
+
+	const $phone = [...$phoneBox.children].filter(element => element.dataset.tab === tabs[index].textContent)[0];
+	[...$phoneBox.children].forEach(element => element.style.display = "none");
+
+	$phone.style.display = "flex";
+});
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