diff --git a/ip-renew/README.md b/ip-renew/README.md
index 1d4bdc9..81ae3e5 100644
--- a/ip-renew/README.md
+++ b/ip-renew/README.md
@@ -30,4 +30,8 @@
     
     # Factory default 주소로 복원
     Set-NetAdapter -Name "이더넷" -MacAddress "" -Confirm:$false
-    ```
\ No newline at end of file
+    ```
+
+
+## 국내 ISP별 IP 범위 정보
+- https://krnic.or.kr/jsp/business/management/isCurrentIpv4.jsp
\ No newline at end of file