diff --git a/src/index.ts b/src/index.ts
index c959b33..922a168 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -2,10 +2,16 @@ import bgpq4 from "./bgpq4";
 import fs from "node:fs";
 import YAML from "yaml";
 import { getNetName } from "./pdb";
+import LRUCache from "lru-cache";
 
 import axios from "axios";
 import { env } from "node:process";
 
+const cache = new LRUCache({
+	max: 500,
+	ttl: 1000 * 60 * 5,
+});
+
 const main = async () => {
 	const config: {
 		"MNT-BY": string[];
@@ -44,6 +50,7 @@ const main = async () => {
 				Object.keys(config["AS-SETS"]).length
 			})\n`
 		);
+
 		let members = await Promise.all(
 			config.members.map(async (member) => {
 				const setName = Object.keys(member)[0];
@@ -60,9 +67,18 @@ const main = async () => {
 
 				console.log("Add", setName, answer, "to", asSetName);
 
-				return answer.filter(
-					(as) => !(config["AS-SETS"][asSetName].expect ?? [0]).includes(as)
-				);
+				const asnList = answer
+					.filter(
+						(as) => !(config["AS-SETS"][asSetName].expect ?? [0]).includes(as)
+					)
+					.filter(Boolean)
+					.sort();
+
+				asnList.forEach((k) => {
+					if (!cache.has(k)) cache.set(k, setName);
+				});
+
+				return asnList;
 			})
 		);
 
@@ -79,9 +95,7 @@ const main = async () => {
 			"TECH-C": config["TECH-C"],
 			"ADMIN-C": config["ADMIN-C"],
 			remarks: config["AS-SETS"][asSetName].remarks,
-			members: Array.from(new Set(members.flat(Infinity)))
-				.filter(Boolean)
-				.sort() as number[],
+			members: [...new Set(members.flat(Infinity))].filter(Boolean) as any,
 			include: (config["AS-SETS"][asSetName].include ?? []).sort(),
 		});
 		i++;
@@ -99,7 +113,8 @@ ${k.remarks.map((k) => `remarks: ${k}`).join("\n")}
 ${(
 	await Promise.all(
 		k.members.map(
-			async (k) => `remarks: ${await getNetName(k)}\nmembers: AS${k}`
+			async (k) =>
+				`remarks: ${await getNetName(k)} from ${cache.get(k)}\nmembers: AS${k}`
 		)
 	)
 ).join("\n")}${k.include.map((k) => `\nmembers: ${k}`)}