diff --git a/infra/infra-hosts.md b/infra/infra-hosts.md
index db23fc0..a44e7ab 100644
--- a/infra/infra-hosts.md
+++ b/infra/infra-hosts.md
@@ -129,6 +129,7 @@ tags: [infra, network, kr-zone, openwrt]
   - 스크립트: `/etc/cdn-filter-update.sh`
   - nftables: `/etc/nftables.d/10-cdn-filter.nft`
   - 크론: 매일 04:00 업데이트
+- **Tailscale 광고 대역**: 10.100.1.0/24 (kr2), 10.100.2.0/24 (hp2), 10.100.3.0/24 (kr1), 192.168.9.0/24 (LAN)
 - **DNS rebind 예외**: inouter.com (OpenWrt dnsmasq)
 - 공인 IP `220.120.65.245`는 OpenWrt 라우터의 IP