diff --git a/data/category-ntp b/data/category-ntp
new file mode 100644
index 00000000..1c011f73
--- /dev/null
+++ b/data/category-ntp
@@ -0,0 +1,29 @@
+# Apple
+regexp:^time(.euro)?.apple.com$
+
+# Facebook
+regexp:^time([1-5])?.facebook.com$
+
+# Google
+regexp:^time([1-4])?.google.com$
+
+# NIST: https://tf.nist.gov/tf-cgi/servers.cgi
+regexp:^((((ut1-wwv)|(ntp\-(b|d|wwv))|(time(\-(([a-e]\-(g|b))|([a-e]\-wwv)))?)).nist.gov)|((ntp-c|ut1-time)|(utcnist(2|3)?)).colorado.edu)$
+
+# NTP-servers: https://ntp-servers.net/servers.html
+regexp:^ntp[0-7].ntp-servers.net$
+
+clock.isc.org
+ntp.fiord.ru
+ntp.nat.ms
+ntp.nic.cz
+ntp.nict.jp
+ntp.ripe.net
+ntp.se
+ntp.ufe.cz
+pool.ntp.org
+time.cloudflare.com
+time.nrc.ca
+time.windows.com
+
+include:category-ntp-cn
diff --git a/data/category-ntp-cn b/data/category-ntp-cn
new file mode 100644
index 00000000..a10f238c
--- /dev/null
+++ b/data/category-ntp-cn
@@ -0,0 +1,10 @@
+# Aliyun
+regexp:^ntp([1-7])?.aliyun.com$ @cn
+
+# Tencent
+regexp:^ntp([1-5])?.tencent.com$ @cn
+
+cn.pool.ntp.org @cn
+ntp.neu.edu.cn @cn
+ntp.ntsc.ac.cn @cn
+ntp.org.cn @cn
diff --git a/data/geolocation-!cn b/data/geolocation-!cn
index 93d86138..ae341d8a 100644
--- a/data/geolocation-!cn
+++ b/data/geolocation-!cn
@@ -153,6 +153,7 @@ include:falungong
 include:category-android-app-download
 include:category-browser-!cn
 include:category-enhance-gaming
+include:category-ntp
 include:decryptipastore # iOS
 
 include:accuweather
diff --git a/data/geolocation-cn b/data/geolocation-cn
index daaa5781..77263322 100644
--- a/data/geolocation-cn
+++ b/data/geolocation-cn
@@ -240,6 +240,7 @@ include:antutu
 include:bitauto
 include:category-collaborate-cn
 include:category-documents-cn
+include:category-ntp-cn
 include:capitalonline
 include:chinaso
 include:chinaz