diff --git a/artiq/examples/kc705_nist_clock/device_db.py b/artiq/examples/kc705_nist_clock/device_db.py
index 140fbd716..1b3c3e615 100644
--- a/artiq/examples/kc705_nist_clock/device_db.py
+++ b/artiq/examples/kc705_nist_clock/device_db.py
@@ -1,7 +1,7 @@
 # This is an example device database that needs to be adapted to your setup.
 # The list of devices here is not exhaustive.
 
-core_addr = "kc705-1.lab.m-labs.hk"
+core_addr = "192.168.1.50"
 
 device_db = {
     # Core device
diff --git a/artiq/examples/master/device_db.py b/artiq/examples/master/device_db.py
index 0d7a2d5e8..d08060e07 100644
--- a/artiq/examples/master/device_db.py
+++ b/artiq/examples/master/device_db.py
@@ -2,7 +2,7 @@
 # unit tests with release-3.
 # Remove and update buildbot when release-3 is no longer maintained.
 
-core_addr = "kc705-1.lab.m-labs.hk"
+core_addr = "192.168.1.50"
 
 device_db = {
     # Core device