diff --git a/vars/per-machine/neptune/phonebox/server-prefix-number/value b/vars/per-machine/neptune/phonebox/server-prefix-number/value
index 2edeafb..f599e28 100644
--- a/vars/per-machine/neptune/phonebox/server-prefix-number/value
+++ b/vars/per-machine/neptune/phonebox/server-prefix-number/value
@@ -1 +1 @@
-20
\ No newline at end of file
+10