diff --git a/stand/beamline.py b/stand/beamline.py
new file mode 100644
index 0000000..5c540ec
--- /dev/null
+++ b/stand/beamline.py
@@ -0,0 +1,19 @@
+
+SUBNET_TO_BEAMLINE = {
+    "129.129.242": "SARESA",
+    "129.129.243": "SARESB",
+    "129.129.244": "SARESC",
+    "129.129.245": "SATESD",
+    "129.129.246": "SATESE",
+    "129.129.247": "SATESF"
+}
+
+
+def get_beamline(ip):
+    if ip == "127.0.0.1":
+        return "stand"
+    subnet = ".".join(ip.split(".")[:3])
+    return SUBNET_TO_BEAMLINE[subnet]
+
+
+