diff --git a/config.sh b/config.sh
index 7d9f471..dadbe40 100644
--- a/config.sh
+++ b/config.sh
@@ -113,6 +113,9 @@ VBC_USER_ID=${VBC_USER_ID:-""}
 VBC_USERNAME=${VBC_USERNAME:-""}
 VBC_PASSWORD=${VBC_PASSWORD:-""}
 
+# Voice
+SIP_DOMAIN=${SIP_DOMAIN:-""}
+
 # If we have a local config, override using that
 CONFIG_DIR=$(dirname "${BASH_SOURCE[0]}")
 if [ -f "$CONFIG_DIR/config.local.sh" ]; then
diff --git a/voice/sip/create-domain.sh b/voice/sip/create-domain.sh
new file mode 100755
index 0000000..45abe77
--- /dev/null
+++ b/voice/sip/create-domain.sh
@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+source "../../config.sh"
+
+MY_IP_ADDRESS=$(curl ifconfig.co)
+
+curl -X POST -H "Content-Type: application/json" \
+    -d '{"name": "'$SIP_DOMAIN'", "application_id": "'$VONAGE_APPLICATION_ID'", "acl": ["'$MY_IP_ADDRESS'"]}' \
+    https://api.nexmo.com/v1/psip -u $VONAGE_API_KEY:$VONAGE_API_SECRET
diff --git a/voice/sip/delete-domain.sh b/voice/sip/delete-domain.sh
new file mode 100755
index 0000000..118a164
--- /dev/null
+++ b/voice/sip/delete-domain.sh
@@ -0,0 +1,4 @@
+#!/usr/bin/env bash
+source "../../config.sh"
+
+curl -X DELETE https://api.nexmo.com/v1/psip/$SIP_DOMAIN -u $VONAGE_API_KEY:$VONAGE_API_SECRET
diff --git a/voice/sip/query-domain.sh b/voice/sip/query-domain.sh
new file mode 100755
index 0000000..f04b3e7
--- /dev/null
+++ b/voice/sip/query-domain.sh
@@ -0,0 +1,4 @@
+#!/usr/bin/env bash
+source "../../config.sh"
+
+curl -X GET https://api.nexmo.com/v1/psip/$SIP_DOMAIN -u $VONAGE_API_KEY:$VONAGE_API_SECRET
diff --git a/voice/sip/update-domain.sh b/voice/sip/update-domain.sh
new file mode 100755
index 0000000..5491d1b
--- /dev/null
+++ b/voice/sip/update-domain.sh
@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+source "../../config.sh"
+
+curl -X PUT -H "Content-Type: application/json" \
+    -d '{"name": "'$SIP_DOMAIN'", "application_id": "'$VONAGE_APPLICATION_ID'", "acl": ["188.180.180.180", "77.77.77.0/24"]}' \
+    https://api.nexmo.com/v1/psip/$SIP_DOMAIN -u $VONAGE_API_KEY:$VONAGE_API_SECRET