diff --git a/src/db.c b/src/db.c
index 9d0c621..5ec20e2 100644
--- a/src/db.c
+++ b/src/db.c
@@ -28,7 +28,7 @@
 #include "db_bootstrap.h"
 
 /* This constant is currently duplicated in sql/hlr.sql and must be kept in sync! */
-#define CURRENT_SCHEMA_VERSION	4
+#define CURRENT_SCHEMA_VERSION	5
 
 #define SEL_COLUMNS \
 	"id," \
@@ -46,15 +46,17 @@
 	"ms_purged_cs," \
 	"ms_purged_ps," \
 	"last_lu_seen," \
-	"last_lu_seen_ps" \
+	"last_lu_seen_ps," \
+	"vlr_via_proxy," \
+	"sgsn_via_proxy"
 
 static const char *stmt_sql[] = {
 	[DB_STMT_SEL_BY_IMSI] = "SELECT " SEL_COLUMNS " FROM subscriber WHERE imsi = ?",
 	[DB_STMT_SEL_BY_MSISDN] = "SELECT " SEL_COLUMNS " FROM subscriber WHERE msisdn = ?",
 	[DB_STMT_SEL_BY_ID] = "SELECT " SEL_COLUMNS " FROM subscriber WHERE id = ?",
 	[DB_STMT_SEL_BY_IMEI] = "SELECT " SEL_COLUMNS " FROM subscriber WHERE imei = ?",
-	[DB_STMT_UPD_VLR_BY_ID] = "UPDATE subscriber SET vlr_number = $number WHERE id = $subscriber_id",
-	[DB_STMT_UPD_SGSN_BY_ID] = "UPDATE subscriber SET sgsn_number = $number WHERE id = $subscriber_id",
+	[DB_STMT_UPD_VLR_BY_ID] = "UPDATE subscriber SET vlr_number = $number, vlr_via_proxy = $proxy WHERE id = $subscriber_id",
+	[DB_STMT_UPD_SGSN_BY_ID] = "UPDATE subscriber SET sgsn_number = $number, sgsn_via_proxy = $proxy WHERE id = $subscriber_id",
 	[DB_STMT_UPD_IMEI_BY_IMSI] = "UPDATE subscriber SET imei = $imei WHERE imsi = $imsi",
 	[DB_STMT_AUC_BY_IMSI] =
 		"SELECT id, algo_id_2g, ki, algo_id_3g, k, op, opc, sqn, ind_bitlen"
@@ -183,6 +185,25 @@
 	return true;
 }
 
+bool db_bind_null(sqlite3_stmt *stmt, const char *param_name)
+{
+	int rc;
+	int idx = param_name ? sqlite3_bind_parameter_index(stmt, param_name) : 1;
+	if (idx < 1) {
+		LOGP(DDB, LOGL_ERROR, "Error composing SQL, cannot bind parameter '%s'\n",
+		     param_name);
+		return false;
+	}
+	rc = sqlite3_bind_null(stmt, idx);
+	if (rc != SQLITE_OK) {
+		LOGP(DDB, LOGL_ERROR, "Error binding NULL to SQL parameter %s: %d\n",
+		     param_name ? param_name : "#1", rc);
+		db_remove_reset(stmt);
+		return false;
+	}
+	return true;
+}
+
 void db_close(struct db_context *dbc)
 {
 	unsigned int i;
@@ -441,12 +462,30 @@
 	return rc;
 }
 
+static int db_upgrade_v5(struct db_context *dbc)
+{
+	int rc;
+	const char *statements[] = {
+		"ALTER TABLE subscriber ADD COLUMN vlr_via_proxy VARCHAR",
+		"ALTER TABLE subscriber ADD COLUMN sgsn_via_proxy VARCHAR",
+		"PRAGMA user_version = 5",
+	};
+
+	rc = db_run_statements(dbc, statements, ARRAY_SIZE(statements));
+	if (rc != SQLITE_DONE) {
+		LOGP(DDB, LOGL_ERROR, "Unable to update HLR database schema to version 5\n");
+		return rc;
+	}
+	return rc;
+}
+
 typedef int (*db_upgrade_func_t)(struct db_context *dbc);
 static db_upgrade_func_t db_upgrade_path[] = {
 	db_upgrade_v1,
 	db_upgrade_v2,
 	db_upgrade_v3,
 	db_upgrade_v4,
+	db_upgrade_v5,
 };
 
 static int db_get_user_version(struct db_context *dbc)
diff --git a/src/db_hlr.c b/src/db_hlr.c
index ec8f896..9073926 100644
--- a/src/db_hlr.c
+++ b/src/db_hlr.c
@@ -505,6 +505,8 @@
 			   subscr->imsi, "CS");
 	parse_last_lu_seen(&subscr->last_lu_seen_ps, (const char *)sqlite3_column_text(stmt, 15),
 			   subscr->imsi, "PS");
+	copy_sqlite3_text_to_ipa_name(&subscr->vlr_via_proxy, stmt, 16);
+	copy_sqlite3_text_to_ipa_name(&subscr->sgsn_via_proxy, stmt, 17);
 
 out:
 	db_remove_reset(stmt);
@@ -750,6 +752,14 @@
 	if (!db_bind_text(stmt, "$number", (char*)vlr_name->val))
 		return -EIO;
 
+	if (via_proxy && via_proxy->len) {
+		if (!db_bind_text(stmt, "$proxy", (char*)via_proxy->val))
+			return -EIO;
+	} else {
+		if (!db_bind_null(stmt, "$proxy"))
+			return -EIO;
+	}
+
 	/* execute the statement */
 	rc = sqlite3_step(stmt);
 	if (rc != SQLITE_DONE) {