diff --git a/ardumont/schedule_csv_range.py b/ardumont/schedule_csv_range.py
new file mode 100644
index 0000000..2812759
--- /dev/null
+++ b/ardumont/schedule_csv_range.py
@@ -0,0 +1,23 @@
+import click
+
+
+@click.command()
+def main(limit):
+    # sha1 range
+    # 160 bits (20 byte) length
+    bound_max_minus = 2**159
+    bound_max = 2**160 - 1
+    step = 2**16
+
+    def to_hex(number):
+        return '{:040x}'.format(number)
+
+    for start, end in zip(
+            range(0, bound_max_minus, step), range(step, bound_max, step)):
+        hex_start = to_hex(start)
+        hex_end = to_hex(end)
+        print('["%s", "%s"]' % (hex_start, hex_end))
+
+
+if __name__ == '__main__':
+    main()