The following command deletes the IP range 4.4.0.0:

Situation before delete: 

<?xml version="1.0" encoding="ISO-8859-1"?>
<Response stat="200" code="ok">
<Success><Data><IPAddress><Index>1</Index>
<Used>Y</Used>
<Ip>4.4.0.0</Ip>
<IPAddress>4.4.0.0</IPAddress>
<Mask>16</Mask>
<Country>-1</Country>
<IsCustom>N</IsCustom>
<CustomLocation>0</CustomLocation>
</IPAddress></Data>
</Success>
</Response>
curl -k "https://bal:1fourall@20.200.25.100/access/delip?ip=4.4.0.0"

Situation after delete: 

<?xml version="1.0" encoding="ISO-8859-1"?>
<Response stat="404" code="fail">
<Error>No geo data found</Error>
</Response>