My ZONE Plus


More tools for your IDD calls

Block unauthorized calls



The first such tool in the market, 1511BLACKLIST prevents fraudulent or unauthorised calls. 
Use ZONE1511 with absolute peace of mind by activating this unique feature to:


Block outgoing calls to specific destinations to reduce the possibility of IDD abuse in your company.

Indicate destinations to be blocked out by country code, area code or individual phone number.


For existing ZONE1511 customers, please login to your ZONE1511 account. or
download the application form below to indicate destinations you want to blacklist.

For new customers, please sign up for a ZONE1511 account and log into your account to enjoy the feature.


We are happy to answer any questions.

Just send us a message by clicking the contact us now button.