What IP addresses should I whitelist in order to receive HTTP requests from Nexmo?


What IP addresses do I need to add to my firewall?

What IP addresses do you use to send requests to my MO or DLR webhook URL?

Can I use a firewall and still receive inbound requests from you?

I am not receiving callbacks to my HTTP server. Why might this be?


If you are restricting inbound traffic (including delivery receipts), please whitelist the following subnets: ( -  ( - ( - ( - ( -

in your firewall.

Inbound SMS traffic from Nexmo might come from any of the IP addresses included in the referenced subnets.

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