On the 27th November 2018 Nexmo will be adding a new subnet 169.63.86.160/28 to the range we use to send callbacks via HTTP requests from our US data centre. These callbacks may include SMS delivery receipts, inbound SMS, Voice API callbacks, NCCO download requests, audio file download requests. If you are whitelisting traffic from Nexmo then you will need to make the necessary updates on your side to avoid any disruption to your traffic.

On December 17th, 2018 we will be deprecating the following subnets - 174.36.197.192/28, 173.193.199.16/28 and 174.37.245.32/29. Any time after this date you may wish to remove these subnets from your firewall configuration. We will no longer use these IPs to send traffic to our customers.

More information can always be found on this in our Knowledge base article What IP addresses should I whitelist (https://help.nexmo.com/hc/en-us/articles/204015053-What-IP-addresses-should-I-whitelist-in-order-to-receive-HTTP-requests-from-Nexmo-) in order to receive HTTP requests from Nexmo - please subscribe to follow this article to ensure you receive updates for the latest information on our IP ranges.

We apologise in advance for any inconvenience this may cause. If you have any questions about this please don’t hesitate to contact your account manager or submit a support request at https://help.nexmo.com.
Posted on Nov 20, 16:33 UTC

On the 17th December 2018 Nexmo will be deprecating the range of IP addresses currently used for SMPP servers 0, 1 and 2.

Hostname - smpp0.nexmo.com
Current IP Address 174.37.245.38
New IP Address 108.168.254.225

Hostname - smpp1.nexmo.com
Current IP Address 174.37.245.37
New IP Address 108.168.254.238

Hostname - smpp2.nexmo.com
Current IP Address 174.36.197.197
New IP Address 108.168.254.239

The new IP addresses shown above are already live today. Therefore we would recommend that you bind either via hostname (which will not change) or the new IP addresses as soon as possible. After the December 17th the current/old IP addresses will no longer be available.

If you are whitelisting traffic in your firewall based on IP then you will need to add the new IP addresses as soon as possible. You must add the new IP address by December 17th to avoid any disruption to your traffic. On December 17th we will be modifying DNS A records to point all of the above hostnames to the new IP addresses.

We apologise in advance for any inconvenience this may cause. If you have any questions about this please don’t hesitate to contact your account manager or submit a support request at https://help.nexmo.com.
Posted on Nov 20, 16:37 UTC