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News, tips & advice from FastSMS

Scheduled platform maintenance

Over the past several months we have worked hard to bring some big improvements to FastSMS. As part of our preparations for making this exciting upgrade available to customers (more news on this coming very soon!) we have scheduled the following maintenance window:

Start:     Sun 7th July 23:00 BST
Finish:    Mon 8th July 01:00 BST

Our team have worked diligently to plan the maintenance to minimise disruption to the FastSMS service. However, this essential work will require the platform to be taken offline for a period of time. During the maintenance window there will be an interruption to all FastSMS services lasting up to 2 hours.

As a result of this you will not be able to access your NetMessenger account during this offline period. Any outbound messages that you attempt to submit through an API (HTTP or XML) or through the Email-to-SMS service will not be processed. However, inbound messages will be queued and then passed to you in the usual way when the platform is returned to its online state.

New IP address range
The maintenance work will result in a change to the IP addresses we use to support your connection to the FastSMS platform. For many users this IP address change will be completely transparent and you do not need to make any changes. However, if your network environment is more restricted you should ask your IT support team to check and update your security policy to include connections to/from our new IP address range: to

The FAQ document provides more detail about the IP address ranges we use to support our services.

If you have any questions or concerns about this, please call us on 0800 954 5305 or email helpdesk@fastsms.co.uk and we will respond as soon as possible.