13 IP addresses, how to add them to domain SPF?

Posted by Willy on Server Fault See other posts from Server Fault or by Willy
Published on 2010-05-17T15:20:08Z Indexed on 2010/05/17 15:21 UTC
Read the original article Hit count: 285

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ip

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cidr

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spf

Hi All,

Let say I have these IP addresses on my server:

170.120.210.209 gateway
170.120.210.210 server IP
170.120.210.211
170.120.210.212
170.120.210.213
170.120.210.214
170.120.210.215
170.120.210.216
170.120.210.217
170.120.210.218
170.120.210.219
170.120.210.220
170.120.210.221
170.120.210.222

I am now willing to setup SPF record for my domain but don't want to write each IP one by one. Could you please tell me the short way of this?

How can I convert these IP addresses into CIDR notation?

Is this correct?

170.120.210.210/28

Thanks for your help.

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