On April 9th, GitHub will begin sending webhooks from the
184.108.40.206/20 range of IP addresses in addition to the older
We use a large pool of IP's to reach our customers, and we are adding further netblocks to help serve webhooks more reliably. If you have rules in place that only allow GitHub webhooks from our trusted addresses, you will need to update them.
This block of IPs has been in the /meta API endpoint since May 2018, but we wanted to announce this update in case you missed it.
Please contact us if you have any questions.