Firewall Information and IP Address Ranges
packagecloud.io supports both IPv4 and IPv6 via Amazon AWS.
Our IP addresses can change dynamically due to AWS autoscalers, so we recommend you configure your systems to obey the TTLs of our DNS records.
If you are using hostname-based Firewall rules, these are all the hostnames you will need to whitelist.
packagecloud.io uses CloudFront to cache package objects. You may need to whitelist CloudFront's IP Range if you are behind a Firewall.
You can find information about CloudFront's public IP list here