Can't access or use Zapier with other apps

Zapier does not have one static range of IP addresses. Instead, Zapier uses ​Amazon (AWS)'s US-EAST-1 region, spinning up instances as needed. This means there could be millions of IPs to allowlist, which often becomes impractical.

You can find Amazon's list of current ranges (subject to change) here. We might be connecting from any of the us-east-1 ranges listed on this page: https://ip-ranges.amazonaws.com/ip-ranges.json.

In most cases, allowing all of us-east-1 is not going to be the right solution. You'll need to open your instance to the wider internet.