Knowledgebase

Some applications or host providers might find it useful to know and whitelist RCS IP space. This page contains a list of resources that automate the discovery of all the IP space in the RCS network.

API URL

• CSV: https://geofeed.constant.com/

• Text Format: https://geofeed.constant.com/?text

• JSON Format: https://geofeed.constant.com/?json

• YAML Format: https://geofeed.constant.com/?yaml

API Output

The API provides a comma delimited lis (CSV) of IP subnets with this format:

• Subnet

• Location

• Region Code

• Region City

• Region Postal Code

Example Output

# Constant.com / rcs.is GeoFeed (AS20473) 

# Email: support@rcs.is 

# Last Updated: 2023-02-27 07:15:56 

45.32.0.0/21,US,US-NJ,Piscataway,08854

...