Does Cronofy provide fixed IP addresses for calendar service traffic?

Cronofy uses fixed IP address when communicating with calendar servers according to the data center the calendar service is connected to.

Your application vendor will be able to tell you which data center applies to your integration so that you can set your firewall rules accordingly.

Fixed IPs are provided for two classes of traffic:

• From Cronofy to external servers

  These are the IP addresses from which Cronofy will be making requests to get events, create subscriptions, executing a callback/webhook request etc.

• From on-premise Exchange servers to Cronofy

  These are the IP addresses we accept requests from your on-premise Exchange server for callbacks regarding event updates, for example.

All other traffic to Cronofy, including browser-based requests and calls to our API, does not guarantee a fixed set of IPs.

Please note that our Exchange connection utilizes Exchange Web Services API, which means that our services also require HTTPS (TCP, port 443) access to the Exchange Services API endpoint.

AU 🇦🇺 #

From Cronofy to external servers #

3.25.23.200
13.237.176.113
52.65.115.90

From on-premise Exchange servers to Cronofy #

3.25.14.85
3.104.140.2
52.62.73.14
52.63.134.200
54.153.220.140
54.253.225.107

CA 🇨🇦 #

From Cronofy to external servers #

3.96.180.108
15.223.18.65
52.60.165.95

From on-premise Exchange servers to Cronofy #

3.98.113.81
3.98.167.125
3.98.207.71
15.223.98.215
52.60.61.171
99.79.186.248

DE 🇩🇪 #

From Cronofy to external servers #

3.121.21.226
3.122.2.191
54.93.34.174

From on-premise Exchange servers to Cronofy #

3.64.199.209
3.66.76.219
3.67.141.202
3.69.39.26
3.69.42.40
18.159.56.10

SG 🇸🇬 #

From Cronofy to external servers #

3.1.198.160
18.138.191.98
18.141.108.139

From on-premise Exchange servers to Cronofy #

3.1.119.183
13.213.190.54
13.213.213.63
13.228.90.196
18.138.79.7
54.254.92.125

UK 🇬🇧 #

From Cronofy to external servers #

18.130.26.5
18.132.99.184
18.135.56.192

From on-premise Exchange servers to Cronofy #

3.8.110.75
18.130.20.144
18.135.60.194
18.169.82.247
18.169.223.210
35.177.97.204

US 🇺🇸 #

From Cronofy to external servers #

3.92.86.8
3.93.102.137
3.93.204.184

From on-premise Exchange servers to Cronofy #

3.208.225.52
3.212.10.178
23.21.190.102
34.196.165.108
44.195.100.134
54.174.39.119