We are using several servers to process your cronjobs. FastCron will prioritize IPv4 over IPv6 to connect to your websites.
If you're having problems with connections or firewalls, please add these IP addresses to your whitelist:
| IPv4 | IPv6 |
|---|---|
| 159.223.144.10 | 2604:a880:400:d0::33:f001 |
| 143.244.166.206 | 2604:a880:400:d0::25cb:b001 |
| 147.182.184.93 | 2604:a880:400:d0::18f1:f001 |
| 45.76.15.62 | 2001:19f0:0000:36ab:5400:05ff:fefd:4ab0 |
| 207.148.20.106 | 2001:19f0:0000:36cb:5400:05ff:fefd:4b1e |
Our CIDR (for whitelisting IPv6 addresses at Cloudflare):
You can programmatic fetch the full list of IP addresses at https://www.fastcron.com/ip.json.
If you want to receive email notifications when we update our IP addresses, please log in to FastCron, click your avatar > My Profile, check the box Receive email notifications about FastCron IP change.
See How to whitelist FastCron IP addresses at Cloudflare.
Need help? Reach out to support@fastcron.com - we're happy to help.
See why 8,000+ website developers and their teams use FastCron to run their cronjobs 12 million times a day.
The reliable online cronjob service for your websites since 2009.