Replacing the now defunct BGPmon. BGPalerter is an opensource NodeJS tool to monitor network prefixes and ASN using RIPE's RIS Live.
Tracking task: https://phabricator.wikimedia.org/T230600
Relevant CRs (there are more): https://gerrit.wikimedia.org/r/q/topic:bgpalerter
Most of the configuration is done in: https://gerrit.wikimedia.org/r/plugins/gitiles/operations/puppet/+/refs/heads/production/hieradata/role/common/rpkivalidator.yaml
Especially the contacts to email if an issue is found.
Monitored prefixed are pulled from data.yaml
The daemon needs proxy access to reach the RIPE's RIS Live. It's also monitored using the generic Icinga systemd service check.
More recently there is an hosted version available on https://packetvis.com/#/home (contact me if you want to be added to the Wikimedia org)