Running /etc/dns-floating-ip-updater.py on cloudcontrol1003 will output many warnings like these:
2018-11-13T15:05:00Z __main__ WARNING : Not handling 156.155.80.208.in-addr.arpa. because it doesn't end with 56.15.185.in-addr.arpa. 2018-11-13T15:05:00Z __main__ WARNING : Not handling 156.155.80.208.in-addr.arpa. because it doesn't end with 56.15.185.in-addr.arpa. 2018-11-13T15:05:00Z __main__ WARNING : Not handling 156.155.80.208.in-addr.arpa. because it doesn't end with 56.15.185.in-addr.arpa. 2018-11-13T15:05:00Z __main__ WARNING : Not handling 156.155.80.208.in-addr.arpa. because it doesn't end with 56.15.185.in-addr.arpa. 2018-11-13T15:05:00Z __main__ WARNING : Not handling 156.155.80.208.in-addr.arpa. because it doesn't end with 56.15.185.in-addr.arpa.
Practical impact is that reverse DNS entries for IPs in the 208.80.155 network are not created.