[nznog] Spam call from NZ number

Hey, I just got a spam call from a Wellington number (hilarious as it was a robot pretending to be The Australian NBN wanting to disconnect me, thanks NZ for trolling!). I suspect it’s a compromised serviced, but maybe just CLI overstamping. I’ve emailed the business concerned, but is there an easy way of figuring out the provider to alert them? Happy to provide number if someone can look it up. MMC