I receive emails from the government agency Tenancy Services about market rent statistics, and was curious about the historical market rent for my suburb.  They have a CSV with historical data (back to 1993) but the CSV does not have suburb names.  I emailed them the following query in November:

Hi Team
 
I’m looking at the Detailed Quarterly Report here https://www.tenancy.govt.nz/about-tenancy-services/data-and-statistics/rental-bond-data/ .  Where can I find the Location IDs referenced in the CSV file?
 
Cheers
Mike

The answer came back today (lucky I was not holding my breath!), and I thought to post it here in case anyone else is curious.  I've not followed their link and checked it works for myself yet.

Good morning Mike
 
I am writing further to our previous correspondence and your query about the Market Rent statistics. Please accept my sincere apologies for the long delay in response to you. 
 
We referred this request to our Head Office team who have confirmed that you can the search the Location IDs at Data Table | Statistical Area 2 2019 (generalised) | Stats NZ Geographic Data Service, under the 'Data Table' tab. If you enter the Location ID in the search box and press enter, a result will generate to show which location is referenced. 
 
The Market Rent report uses the Statistical Area 2-2019 area definitions from Statistics NZ (at the link above). Our Head Office Team is following up with Statistics NZ to check if when more recent definitions will be available.