Query Route53 for a zone's limit on records

The default limit for the number of records in a hosted zone is 10,000. I can open a support ticket to request an increase on a specific zone in increments of 10k, and there are costs associated with that. My business has done this a number of times in the past, over a few zones.

Other than looking back at support cases, is there any way to find the current limit for a given hosted zone? The Service Quotas page shows "Not Available" under "Applied Quota Value," presumably because each zone is actually set individually.