Hello Don,
So the best way is to perhaps ask ICANN for these numbers in the aggregate in connection IDN TLDs. ICANN delays posting the monthly registry reports for a period of three months. Probably the best public resource is to use a site such as ntldstats and look at the size of the zone files in these TLDs which are generally accurate with a day or two. Note however these numbers only include domains in the zone file, but NOT the total in the authoritative database.
So I did some quick massaging of data available from ntldstats and my quick math shows 655,565 (CELL H95)second levels domains in IDN TLDs although a handful of these may be ascii, i.e NIC.IDN.
Hopefully this helps.
Best regards,
Michael
From: UA-discuss [mailto:ua-discuss-bounces@icann.org] On Behalf Of Don Hollander
Sent: Monday, January 15, 2018 11:11 PM
To: Universal Acceptance <ua-discuss@icann.org>
Subject: [UA-discuss] Is there anywhere that lists the number of IDNs registered? Or names registered in IDN TLDs? cc & g?
Don Hollander
Universal Acceptance Steering Group
Skype: don_hollander