Also I'm not sure what effect that will have for Chinese users. It might make many of their URLs look strange to them.
See: https://www.reddit.com/r/firefox/comments/7ul9p3/why_is_netw...
There are tons. One prominent email provider is a three-digit number. There's a job board at 51job.com.
(What's 51job? Read in Mandarin, that would be "wǔ yāo job" [five one "job" (the English word)]. This is felt to sound similar to "wǒ yào job" 我要job [I want a job].)
幺 yāo is a common word for 1 when vocalizing a stream of digits. (Such as a phone number / credit card number / account number / etc.) I am told that this originated as a way to easily distinguish 1 from 7 (七 qī) when communicating over a low-quality connection. In the presence of static, yi and qi could sound similar.
CC-CEDICT has a good gloss ( https://www.mdbg.net/chinese/dictionary?page=worddict&wdrst=... ):
> one (unambiguous spoken form when spelling out numbers, esp. on telephone or in military)
None of them seem worth phishing for. In some cases when you google the site name, google will show results from sitename.tld and when you visit the site with the show_punycode true, it will actually load pages from the xn-- equivalent. So it looks like the "original" domain isn't even indexed or online at all.
In another case both the xn-- and "normal" domain sit side by side on the same server. I guess there's no harm in posting these:
cadzandie.be and xn--cadzandi-01a.be. Note there's no ë in the first domain
Another strange one is
xn--rembours-i1a.be
When you type in remboursé.be it actually redirects (?) to the xn-- equivalent.
I'm fascinated but having a hard time seeing sense in this.
Test with the fake Apple domain https://www.xn--80ak6aa92e.com/ .
See "Phishing with Unicode Domains" for more information: https://www.xudongz.com/blog/2017/idn-phishing/ .