lodestone has a section specifically to report any ping or network issues via tracert and the IP address of FFXIV. So that's what I've been doing basically every day. Yes, I know it's most likely the NTT node (cause lul squeenix being cheap af like usual). It's listed all the way towards the bottom and a blue link that says FORM:

IP addresses for each of the physical data centers are as follows:
Japan: 119.252.37.58 (traceroute 119.252.37.58)
North America: 204.2.29.122 (traceroute 204.2.29.122)
Europe: 80.239.145.101 (traceroute 80.239.145.101)
Oceania: 153.254.80.65 (traceroute 153.254.80.65)

* The IP address of the European data center has been changed. (Updated on July 6, 2022)
* The IP address of the North America data center has been changed. (Updated on April 3, 2023)
* The IP address of the North Japanese data center has been changed. (Updated on January 15, 2024)

https://na.finalfantasyxiv.com/lodes...a451d5a8daa66f