As reported by other players, I'm also suffering from high ping exclusively on Final Fantasy XIV to the Chaos Data Center, around an average of 125ms~.

I've talked to Square Enix support who instructed me to post about this issue on the forums. I've also already tried to talk to my ISP who'se answer was that the problem was not on their side, so that's why I'm following the support suggestion on posting here.

A trace route seems to reveal there is a problem in the path to the server:
1 1 ms 1 ms 1 ms NOSDRIVE [192.168.1.1]
2 * * * Request timed out.
3 10 ms 11 ms 11 ms 10.137.197.161
4 12 ms 11 ms 8 ms 10.255.48.86
5 26 ms 30 ms 26 ms ix-ae-3-0.tcore1.pv9-lisbon.as6453.net [195.219.185.29]
6 108 ms 106 ms 105 ms if-ae-1-3.tcore1.sv8-highbridge.as6453.net [80.231.158.30]
7 107 ms 106 ms 107 ms if-ae-2-2.tcore2.sv8-highbridge.as6453.net [80.231.139.1]
8 * * * Request timed out.
9 107 ms 112 ms 106 ms if-ae-66-7.tcore3.nto-newyork.as6453.net [80.231.130.23]
10 106 ms 106 ms 107 ms 63.243.186.19
11 110 ms 108 ms 106 ms nyk-bb2-link.ip.twelve99.net [62.115.135.132]
12 115 ms 114 ms 114 ms ldn-bb1-link.ip.twelve99.net [62.115.113.21]
13 116 ms 117 ms 117 ms prs-bb1-link.ip.twelve99.net [62.115.135.25]
14 124 ms * 125 ms ffm-bb1-link.ip.twelve99.net [62.115.123.12]
15 126 ms 123 ms 122 ms ffm-b10-link.ip.twelve99.net [62.115.137.227]
16 123 ms 123 ms 123 ms kddi-ic301630-ffm-b10.ip.twelve99-cust.net [62.115.32.110]
17 124 ms 123 ms 123 ms 195.82.60.29
18 143 ms 125 ms 123 ms 195.82.61.14
19 * 1325 ms 1359 ms 195.82.50.230
20 125 ms 124 ms 122 ms 195.82.50.9

Trace complete.

As you can see, for some reason, the connection is going through New York and there's no reason for that, since I'm in Portugal connecting to a server in Germany.

To provide answer to questions I've seen previously asked:
- Are you using a wired or wireless connection?
I'm using a wired connection.
- Do you have any firewalls or anti-virus software installed on the machine if are using a Mac or Windows PC? If so, which ones do you have installed?
None other than Windows Defender, which I've already tried to disable and also allow Final Fantasy to bypass. Since the question is asked about Mac and PC, I will add that the problem also happens in Playstation, so it's not related to that.
- Internet Service Provider
NOS Portugal.
- Location/Region you are in (Not in game, your actual location)
Portugal
- Does any specific error message/code occur when the issue happens?
No.
- Does the issue only happen with one specific character or time frame? Please clarify.
No. All character and consistent all day and have been through quite some time, according to feedback from other players I've seen on portuguese boards.