Taking a look at the public status page, https://status.asm.saas.broadcom.com I’m getting a 404, so I can’t see if the IP addresses we use are being changed. The polling stations we use are Chyenne, San Antonio and Seattle if that helps.
The example link on the main Public Status Page was deprecated quite a while back but the link was never removed.
As for the IP's on the PSP pages, they don't recall them being there and if they were it was a very long time ago and have been removed since. There are no plans to put them back.