how to export contacts from an old Microsoft account in an iPhone to a new iPhone

I need to get contacts exported from an old contacts account I have in an iPhone. I had mail/contacts etc from company myaccount@ABC.com but that company no longer exists. I can no longer log on to it to be able to export them but the contacts still exist inside my phone.

I can see the contacts in my phone but I like to export them to either my new phone/account or to a csv file which I can then transfer to my phone.

I have other contact accounts but the one from that company which no longer exists has over 1000 contacts I like to keep. The phone in which I have them is to be decommissioned in just about 3 months.

Anything I can do?

[Re-Titled by Moderator]