cbr79 ~ third party contacts
🛑 Don't be in a hurry to remove your gmail contacts , it's likely that you will
need them to merge , export or if you are using both accounts .
I noticed underneath your post that you have an iPad ? You may need that
too , some tasks can't be done on an iPhone .
CONTACTS / ICLOUD.COM
If you want to access your contacts on iCloud.com, use a tablet or computer. You can’t use Contacts on iCloud.com on a phone.
You can also access contacts stored in iCloud on any device that has Contacts turned on in iCloud settings.
⭐️ Manage and delete contacts on your iPhone or iPad - Apple Support ⭐️
CardDAV
vCard Extensions to WebDAV is an address book client/server protocol designed to allow users to access and share contact data on a server. The CardDAV protocol was developed by the IETF and was published as RFC 6352 in August 2011. CardDAV is based on WebDAV, which is based on HTTP, and it uses vCard for contact data.Wikipedia
OSI layer:
Application
Port(s):
80, 443
RFC(s):
RFC 6352