how i can check last dialled numbers on my iphone?

I currently have 76 recent calls included with my Recents list with some of the recents including a number of calls with a (2) or (3), etc., so I don't believe the Recents list is limited to 50.

If not available in the Recents list, it isn't available.

As already provided - check your online account with your carrier. Your carrier has a history of all calls received and placed. I can view this online with my AT&T account if needed - the detail for every received and placed call is included with each month's bill - the number, date and time of the call, and for how many minutes for each call.

It should be. When selecting Call for a number and the number starts ringing, the clock has started for being charged for that call. The clock doesn't start when the recipient answers the call as when dialing long distance with a landline.

There is only one way to know and determine this for certain with your carrier and if your carrier includes such detailed info with your account - checking your online account with your carrier.

Recents... outgoing are black, incoming are red.

Message was edited by: paulcb

Tap the arrow beside each recent call and look at the times for each one. The first one listed is the most recent.

but this number is already out of list

...then there's no way to retrieve it from your iPhone. Check your online account with your carrier.

No.