I think I'm correct in saying that the '##' means it's operated by another carrier, but for some reason KVS cannot display it.
According to itasoftware the other carrier is LAN Peru. Therefore the flight would be allowed on an xONEx itinerary.
It's a 4x/week service with a stop in LIM:
[KVS Availability Tool 6.2.0.R2/Diamond - Amadeus: Timetable/NL-BCDF]
Code:
LAX Los Angeles Intl CA US [KLAX]
EZE Buenos Aires Ministro Pistarini BA AR [SAEZ]
MON 29 Aug 2011 - 05 Sep 2011
Carrier Flight From Depart To Arrive A/C St Frequency | Dur'n | Dep T | Arr T | Effect | Ending | Exceptions
--------- ------ ---- -------- ---- -------- --- -- ----------------------------------------------------------------
LA/## 2605 LAX 21:10 EZE 15:15 +1 763 1 123---7 14:05 B - 03 Jul 02 Oct