I was doing some shopping for a trip to Hong Kong in may/june and since I've got plenty of free time these days, I thought I'd add an extra city with a free stopover (I've never booked a stopover before!).

I ran accross this in the rules for a $850 H fare SFO-HKG

---
A FREE STOPOVER IS PERMITTED WITHIN IATA-3 AND 2 ADDITIONAL STOPOVERS ARE PERMITTED, AT USD 100.00 EACH PER ADT AND USD 67.00 EACH PER CHD AND USD 10.00 EACH PER INF. APPLIES TO ROUNDTRIP ITINERARIES. *** THE FREE STOPOVER IS PERMITTED ANYWHERE EXCEPT HNL * WILL NOT AUTOPRICE EXCEPT IN AREA 3 ***.
---

I did some searching both on FT and on the web and could not find a listing for what cities/countries are in IATA-3, not even on the iata website!

Does anyone know where I can get such a listing?

Also, is there a limit to the amount of time on a stopover? I was hoping to spend an extra couple weeks in whatever city at which I end up stopping over.