Quote:
Originally Posted by dg7feq
The number range (423-662) that UM/Riiing is using are used as a premium service in Liechtenstein as well (Teleshop, dialers, etc). Thats why for example german providers charge about 30ct more for caling UM numbers than other Liechtenstein Networks.
Therefor premium rate is at least valid for UM
Chris 
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UM range is 423 663 not 423 662 (or, is it your typo?).
Anyway, what are regulations for international pricing premium rate numbers? Any ITU document or something?