Effective from June 14, 2002, the new Numbering Plan will ensure the
implementation of the emergency numbers and the short numbers,
harmonized at the European level.

As a summary:

Instead of +4 0AA XXX XXXX now will be +4 0ZAA XXX XXXX, for instance for an old Bucharest number +4 01 1234567 now you will have to dial +4 021 1234567 and for a number from Satu Mare, let’s say +4 061 770073 now you will have to dial +4 0261 770073.

The mobile phone numbering changes as follows:

Orange: ( the first nine get’s replaced with 74 )

+4 090 xxx xxx -> +4 0740 xxx xxx 
+4 094 xxx xxx -> +4 0744 xxx xxx 
+4 095 xxx xxx -> +4 0745 xxx xxx 

Connex: ( the first nine get’s replaced with 72 )

+4 091 xxx xxx -> +4 0721 xxx xxx 
+4 092 xxx xxx -> +4 0722 xxx xxx 
+4 093 xxx xxx -> +4 0723 xxx xxx 

Cosmorom: ( the first nine get’s replaced with 76 )

+4 096 xxx xxx -> +4 0766 xxx xxx 

Telemobil: ( the first nine get’s replaced with 78 )

+4 098 xxx xxx -> +4 0788 xxx xxx 

Conform to their document
after September 14, 2002 you will not be able to use the old numbers,
but better get used to the new ones since AFAIK since June 14 there
where already problems with the old ones, beside that the telecom chick
which announces the changes has very very bad English.

This is especially important for those who plan to attend the ICAN meeting from June, which will be held in Bucharest, Romania.