Yes, that's why I asked and strange, that DARC didn't add any comment
about them being just a declaration from one side and no source was given.

I got a clarification from Russia:
Unfortunately, the amateur radio movement has not existed in Russia 
since 2014, as the Union of Radio Amateurs of Russia ignored the 
incitement of interethnic hatred at 7,055 kHz. Being an SWL now is 
better than working on amateur radio because Russia's amateur radio 
movement has been broadcasting political propaganda on HAM bands since 
2014 and threatening physical violence and reprisals against those who 
disagree with these violations of amateur radio regulations and 
propaganda.
All these new prefixes are fiction
Mauno
Walter Salmaniw kirjoitti 19.3.2023 klo 19.46:

I'd be flabbergasted if they were, Mauno.  Talk about imperialism!  Walt
On Sun, Mar 19, 2023 at 11:44 AM Mauno_Ritola <Mauno.Ritola@gmail.com> 
wrote:
    Are these official: i.e. confirmed by IARU?
    DF5SX@darc.de kirjoitti 17.3.2023 klo 1.10:
    > RUSSIA   Russland erweitert eigenes Rufzeichensystem
    >
    >
    >
    > Russland hat sein eigenes Rufzeichensystem fuer Amateurfunkstellen
    > um die annektierten Gebiete in der Ukraine erweitert.
    >
    > Ab sofort werden die folgenden Praefixe verwendet:
    >
    >
    >
    > R1H, R1V  Gebiet Kherson (HE)
    >
    > R6K, R7K  Republik Krim (RK), bereits seit 21. Maerz 2014 verwendet
    >
    > R6O, R7O  Volksrepublik Donetsk (DO)
    >
    > R6R, R7R  Stadt Sevastopol (SE), bereits seit 21. Maerz 2014
    verwendet
    >
    > R6S, R7S  Gebiet Zaporizhia (ZP)
    >
    > R6Z, R7Z  Volksrepublik Luhansk (LU)
    >
    >
    >
    > Ueber diese Sachinformation berichtet das DARC-Auslandsreferat,
    >
    > ungeachtet der politischen Tragweite.
    >
    > (Auslandsreferat, DARC Deutschland-Rundspruch 11/2023, March 16)
    >
    > _
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    > http://www.hard-core-dx.com/
    > _______________________________________________
    >
    > THE INFORMATION IN THIS ARTICLE IS FREE. It may be copied,
    distributed
    > and/or modified under the conditions set down in the Design Science
    > License
    > published by Michael Stutz at
    > http://www.gnu.org/licenses/dsl.html
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