The list below is what I have observed and logged over the past four years. I have none logged on 4.557 to 4.558MHz due to excessive interference here on that frequency:
July 2017 to November 2021:1259z 3.594.1MHz CW "A" Astrakhan, Volga River 419 report.
1215z 3.594.2MHz CW "F" Vladivostok, Sea of Japan, Russian Far East 519 report.
1705z 3.657.0MHz CW "V" Khiva, Xorazm, Uzbekistan. 529 report.
1645z 3.227.0MHz CW "V" Khiva, Xorazm, Uzbekistan. 559 report.
1620z 4.338.0MHz CW "V" Khiva, Xorazm, Uzbekistan. 539 report.
1744z 4.977.0MHz CW "V" Khiva, Xorazm, Uzebkistan. 419 report.
1355z 5.094.0MHz CW "K" Khiva, Xorazm, Uzbekistan 539 report.
1629z 5.153.7MHz CW "D" Sevastapol, Black Sea. 519 report.
1322z 5.153.8MHz CW "P" Kaliningrad, Baltic Sea 419 report.
1103z 5.153.9MHz CW "S" Severomorsk, Kola Bay, Murmansk. 419 report.
1333z 5.154.1MHz CW "A" Astrakhan, Volga River 419 report.
1055z 5.154.2MHz CW "F" Vladivostok, Sea of Japan. 539 report.
1646z 5.154.4MHz CW "M" Magadan, Sea of Okhotsk, Far East 419 report.
1244z 5.156.8MHz CW "L" St Petersburg, Baltic Sea & Neva River 519 report.
1045z 5.342.0MHz CW "V" Khiva, Xorazm, Uzbekistan 579 report.
1505z 5.590.0MHz CW "V" Khiva, Xorazm, Uzbekistan. 529 report.
1449z 5.621.0MHz CW "V" Khiva, Xorazm, Uzbekistan, unpublished frequency so maybe not Khiva? 319 report.
0955z 7.039.2MHz CW "F" Vladivostok, Far East, Sea of Japan. 419 report.
0745z 7.039.3MHz CW "K" Petropavlovsk, Kamchatskiy, Kamchathka, Bering Sea. 519 report.
1302z 7.039.4MHz CW "M" Magadan, Sea of Okhotsk, Russian Far East 419 report.
1644z 7.509.1MHz CW "A" Astrakhan,Volga River, 539 report.
1429z 7.508.7MHz CW "D" Sevastapol, Black Sea. 519 report.
1304z 7.508.8MHz CW "P" Kaliningrad, Baltic Sea 419 report.
1646z 7.508.9MHz CW "S" Severomorsk, Kola Bay, Murmansk region, 529 report.
1033z 7.611.0MHz CW "V" Khiva, Xorazm, Uzbekistan. 319 report.
1016z 8.494.9MHz CW "S" Severomorsk, Kola Bay, Murmansk 529 report.
1425z 8.494.8MHz CW "P" Kaliningrad, Baltic Sea. 519 report.
0911z 8.495.0MHz CW "C" Moscow 519 report.
1557z 8.495.1MHz CW "A" Astrakhan, Volga River 589 report.
1037z 8.495.2MHz CW "F" Vladisvostok, Far East, Sea of Japan 529 report.
1620z 8.495.3MHz CW "K" Petropavlovsk, Kamchatskiy, Kamchathka, Bering Sea 319 report.
1122z 8.495.4MHz CW "M" Magadan, Sea of Okhotsk, Far East 319 report.
1000z 8.497.8MHz CW "L" St Petersburg, Baltic Sea & Neva River. 539 report.
0909z 10.871.7MHz CW "D" Sevastapol, Black Sea 429 report.
1000z 10.871.8MHz CW "P" Kaliningrad, Baltic Sea 419 report.
0950z 10.871.9MHz CW "S" Severomorsk, 319 report.
0933z 10.872.0MHz CW "C" Moscow, 529 report.
1000z 10.872.1MHz CW "A" Astrakhan, Volga River 519 report.
0832z 10.872.2MHz CW "F" Vladivostok, Russian Far East, Sea of Japan 529 report.
0955z 10.872.3MHz CW "K" Petropavlovsk. Kamchatka, Bering Sea. 519 report.
0836z 10.872.4MHz CW "M" Magadan, Sea of Okhotsk, Far East 519 report.
1422z 13.528.0MHz CW "C" Moscow, 519 report.
1310z 13.528.1MHz CW "A" Astrakhan, Volga River 529 report.
1000z 13.528.2MHz CW "F" Vladivostok, Sea of Japan 529 report.
1000z 13.528.3MHz CW "K" Petropavlovsk. Kamchatka, Bering Sea 559 report.
0856z 13.528.4MHz CW "M" Magadan, Sea of Okhotsk, Far East 539 report.
0842z 13.527.7MHz CW "D" Sevastapol, Black Sea 419 report.
0855z 13.527.8MHz CW "P" Kaliningrad, Baltic Sea 319 report.
1017z 13.527.9MHz CW "S" Severomorsk, Kola Bay, Murmansk 519 report.
0610z 16.332.4MHz CW "M" Magadan, Sea of Okhotsk, Russian Far East. 559 report.
0330z 16.332.3MHz CW "K" Petropavlovsk, Kamchatka, Bering Sea 519 report.
0845z 16.332.2MHz CW "F" Vladivostok, Far East, Sea of Japan. 559 report.
0955z 16.332.1MHz CW "A" Astrakhan, Volga River. 419 report.
1000z 16.331.9MHz CW "S" Sevromorsk, Kola Bay, Murmansk. 519 report.
1037z 16.331.8MHz CW "P" Kaliningrad 519 report.
0534z 16.331.7MHz CW "D" Sevastapol, Black Sea. 319 report.
0315z 20.048.3MHz CW "K" Petropavlovsk 519 report.
1039z 20.048.2MHz CW "F" Vladivostok, Sea of Japan. 539 report.
0930z 20.048.1MHz CW "A" Astrakhan, Volga River 529 report.
0755z 20.048.0MHz CW "C" Moscow. 419 report.
0810z 20.047.9MHz CW "S" Severomorsk, Kola Bay, Murmansk. 519 report.
1145z 20.047.8MHz CW "P" Kaliningrad. 529 report.
1102z 20.047.7MHz CW "D" Sevastapol, Black Sea. 419 report.
Former USSR channel marker/beacon stations:B Arkhangelsk
C Moscow
F Gdynia (Poland)
H Unknown
O Moscow
P Kaliningrad
R Izhevsk
S Arkhangelsk
T Unknown
U Kholmsk
W Havana (Cuba)
X Prague (Czech)
All of the above have virtually closed down since the demise of the former USSR, or maybe they are just "sleeping"?
Due to excessive noise on higher end of 4MHz no 4.557-4.558MHz beacons logged.
List updated 16th November 2021.