| Rf(A): | Novaya Zemlya and Franz-Joseph Land |
| Rf(C): | C. European Russia, comprising Kostroma, Tver, Yaroslavl, Vladimir, Nizhniy Novgorod, Smolensk, Moscow, Ryazan, Mordovia, Chuvashia, Ulyanovsk, Kaluga, Tula, Lipetsk, Tambov, Penza, Bryansk, Orlov, Kursk, Voronezh, Belgorod |
| Rf(CS): | Russian Caucasia |
| Rf(E): | E. European Russia, comprising Vyatka, Perm, Udmurtia, Bashkortostan, Tatarstan, Samara, Orenburg |
| Rf(K): | Kaliningrad Region |
| Rf(N): | N. European Russia, comprising Arkhangelskaya, Karelia, Komi, Murmansk, Vologda |
| Rf(NW): | Northwest European Russia, comprising Novgorod, Pskov, St Petersburg |
| Rf(S): | S. European Russia, comprising Saratov, Volgograd, Astrakhan, Rostov, Kalmykiya) |
|