Nuclear submarines in the Russian Navy. from the oldest to the youngest.
1980s
1. BS-136 "Orenburg" (Project 09786), active from November 30, 1981; 40 years, 11 months, 26 days
2. TK-208 "Dmitry Donskoy" (Project 941UM), active from December 29, 1981 ; 40 years, 10 months, 27 days
3. K-44 "Ryazan" (project 667 BDR), active from September 17, 1982; 40 years, 2 months, 8 days
4. K-51 "Verkhoturye" (667 BDRM), active from 28.12.1984; 37 years, 10 months, 28 days
5. BS-64 "Podmoskovye" (Project 09787), active from 23.12.1986; 35 years, 11 months, 2 days
6. K-114 "Tula" (Project 667BDRM); active from 30.10.1987; 35 years, 26 days
7. K-117 "Bryansk" (project 667 BDRM); active from 30.09.1988; 34 years, 1 month, 26 days
8. K-132 "Irkutsk" (Project 949AM), active from 30.12.1988; 33 years, 10 months, 26 days
9. K-18 "Karelia" (Project 667BDRM); active from 10.10.1989; 33 years, 1 month, 15 days
1990s
10. K-407 "Novomoskovsk" (Project 667 BDRM), active from 27.11.1990; 32 years, 4 days
11. K-410 "Smolensk" (Project 949A), active from 22.12.1990; 31 years, 10 months, 3 days
12. K-331 "ex-Magadan" (Project 971), active from 23.12.1990; 31 years, 11 months, 2 days
13. B-534 "Nizhny Novgorod" (Project 945A), active from 26.12.1990; 31 years, 10 months, 30 days
14. K-317 "Pantera" (Project 971), active from 27.12.1990, 31 years, 10 months, 29 days
15. K-442 "Chelyabinsk" (Project 949AM), active from 29.12.1990, 31 years, 10 months, 27 days
17. B-138 "Obninsk" (Project 671 RTMK), active from 30.12.1990, 31 years, 10 months, 26 days
16. K-461 "Volk" (971M), active from 29.12.1991; 30 years, 10 months, 27 days
18. K-456 "Tver" (949A), active from 18.08.1992; 30 years, 3 months, 7 days
19. B-448 "Tambov" (Project 671 RTMK), active from 24.09.1992; 30 years, 2 months, 1 day
20. K-328 "Leopard" (971M), active from 30.12.1992; 29 years, 10 months, 26 days
21. K-266 "Orel" (949A), active from 30.12.1992; 29 years, 10 months, 26 days
22. K-419 "Kuzbass" (971U), active from 31.12.1992; 29 years, 10 months, 25 days
23. K-186 "Omsk" (949A), active from 15.12.1993; 28 years, 11 months, 10 days
24. B-336 "Pskov" (945A), active from 17.12.1993; 28 years, 11 months, 12 days
25. K-154 "Tigr" (971; under repair and modernization), active from 29.12.1993; 28 years, 10 months, 27 days
26. K-295 "Samara" (971M), active from 17.07.1995; 27 years, 4 months, 8 days
27. K-157 "Vepr" (971U); active from 25.11.1995; 27 years (BIRTHDAY)
28. K-150 "Tomsk" (949A); active from 25 years, 10 months, 26 days
2000s
29. K-335 "Gepard" (971U), active from 05.12.2001; 20 years, 11 months, 20 days
2010S
30. K-535 "Yuri Dolgorukiy" (955), active from 29.12.2012; 9 years, 10 months, 27 days
31. K-550 "Alexander Nevsky" (955), active from 23.12.2013; 8 years, 11 months, 2 days
32. K-560 "Severodvinsk" (885), active from 30.12.2013; 8 years, 10 months, 26 days
33. K-551 "Vladimir Monomakh" (955), active from 19.12.2014; 7 years, 11 months, 6 days
2020s
34. K-552 "Knyaz Vladimir" (955A), active from 12.06.2020; 2 years, 5 months, 13 days
35, K-561 "Kazan" (885M), active 05.05.2021; 1 year, 6 months, 20 days
36. K-552 "Knyaz Oleg" (955A), active from 21.12.2021; 11 months, 4 days
37. K-573 "Novosibirsk" (885M); active from 21.12.2021; 11 months, 4 days
38. K-329 "Belgorod" (09852), active from 08.07.2022; 4 months, 17 days
39. K-553 "Generalissimus Suvorov" (955A), will enter active service soon..
40. K-571 "Krasnoyarsk" (885M), will enter active service soon..
I did not include two more titanium submarines of project 945 "Barracuda" in the list because their status is unknown and K-152 "Nerpa" (971I).