Is current reservation available for all trains?

Related questions

1. What is PNR number in Irctc?
2. When current reservation opens in Irctc?
3. What is CNF probability in Irctc app?
4. Will PQWL 1 get confirmed?
5. What is Irctc ID?
6. What is the time of railway ticket booking online?
7. What is Curr_avbl?
8. How can I verify my Irctc account?
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Tags

1. #seats
2. #bookings
3. #travel
4. #source
5. #irrespective
6. #trains
7. #remains
8. #current
9. #subject
10. #after
11. #berths
12. #facility
13. #prior
14. #train
15. #starting
16. #availability
17. #offer
18. #booking
19. #accommodation
20. #charting
21. #vacant
22. #reserved
23. #class
24. #minutes