How long does reverse DNS take to propagate?

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Tags

1. #reverse
2. #waited
3. #there
4. #propagation
5. #server
6. #people
7. #changes
8. #involved
9. #usually
10. #however
11. #those
12. #longer
13. #takes
14. #servers
15. #occur
16. #delay
17. #delegation
18. #change
19. #hours