Can NS records be IP addresses?

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Tags

1. #someone
2. #misconfiguration
3. #record
4. #records
5. #secondary
6. #point
7. #pretty
8. #addresses
9. #outside
10. #cname
11. #domain
12. #address
13. #hostnames
14. #servers
15. #doing
16. #pointing
17. #common
18. #putting
19. #reason
20. #might