Devanagari Extended

Block from U+A8E0 to U+A8FF. This block was introduced in Unicode version 5.2 (2009). It contains 32 codepoints.

The Wikipedia provides the following information on block Devanagari Extended:

Devanagari Extended is a Unicode block containing cantilation marks for writing the Samaveda, and nasalization marks for the Devanagari script.

Chart at Unicode.org (PDF)
Block at Decode Unicode

1. Combining Devanagari Digit Zero
2. Combining Devanagari Digit One
3. Combining Devanagari Digit Two
4. Combining Devanagari Digit Three
5. Combining Devanagari Digit Four
6. Combining Devanagari Digit Five
7. Combining Devanagari Digit Six
8. Combining Devanagari Digit Seven
9. Combining Devanagari Digit Eight
10. Combining Devanagari Digit Nine
11. Combining Devanagari Letter A
12. Combining Devanagari Letter U
13. Combining Devanagari Letter Ka
14. Combining Devanagari Letter Na
15. Combining Devanagari Letter Pa
16. Combining Devanagari Letter Ra
17. Combining Devanagari Letter Vi
18. Combining Devanagari Sign Avagraha
19. Devanagari Sign Spacing Candrabindu
20. Devanagari Sign Candrabindu Virama
21. Devanagari Sign Double Candrabindu Virama
22. Devanagari Sign Candrabindu Two
23. Devanagari Sign Candrabindu Three
24. Devanagari Sign Candrabindu Avagraha
25. Devanagari Sign Pushpika
26. Devanagari Gap Filler
27. Devanagari Caret
28. Devanagari Headstroke
29. Devanagari Sign Siddham
30. Devanagari Jain Om
31. Devanagari Letter Ay
32. Devanagari Vowel Sign Ay