The definitive list can be found at Unicode Character Code Charts; search the page for “CJK”.
The “East Asian Script” document does mention:
Blocks Containing Han Ideographs
Han ideographic characters are found in five main blocks of the Unicode Standard, as
shown in Table 18-1
Table 18-1. Blocks Containing Han Ideographs
Block Range Comment
CJK Unified Ideographs 4E00-9FFF Common
CJK Unified Ideographs Extension A 3400-4DBF Rare
CJK Unified Ideographs Extension B 20000-2A6DF Rare, historic
CJK Unified Ideographs Extension C 2A700–2B73F Rare, historic
CJK Unified Ideographs Extension D 2B740–2B81F Uncommon, some in current use
CJK Unified Ideographs Extension E 2B820–2CEAF Rare, historic
CJK Unified Ideographs Extension F 2CEB0–2EBEF Rare, historic
CJK Unified Ideographs Extension G 30000–3134F Rare, historic
CJK Unified Ideographs Extension H 31350–323AF Rare, historic
CJK Compatibility Ideographs F900-FAFF Duplicates, unifiable variants, corporate characters
CJK Compatibility Ideographs Supplement 2F800-2FA1F Unifiable variants
Note: this table is current as of Unicode 15.0. The block ranges can evolve over time: latest is in CJK Unified Ideographs.
There are also
CJK Radicals / Kangxi Radicals 2F00–2FDF
CJK Radicals Supplement 2E80–2EFF
which contain characters which may find their way into regular text, as well as
CJK Symbols and Punctuation 3000–303F
See also Wikipedia:
- CJK Unified Ideographs Extension A
- CJK Unified Ideographs Extension B
- CJK Unified Ideographs Extension C
- CJK Unified Ideographs Extension D
- CJK Unified Ideographs Extension E
- CJK Unified Ideographs Extension F (Unicode 10)
See also Unihan Database (which organizes information relating to the properties of CJK Unified Ideographs)