This page lists every known solution for the clue “Serial Number” in Crossword Challenge. Because this clue can appear in different puzzles (levels) with different required answers, we first list all the answers, then show which one appears in each puzzle below.
Serial Number Crossword Challenge Answers (All Variants)
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If more than one answer is listed, open your puzzle page below to confirm the one used there.
All Known Answers for Serial Number Clue
Puzzle 252 — - Puzzle 386 —
- Puzzle 691 —
Where This Clue Appears
Last Checked: September 12, 2025