In the aviation industry, a flight number or flight designator is a code for an airline service consisting of two-character airline designator and a 1 to 4 digit number.
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| Wikidata property | P3090 | |
| Regular expression | ([A-Z]{2,3}|[A-Z][0-9]|[0-9][A-Z])\d{1,4}[A-Z]?|\d{1,4} | |
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