Numbered Tag
Numbered Ticket
noun
You know 番号 means "number" so add a tag to it and you have a numbered tag.
ばんごうふだ
This is a jukugo word (番号) with a single-word kanji added. That means you have two on'yomi readings from the jukugo word and the kun'yomi reading from the single kanji (ふだ). Put them all together and you have the reading of this kanji!
番号札をとって、お待ちください。
Please take a numbered ticket and wait your turn.
すみません、この辺りに番号札は落ちていませんでしたか？
Excuse me, wasn't there a number tag left around here?
こちらがお客様のお荷物の番号札となります。
Here is the numbered tag for your luggage.