noun
Refers to a person stationed at an entrance to greet visitors, control access, or handle luggage, typically in hotels, large buildings, or traditional establishments.
ホテルの玄関番が荷物を運んでくれた。
The hotel porter carried my luggage for me.
玄関番が来
The doorman showed the visitor to the reception room.
受付 is a receptionist or reception desk, often inside a building, whereas 玄関番 is specifically stationed at the entrance.
Compound of 玄関 (entrance) and 番 (watch, duty), literally 'entrance duty person'.