phone number vs signaling

phone number and signaling both are nouns.

Word	Noun	Adjective	Verb	Adverb
phone number	Yes	No	No	No
signaling	Yes	No	No	No

As nouns, signaling is a hypernym of phone number; that is, signaling is a word with a broader meaning than phone number:

Other hypernyms of phone number include sign, signal, signalling.

phone number (noun)	signaling (noun)
the number is used in calling a particular telephone	any nonverbal action or gesture that encodes a message