noun
telecommunications company; telco
Refers to a company that provides telephone or telecommunications services. The term is straightforward and widely understood.
新しい電話会社に乗り換えた。
I switched to a new telecommunications company.
電話会社の料金プランを比較する。
Compare the rate plans of telephone companies.
Compound of 電話 (telephone) + 会社 (company). A straightforward modern term with no obscure historical derivation.