← Area code 618
618-725 phone numbers
Numbers 618-725-0000 to 618-725-9999 are assigned to T-Mobile USA, Inc. in Vandalia, IL. 7 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 618-725-8xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.