← Area code 541
541-400 phone numbers
Numbers 541-400-0000 to 541-400-9999 are assigned to T-Mobile USA, Inc. in Hood River, OR. 4 of its ten thousand-number blocks are assigned to other carriers (number pooling).
Not assigned to any carrier: 541-400-3xxx, 541-400-5xxx, 541-400-6xxx — calls from these use spoofed caller IDs.
Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.