820-280 phone numbers

Numbers 820-280-0000 to 820-280-9999 are assigned to Hd Carrier LLC in Los Alamos, CA. 6 of its ten thousand-number blocks are assigned to other carriers (number pooling).

Not assigned to any carrier: 820-280-3xxx, 820-280-4xxx, 820-280-5xxx — calls from these use spoofed caller IDs.

Source: North American Numbering Plan Administrator, Nov 3, 2026. Numbers can move between carriers.

Reported numbers in 820-280