620-536 phone numbers

Numbers 620-536-0000 to 620-536-9999 are assigned to Onvoy, LLC in Windom, KS. 2 of its ten thousand-number blocks are assigned to other carriers (number pooling).

Not assigned to any carrier: 620-536-2xxx, 620-536-3xxx, 620-536-4xxx — calls from these use spoofed caller IDs.

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

Reported numbers in 620-536