No. Calls using the 800, 888, 877, 866, 855, 844, and 833 Numbering Plan Areas (NPAs) are all Toll-Free calls. However, callers should be aware that 800, 888, 877, 866, 855, 844, and 833 Toll-Free Numbers (TFNs) are not interchangeable as they are likely to be used by different subscribers.