Some are flat rates, others have different prices for peak vs. off-peak times. Calls within a state are, paradoxically, MORE expensive in general. 7.9 interstate no monthly fee. 6 second billing 6 second minimum. Intrastate rates not given.
Intrastate rates are higher.
MTX Communications 8.6 Flat Intrastate 6 second billing, fee not mentioned, intrastate rates not mentioned. Intrastate rates listed on page. Intrastate listed on web page. 6 second billing. Intrastate rates listed.