The Country Information element is shown below
Fig Courtesy: 802.11 Standard
where dot11OperatingClassesRequired is False and the First Channel Number/Operating Extension Identifier octet has a positive integer value of less than 201, then the Country Information element is shown as below
- Country String – indicates the country of operation. It also indicates Indoor/Outdoor operation (e.g – USI – US Indoor)
- First channel number – The starting channel supported by the device
- Number of channels – The number of channels supported by the current configuration
- Maximum Transmit Power Level – The Maximum power at which a packet can be transmitted
An example Wireshark capture is shown below
Country Element Subband triplet with operating Extension identifier > 201