In some aspects, the disclosure is directed to methods and systems for protocol coexistence. Within a frequency band of a wireless local area network (WLAN), a device implemented for operation in at least a non-WLAN protocol can determine that the frequency band is quiet at a first time instance. The device can transmit a message in WLAN protocol responsive to the determination and prior to operation in the non-WLAN protocol within the frequency band. The message can have a receiver address other than an address belonging to other devices operating within the frequency band.