I don't know if the city of Norwalk FD provides dispatch services for Rowayton FD however after checking the databases from: Federal Communications Commission (FCC) Home Page & Scanner Frequencies it appears that they both share the frequency: 33.86 MHz under the callsign: WZW969 for Norwalk & KCE670 for Rowayton. Rowaton FD is also licensed for the following additional frequencies under the callsign: KCE670