Hydra’s telephone exchange is 22980 and must be included when dialing any island landline. Numbers beginning “69#” indicate cell or mobile phones and may incur a higher charge, particularly if you are calling from a mobile phone.
Emergency
Hydra Emergency & Rescue: 199
International Emergency & Rescue: 112
Hydra Fire Department: 22980 53199
Municipal
Police: 22980-52205 Port Authority: 22980-52279 Post Office: 22980-52262 Town Hall: 22980-52210, 53003