Dialing code 210 is an area code used in the Athens-Piraeus and Eleusis areas.

Acharnai
Aegaleo
Aghia Paraskevi
Aghia Varvara (of Athens)
Aghios Demetris
Aghios Ioannis Rentis/Rendis
Alimos
Amarousi
Ano Liosia
Aspropyrgos
Athens
Byronas or Vyronas
Chalandri
Chaidari
Cholargos (Cholargus)
Corydallos or Korydallos
Daphni
Ekali (Hecale)
Elliniko
Eleusis
Galatsi
Glyfada
Helioupoli
Kallithea some prefer Callithea
Kaisariani
Kamatero
Kifissia (Cephissia)
Korydallos
Lykovrissi
Magoula (of Eleusis)
Mandra
Maroussi
Moschato
Nea Smyrni (New Smyrna)
Neo Psychiko
New Chalkidonas (New Chalcedon)
New Erythraea/Erythraia
New Penteli
New Philadelphia
New Heraclion
Nikaia
Penteli
Perama (Piraeus)
Peristeri (Athens)
Petroupoli
Phaleron (Faliro)
Psychiko and New Psychiko
Salamis and the whole island communities
Southern Parnitha/Parnetha Ranges
Skaramangas
Tauros
Voula
Vouliagmeni:Vyronas or Byronas
Western Hymettus range
Zografou

See also: List of dialing codes in Greece alphabetically, Hellenic Telecommunication Organization (OTE)