| Area Code▲ | City↕ | Administrative Region↕ | City Population↕ | Country/Region | Timezone |
|---|
| 4 | — | — | 308,910 | Iceland | Atlantic/Reykjavik |
| 421 | Keflavík | Southern Peninsula (Iceland) | — | Iceland | Atlantic/Reykjavik |
| 462 | Akureyri | Northeastern Region (Iceland) | 17,693 | Iceland | Atlantic/Reykjavik |
| 5 | Reykjavík | Capital Region (Iceland) | 118,918 | Iceland | Atlantic/Reykjavik |
| 551 | Reykjavík | Capital Region (Iceland) | 118,918 | Iceland | Atlantic/Reykjavik |
| 552 | Reykjavík | Capital Region (Iceland) | 118,918 | Iceland | Atlantic/Reykjavik |
| 561 | Reykjavík | Capital Region (Iceland) | 118,918 | Iceland | Atlantic/Reykjavik |
| 562 | Reykjavík | Capital Region (Iceland) | 118,918 | Iceland | Atlantic/Reykjavik |
| 6 | — | — | 308,910 | Iceland | Atlantic/Reykjavik |
| 7 | — | — | 308,910 | Iceland | Atlantic/Reykjavik |
| 8 | — | — | 308,910 | Iceland | Atlantic/Reykjavik |