00354 and +354 are used interchangeably to dial Iceland phone numbers from a mobile (more on the plus sign).
| Phone type | Dialing format | Or using + |
|---|---|---|
| Cell phone | 00 354 3xx xxx xxx | +354 3xx xxx xxx |
| Cell phone | 00 354 6xx xxxx | +354 6xx xxxx |
| Cell phone | 00 354 7xx xxxx | +354 7xx xxxx |
| Cell phone | 00 354 8xx xxxx | +354 8xx xxxx |
| Landline - Reykjavik | 00 354 5xx xxxx | +354 5xx xxxx |
| Landline | 00 354 4xx xxxx | +354 4xx xxxx |