| Symbol | Name | Country | Exchange |
|---|---|---|---|
| TEF | Telefonica SA | US | NYSE |
| ICN | Information and Communication Networks Public Company Limited | TH | BK |
| TEF | Telefonica | ES | MC |
| STCO | Stratocomm Corp | US | OTC |
| TNE2 | Telefónica S.A | DE | F |
| TNE5 | Telefónica S.A | DE | F |
| TNE5 | Telefónica S.A | DE | XETRA |
| 0TDE | Telefonica | GB | LSE |
| TEFN | Telefónica S.A | MX | MX |