| Telefonnummer | telephone number |
| Telefonhörer | handset telephone receiver |
| Zeilennummer | line number |
| Telefonkarte | phonecard |
| Telefonsex | phone sex |
| Telefonbuch | phone book telephone directory telephone book directory white pages |
| Telefonie | telephony |
| Telefonmast | utility pole |
| Telefonterror | telephone harassment telephone terror |
| Telefonzelle | telephone booth telephone box |
| telefonieren | telephone |
| Seriennummer | serial number |
| Luftnummer | flop washout |
| Telefonist | telephone operator |
| Telefonistin | telephone operator |
| Telefon | telephone phone |
| Telefonat | telephone call telephone conversation |
| telefonisch | telephonic |
| Atomnummer | atomic number |
| Flugnummer | flight number |