Każdy wysłany SMS musi "przejść" przez centrum SMS. W swoim telefonie wpisujemy numer tego centrum. Jest to taki serwer, rozsyłający SMS'y do adresatów. Każda sieć telefonii komórkowej oferująca tą usługę ma swoje centrum SMS. Z jego pomocą użytkownicy rozliczani są z opłat za przesyłane wiadomości tekstowe. Czasem jednak niektórzy operatorzy urządzają promocje umożliwiające wysyłanie SMS'ów za darmo. Możemy również spróbować "wziąć w nich udział"
Poniższa tabela zawiera numery centrum SMS w różnych sieciach na świecie. Wcale nie twierdzę, że jest ona zawsze aktualna, lecz zawsze można zajrzeć na inną stronę, której autorzy zapewne o to dbają.
| Nazwa | Kraj | Numer |
|---|---|---|
| Comviq | Sweden | +46-707990001 |
| Comviq | Sweden | +46-707990002 |
| Comviq | Sweden | +46-707990003 |
| Comviq | Sweden | +46-707773078 |
| Telia | Sweden | +46-705008999 |
| Europolitan | Sweden | +46-708000708 |
| NetCom | Norway | +47-92001000 |
| NetCom | Norway | +47-9208977 |
| TeleNor | Norway | +47-90002100 |
| TeleNor | Norway | +47-90007777 |
| Sonera | Finland | +358-508771010 |
| Radiolinja | Finland | +358-405202000 |
| Sonofon | Denmark | +45-40590000 |
| TeleDanmark | Denmark | +45-40390999 |
| Postur og Simi | Iceland | +354-8900100 |
| EMT | Estonia | +372-5099000 |
| Ritabell | Estonia | +372-5509911 |
| Radiolinja | Estonia | +372-568771010 |
| LMT | Latvia | +371-9202020 |
| Omnitel | Lithuania | +370-9899992 |
| Vodafone | UK | +44-385016005 |
| CellNet | UK | +44-802000332 |
| Orange | UK | +44-973100973 |
| Orange | UK | +44-973100974 |
| One2One | UK | +44-7958879879 |
| Eircell | Eire | +353-87699989 |
| Eircell | Eire | +353-87699985 |
| Esat | Eire | +353-868002000 |
| D1 | Germany | +49-1710760000 |
| Talkline | Germany | +49-1710760900 |
| D2 | Germany | +49-172227033 |
| D2 | Germany | +49-1722270000 |
| D2 | Germany | +49-1722270333 |
| Talkline | Germany | +49-1722270258 |
| Debitel | Germany | +49-1722270222 |
| IC3S | Germany | +49-1722270201 |
| Dr Materna | Germany | +49-1722270111 |
| E2 | Germany | +49-1760000443 |
| E-Plus | Germany | +49-1770600000 |
| E-Plus | Germany | +49-1770610000 |
| E-Plus | Germany | +49-1770620000 |
| Libertel | Netherlands | +31-6540881000 |
| PTT | Netherlands | +31-653131313 |
| Mobistar | Belgium | +32-95955205 |
| Proximus | Belgium | +32-75161616 |
| Proximus | Belgium | +32-75161612 |
| PTT | Luxembourg | +352-021100003 |
| North West | Russia | +7-8129600096 |
| Era GSM | Poland | +48-602951111 |
| Era GSM | Poland | +48-602951112 |
| PlusGSM | Poland | +48-601000310 |
| PlusGSM | Poland | +48-601000311 |
| IDEA Centertel | Poland | +48-501200777 |
| Eurotel | Czech rep | +420-602909909 |
| Radiomobil | Czech rep | +420-603051 |
| Eurotel | Slovakia | +421-903333000 |
| Pannon | Hungary | +36-20300099 |
| Pannon | Hungary | +36-30610000 |
| Westel900 | Hungary | +36-30888000 |
| Westel900 | Hungary | +36-30303100 |
| OmniTel | Italy | +39-3492000200 |
| OmniTel | Italy | +39-3492000300 |
| OmniTel | Italy | +39-3492000400 |
| OmniTel | Italy | +39-3492000500 |
| OmmniTel | Italy | +39348000100 |
| TIM | Italy | +39-3359609600 |
| TIM | Italy | +39-3359608000 |
| TIM | Italy | +39-338960960 |
| TIM | Italy | +39-338980000 |
| A1 | Austria | +43-6640501 |
| max.mobil | Austria | +43-676021 |
| Natel-D | Switzerland | +41-79191 |
| Natel-D | Switzerland | +41-89191 |
| Natel-D | Switzerland | +41-794999000 |
| SFR | France | +33-609001390 |
| Bouygues | France | +33-660003000 |
| Itineris | France | +33-689004431 |
| STA | Andorra | +376-301004 |
| Telefonica | Spain | +34-09090909 |
| Airtel | Spain | +34-07133000 |
| Airtel | Spain | +34-07003110 |
| Telcel | Portugal | +351-931770077 |
| TMN | Portugal | +351-936210000 |
| Panafon | Greece (UK) | +44-385016005 |
| OTE Hellas | Greece | +30-3850116005 |
| Telestet | Greece | +30-93599000 |
| Cosmote | Greece | +30-097100000 |
| Turkcell | Turkey | +90-5329010000 |
| Telsim | Turkey | +90-5429800033 |
| Lebancell | Lebanon | +961-3488888 |
| Vodafone | Australia | +61-415011501 |
| Telstra | Australia | +61-418706700 |
| Telstra | Australia | +61-418706800 |
| Telstra | Australia | +61-418706900 |
| Optus | Australia | +61-412025989 |
| Optus | Australia | +61-411990000 |
| Optus | Australia | +61-411990001 |
| Optus | Australia | +61-411990003 |
| BellSouth | New Zealand | +64-21600600 |
| MTN | South Africa | +27-831000002 |
| Vodacom | South Africa | +27-829119 |
| Vodacom | South Africa | +27-829129 |
| Telecom | China | +86-1390591500 |
| Hutchinson | Hong Kong | +852-94985795 |
| HK Telecom | Hong Kong | +852-90288000 |
| Mobile One | Singapore | +65-96845999 |
| SingTel | Singapore | +65-96400001 |
| SingTel | Singapore | +65-96500001 |
| SingTel | Singapore | +65-98189999 |
| SingTel | Singapore | +65-96197777 |
| AIS | Thailand | +66-18110888 |
| ADAM | Malaysia | +60-173600010 |
| Celcom | Malaysia | +60-193900000 |
| Mutiara | Malaysia | +60-162999000 |
| Maxis | Malaysia | +60-120000015 |
| Satelindo | Indonesia | +62-81615 |
| Telkomsel | Indonesia | +62-811130004 |
| GSM-XL | Indonesia | +62-818445009 |
| Globe | Philippines | +63-91702 |
| Fido | Canada | +1-5149931123 |
| Aerial | Comms USA | +1-8132630025 |
| Aerial | Comms USA | +1-2812350025 |
| Voicestream | USA | +1-2063130004 |
| Pacific Bell | USA | +1-2099042010 |
| Pacific Bell | USA | +1-2099042020 |
| Powertel | USA | +1-3343338200 |
| Omnipoint | USA | +1-9179070004 |
| Sprint | USA | +1-7044100000 |
| Washington PCS | USA | +1-410258953 |