| Port Code | Port Name | Country |
| BESFY | Sint-Amandsberg | Belgium |
| BESGI | Saint-Gilles (Sint-Gillis)/Brussel (Bruxelles) | Belgium |
| BESGI | Sint-Gillis (Saint-Gilles)/Brussel (Bruxelles) | Belgium |
| BESGM | Stasegem | Belgium |
| BESGR | Sint-Genesius-Rode (Rhode-Saint-Genèse) | Belgium |
| BESGS | St Georges | Belgium |
| BESGW | St Gillis-Waas | Belgium |
| BESGX | Sclaigneaux | Belgium |
| BESHB | Schellebelle | Belgium |
| BESHE | Schendelbeke | Belgium |
| BESHL | Schelle | Belgium |
| BESHO | Schalkhoven | Belgium |
| BESHU | St Hubert | Belgium |
| BESII | St Lievens-Esse | Belgium |
| BESIP | Sippenaeken | Belgium |
| BESIV | Saive | Belgium |
| BESIY | Silly | Belgium |
| BESJE | St Jan-in-Eremo | Belgium |
| BESJG | Sint-Job-in-'t-Goor | Belgium |
| BESJN | Saint-Josse-ten-Noode (Sint-Joost-ten-Node) | Belgium |
| BESJN | Sint-Joost-ten-Node (Saint-Josse-ten-Noode) | Belgium |
| BESJO | St Jozef Olen | Belgium |
| BESJR | St Joris | Belgium |
| BESJW | St Joris-Weert | Belgium |
| BESKI | Schriek | Belgium |
| BESKK | Steenokkerzeel | Belgium |
| BESKL | St Katherina-Lombeek | Belgium |
| BESKR | Stokrooie | Belgium |
| BESKU | St Kruis | Belgium |
| BESKW | St Kruis-Winkel | Belgium |
| BESLA | Sélange | Belgium |
| BESLE | Sleidinge | Belgium |
| BESLG | St Léger | Belgium |
| BESLH | St Lievens-Houtem | Belgium |
| BESLI | Bois-de-Lessines | Belgium |
| BESLK | Spalbeek | Belgium |
| BESLN | St Lenaarts | Belgium |
| BESLO | Sorinne-la-Longue | Belgium |
| BESLS | Salles | Belgium |
| BESLT | Stavelot | Belgium |
| BESLU | St Laureins | Belgium |
| BESLW | Sint-Lambrechts-Woluwe (Woluwé-Saint-Lambert)/Brus | Belgium |
| BESLW | Woluwé-Saint-Lambert (Sint-Lambrechts-Woluwe)/Brus | Belgium |
| BESLY | Sclayn | Belgium |
| BESMA | St Mard | Belgium |
| BESMC | Saint-Marc | Belgium |
| BESME | St Michiels | Belgium |
| BESMI | St Martens-Lierde | Belgium |
| BESML | St Martens-Latem | Belgium |
| BESMM | Smeermaas | Belgium |
| BESMO | Sprimont | Belgium |
| BESMR | St Margriete | Belgium |
| BESNA | Sinaai | Belgium |
| BESNE | Schoonaarde | Belgium |
| BESNK | St Niklaas | Belgium |
| BESNO | St Nicolas | Belgium |
| BESOB | Schoenberg | Belgium |
| BESOD | Ste-Ode | Belgium |
| BESOG | Seloignes | Belgium |
| BESOI | Soignies | Belgium |
| BESOM | Sommière | Belgium |
| BESON | Soiron | Belgium |
| BESOR | Schore | Belgium |
| BESOU | Soumagne | Belgium |
| BESOV | Strombeek-Bever | Belgium |
| BESPA | Spa | Belgium |
| BESPE | Scheepsdale | Belgium |
| BESPH | Sterpenich | Belgium |
| BESPI | Spiere (Espierres) | Belgium |
| BESPI | Espierres (Spiere) | Belgium |
| BESPK | Sint-Pieters-Kapelle | Belgium |
| BESPL | St Pieers-Leeuw | Belgium |
| BESPO | Sint-Pieters-Woluwe (Woluwé-Saint-Pierre)/Brussel | Belgium |
| BESPO | Woluwé-Saint-Pierre (Sint-Pieters-Woluwe)/Brussel | Belgium |
| BESPS | Spiennes | Belgium |
| BESPT | St Pieters-Leeuw | Belgium |
| BESPU | Scherpenheuvel-Zichem | Belgium |
| BESPV | Sint-Pieters-Voeren | Belgium |
| BESRA | Sirault | Belgium |
| BESRB | Sterrebeek | Belgium |
| BESRE | Souvret | Belgium |
| BESRI | Schorisse | Belgium |
| BESRN | Sorinnes | Belgium |
| BESRY | St Remy | Belgium |
| BESSA | St Sauveur | Belgium |
| BESSI | St Servais | Belgium |
| BESSK | Snaaskerke | Belgium |
| BESSL | St Katelijne-Waver | Belgium |
| BESSN | Sclessin | Belgium |
| BESSU | Sensenruth | Belgium |
| BESSY | St Symphorien | Belgium |
| BESTA | Stabroek | Belgium |
| BESTB | Strépy-Bracquegnies | Belgium |
| BESTD | Staden | Belgium |
| BESTE | Strée | Belgium |
| BESTI | Schaltin | Belgium |
| BESTK | Stekene | Belgium |
| BESTM | Stembert | Belgium |
| BESTN | Sautin | Belgium |
| BESTR | St Truiden | Belgium |