Postcode areas 26 - Oldenburg, Wilhelmshaven, Emden, Aurich
- Postcode area 26121 Oldenburg (Oldenburg)
- Postcode area 26122 Oldenburg
- Postcode area 26123 Oldenburg (Oldenburg)
- Postcode area 26125 Oldenburg (Oldenburg)
- Postcode area 26127 Oldenburg (Oldenburg)
- Postcode area 26129 Oldenburg (Oldenburg)
- Postcode area 26131 Oldenburg (Oldenburg)
- Postcode area 26133 Oldenburg (Oldenburg)
- Postcode area 26135 Oldenburg (Oldenburg)
- Postcode area 26160 Bad Zwischenahn
- Postcode area 26169 Friesoythe
- Postcode area 26180 Rastede
- Postcode area 26188 Edewecht
- Postcode area 26197 Großenkneten
- Postcode area 26203 Wardenburg
- Postcode area 26209 Hatten
- Postcode area 26215 Wiefelstede
- Postcode area 26219 Bösel
- Postcode area 26316 Varel
- Postcode area 26340 Zetel
- Postcode area 26345 Bockhorn
- Postcode area 26349 Jade
- Postcode area 26382 Wilhelmshaven
- Postcode area 26384 Wilhelmshaven
- Postcode area 26386 Wilhelmshaven
- Postcode area 26388 Wilhelmshaven
- Postcode area 26389 Wilhelmshaven
- Postcode area 26409 Wittmund
- Postcode area 26419 Schortens
- Postcode area 26427 Esens, Neuharlingersiel u.a.
- Postcode area 26434 Wangerland
- Postcode area 26441 Jever
- Postcode area 26446 Friedeburg
- Postcode area 26452 Sande
- Postcode area 26465 Langeoog
- Postcode area 26474 Spiekeroog
- Postcode area 26486 Wangerooge
- Postcode area 26487 Blomberg, Neuschoo
- Postcode area 26489 Ochtersum
- Postcode area 26506 Norden
- Postcode area 26524 Hage, Halbemond u.a.
- Postcode area 26529 Upgant-Schott, Osteel u.a.
- Postcode area 26532 Großheide
- Postcode area 26548 Norderney
- Postcode area 26553 Dornum
- Postcode area 26556 Westerholt, Schweindorf u.a.
- Postcode area 26571 Juist, Memmert
- Postcode area 26579 Baltrum
- Postcode area 26603 Aurich
- Postcode area 26605 Aurich
- Postcode area 26607 Aurich
- Postcode area 26624 Südbrookmerland
- Postcode area 26629 Großefehn
- Postcode area 26632 Ihlow
- Postcode area 26639 Wiesmoor
- Postcode area 26655 Westerstede
- Postcode area 26670 Uplengen
- Postcode area 26676 Barßel
- Postcode area 26683 Saterland
- Postcode area 26689 Apen
- Postcode area 26721 Emden
- Postcode area 26723 Emden
- Postcode area 26725 Emden
- Postcode area 26736 Krummhörn
- Postcode area 26757 Borkum
- Postcode area 26759 Hinte
- Postcode area 26789 Leer
- Postcode area 26802 Moormerland
- Postcode area 26810 Westoverledingen
- Postcode area 26817 Rhauderfehn
- Postcode area 26826 Weener
- Postcode area 26831 Bunde
- Postcode area 26835 Hesel, Neukamperfehn u.a.
- Postcode area 26842 Ostrhauderfehn
- Postcode area 26844 Jemgum
- Postcode area 26845 Nortmoor
- Postcode area 26847 Detern
- Postcode area 26849 Filsum
- Postcode area 26871 Papenburg
- Postcode area 26892 Dörpen, Lehe, u.a.
- Postcode area 26897 Esterwegen u.a.
- Postcode area 26899 Rhede (Ems)
- Postcode area 26901 Lorup, Rastdorf
- Postcode area 26903 Surwold
- Postcode area 26904 Börger
- Postcode area 26906 Dersum
- Postcode area 26907 Walchum
- Postcode area 26909 Neubörger, Neulehe
- Postcode area 26919 Brake
- Postcode area 26931 Elsfleth
- Postcode area 26935 Stadland
- Postcode area 26936 Stadland
- Postcode area 26937 Stadland
- Postcode area 26939 Ovelgönne
- Postcode area 26954 Nordenham
- Postcode area 26969 Butjadingen