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postnummer (11 elementer):
IP1 (4)
IP10 (8)
IP11 (3)
IP12 (27)
IP13 (42)
IP14 (46)
IP15 (2)
IP16 (7)
IP17 (23)
IP18 (3)
IP19 (26)
Gjennomsnittlig GPS-koordinater for postnummer ip1: 52.071, 1.144

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Notering byer:
>> Whitton IP1, Suffolk, England, GPS-koordinater: 52.0833,1.1333
>> Castle Hill IP1, Suffolk, England, GPS-koordinater: 52.0713,1.1444
>> Ipswich IP1, Suffolk, England, GPS-koordinater: 52.0592,1.1555
>> Akenham IP1, Suffolk, England, GPS-koordinater: 52.0713,1.1444