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Frequently Asked Questions (FAQ)Postal reference database
Q: How often is the AddressDoctor database updated?
Q: Can we extract the postal reference data from the databases?
Q: What is the size of the AddressDoctor reference database?
Q: How do I obtain new databases?
Q: Where does the addressdoctor reference data come from? A: Reference databases used by AddressDoctor can vary greatly in terms of data depth. Street and house number level data for numerous countries is available to AddressDoctor. This means that AddressDoctor verifies and - if necessary – corrects - street and house number data in an address. In ambiguous cases, for example an incorrect postal code or a locality name, the right address can be determined by means of the street information. Some countries do not provide detailed address information because of their delivery system or internal structure. In these cases, AddressDoctor can still check addresses by locality and, if applicable, by postal codes. Elements for those addresses, where no reference file is available, are provided with the output-file. In some countries, like in Kenya or the United Arab Emirates, mail is only delivered to post boxes. In these cases, there is no greater data depth necessary for standard delivery. Independent from the reference data, AddressDoctor can always check input files with respect to their address format. By parsing an address, individual parts are identified in order to place them in the right place in the output file. Our country list shows the reference data depth for every country supported by AddressDoctor. 
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Postal Code Lookup