I work in the address verification field, actually (a company called SmartyStreets) -- where we do postal address verification (in the United States).

You'll need a CASS-Certified vendor of address data. These companies' software has been approved by the USPS to append missing information onto an address and return accurate results. One such service is LiveAddress -- or if you have a list of addresses, there's the Smartylist -- which will give you the information you need. Both are free to an extent, but pretty affordable after that.

In ArcGIS, I believe the LiveAddress API can be implemented programmatically. Alternatively, a list of addresses can be exported to a spreadsheet or CSV and uploaded into the list scrubbing service.

I work in the address verification field, actually (a company called SmartyStreets) -- where we do postal address verification (in the United States).

You'll need a CASS-Certified vendor of address data. These companies' software has been approved by the USPS to append missing information onto an address and return accurate results. One such service is US Street Address API -- or if you have a list of addresses, there's the Bulk Address Validation Tool -- which will give you the information you need. Both are free to an extent, but pretty affordable after that.

In ArcGIS, I believe the LiveAddress API can be implemented programmatically. Alternatively, a list of addresses can be exported to a spreadsheet or CSV and uploaded into the list scrubbing service.

I work in the address verification field, actually (a company called SmartyStreets) -- where we do postal address verification (in the United States).

You'll need a CASS-Certified vendor of address data. These companies' software has been approved by the USPS to append missing information onto an address and return accurate results. One such service is LiveAddress -- or if you have a list of addresses, there's the Certified Scrubbing -- which will give you the information you need. Both are free to an extent, but pretty affordable after that.

In ArcGIS, I believe the LiveAddress API can be implemented programmatically. Alternatively, a list of addresses can be exported to a spreadsheet or CSV and uploaded into the list scrubbing service.

I work in the address verification field, actually (a company called SmartyStreets) -- where we do postal address verification (in the United States).

You'll need a CASS-Certified vendor of address data. These companies' software has been approved by the USPS to append missing information onto an address and return accurate results. One such service is LiveAddress -- or if you have a list of addresses, there's the Smartylist -- which will give you the information you need. Both are free to an extent, but pretty affordable after that.

In ArcGIS, I believe the LiveAddress API can be implemented programmatically. Alternatively, a list of addresses can be exported to a spreadsheet or CSV and uploaded into the list scrubbing service.