sub_country_targeting

Name	Modifier & Defaults	Type	Description
sub_country_targeting	Default: Targeting Object with `type` = ALL and `value` = [] (empty collection)	Targeting Object Use the Dictionary to fetch possible values. Usage: 1. Target 1 country only, using INCLUDE mode. 2. Target 1 or more regions (or DMAs) in the above country. Can be used for region targeting or DMA targeting (in the US) - but not both at the same time.	List of regions (or DMAs) that the campaign will target or exclude. You can use this field or one of the ‘specific’ fields (`region_country_targeting` or `dma_country_targeting`) See: Country and Sub-Country Targeting - and the field definitions that follow below.

The sub_country_targeting field is updated directly via the campaigns endpoint - and the targeted collection is stored directly in the value property:

{
   "id": "1234",
   //...
   "sub_country_targeting": {
      "type": "INCLUDE",
      "value": [
         "NY"
      ],
      "href": null
   }
   //...
}

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The href property is always null.

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You can apply region or DMA targeting - but not both

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For a given update request, you can submit values via sub_country_targeting or via one of the newer, 'specific' fields - but not via both.
See: Country and Sub-Country Targeting