The Trade Desk Mobile Proxies for Programmatic Placement Checks

The Trade Desk is a demand-side platform through which agencies and brands buy programmatic display, video and audio across publishers, apps and connected TV. A campaign's targeting decides who is eligible: country, metro, device, time of day. A trader in London or Singapore managing a US campaign has a dashboard full of impression counts and no way to see a placement served. A Stateside Proxies line in the campaign's metro gives the browser a US mobile address inside the targeting, so placements can be found, screenshotted and reported. This page explains the method for traders and account managers, not engineers.

What programmatic targeting reads from the connection

Geography, usually from the address: country, state, metro. Device type and operating system from the browser, with mobile web and app inventory bought separately. Connection type, with carrier traffic counted as mobile. Daypart from the local time. A campaign bought for Phoenix mobile web in the evening serves only to a browser that looks like a Phoenix phone in the evening. Datacenter addresses are routinely excluded by pre-bid filters.

Metro in US programmatic buying usually means a designated market area, a Nielsen television region that can reach far beyond a city; the Phoenix area, for instance, takes in much of Arizona. That works in your favour, because the line only needs to fall inside the region. Before a session, open an IP lookup page and compare the location it reports with the geography set on the ad group, the level at which The Trade Desk holds targeting, since mobile addresses are sometimes placed at a carrier's regional hub and lookup databases can disagree.

Who verifies Trade Desk campaigns

Traders confirming that a line item actually serves in its metro and daypart with the right creative. Account managers producing proof for clients. Brand-safety teams checking publishers and adjacency. Creative teams confirming that video placements play correctly on a mobile connection. Each is a human finding a live placement from inside the targeting.

Traders often need to confirm frequency caps as well as presence: browse the same publishers over an hour and count how many times the creative appears to the one user the line represents. Because the address holds, the count is the platform's real behaviour for a real person rather than an artefact of a changing exit.

Record the domain, ad format, creative name, local time and whether the sighting falls inside the flight dates. Set these beside any post-bid figures from verification vendors such as Integral Ad Science or DoubleVerify, which measure at scale what one person can only sample. Your own sightings are paid impressions, small in number; note them so they can be left out of client reporting.

Why a carrier line

Pre-bid filters exclude datacenter traffic, so a VPN sees nothing. A carrier line in the metro is mobile inventory within the geography; with the browser's clock set to the metro, it falls inside the daypart too. The address holds steady, so a session across several publishers looks like one user and frequency caps behave as they would for a real person.

Setting up the check

Rent a line in the campaign's metro on the carrier it targets if any. Build a browser profile with the metro's time zone and US English. Browse the publishers in the campaign's inventory list during the campaign's daypart, scrolling and allowing video to load. Screenshot each placement with URL and local time, click through once and record the landing page. For in-app and mobile video, use a test phone through the line's VLESS link.

Use the platform's site-level reporting to select domains that delivered in the past day or two, because an auction can be lost on any given page and a quiet hour proves nothing. In-app impressions normally hang on a phone's advertising ID, so a desktop browser cannot stand in for them, and the VLESS link that puts a test phone on the line exists only on server-based lines. Confirm the line type before renting one for app checks.

Staying inside the rules

Platform and publisher terms forbid click inflation and automated traffic. Verification is a human finding placements and recording them, with one click-through per placement.

Setting up a The Trade Desk proxy on Stateside Proxies

1. Rent a line in the campaign's metro and carrier.
2. Create a browser profile with the line's details, the metro's time zone and en-US; confirm the carrier on an IP lookup page.
3. During the campaign's daypart, browse the publishers in the inventory list and allow video to load.
4. Screenshot placements with URL and local time; click through once and record the landing page.
5. Move the line to the next metro, free, and repeat.

The Trade Desk proxy questions