# Reverse AdSense Lookup & Publisher IDs | Vaneform

Find Google publisher IDs in public ads.txt and page markup, then reverse lookup connected sites in the observed collection. Export per-domain checks for free.

## Inspect publisher accounts before following connections

Enter up to ten domains separated by commas or spaces. The tool checks public ads.txt and homepage markers for Google publisher IDs. Each domain has its own outcome, observed-account count, source links and date. Unfinished domains can be retried separately.

DIRECT records identify a direct seller-account relationship, RESELLER records identify an authorized resale relationship, and INLINE records describe a publisher ID observed on a page. Follow a pub- ID to see associated sites recorded in the collection, and retain those relationship labels when comparing sites.

## Example: two observations of one account

On 2026-10-08, a V2EX verification found pub-5060390702525238 in both a DIRECT ads.txt record and an INLINE page observation. The domain check counted one observed account, while the evidence table preserved both relationships and their source URLs.

[Read the public V2EX ads.txt source](https://www.v2ex.com/ads.txt)

## Questions

### What does a reverse lookup cover?

It searches current publisher observations already collected by Vaneform. Coverage grows through real domain checks. Empty or partial outcomes retain their scope; newly observed connections can be watched through a signed-in daily or weekly monitor.

## Original sources

- [IAB Tech Lab: ads.txt specification](https://iabtechlab.com/ads-txt/)

Explanation reviewed: 2026-10-08

## Related tools and guides

- [Research public Google ads](https://vaneform.com/tools/google-ads)
- [Inspect page outbound links](https://vaneform.com/tools/outbound-links)
- [Publisher monitoring API](https://vaneform.com/docs/api)

Canonical: https://vaneform.com/tools/adsense