Verified Bots Directory

Directory / Search engines

Quantcastbot

Verifiable

Quantcast's advertising crawler. It crawls websites to extract page content for interest-based audience categorization and to run quality-assurance checks on advertisement landing pages.

Operated by Quantcast · Official documentation

User agents

Patterns this directory matches, with real observed strings.

  • regexQuantcastbot/\d
  • observedQuantcastbot/1.0 (+https://www.quantcast.com/bot)
  • observedQuantcastbot/2.0 (+https://www.quantcast.com/bot)

How to verify

Documented static ranges: 52.34.88.131/32, 54.71.154.151/32, 192.184.74.253/32, 192.184.75.253/32, 192.184.76.253/32, 192.184.77.253/32, 103.229.11.253/32

IP ranges (7)

Refreshed daily from the operator's feed. Also available as /data/ips/quantcast-crawler.ips and /data/bots/quantcast-crawler.json.

103.229.11.253/32
192.184.74.253/32
192.184.75.253/32
192.184.76.253/32
192.184.77.253/32
52.34.88.131/32
54.71.154.151/32

Good Bot Practices scorecard

  • Identifies honestly

    Stable UA token documented (1 pattern)

  • Verifiable

    Verifiable

  • Respects robots.txt

    Honors robots.txt

  • Behaves

    Crawl-rate behavior is operator-declared; not machine-verifiable from this dataset

  • Reachable operator

    Operator and documentation published

Measured against the Good Bot Practices.