CallTracker + Google Analytics 4 integration

What happens when a call comes in

• Reads the _ga and _ga_<ID> cookies set by your GA4 tag (the snippet does not set cookies of its own).
• Sends one event per completed call (default name phone_call) with the call duration, placement, traffic source and UTM values, and an optional value and currency.
• Retries failed requests automatically; GA4 accepts events up to 72 hours after the call.
• Can optionally also send calls without a GA client ID (for example calls to offline numbers) as unattributed events.

Data sent to Google Analytics 4

• GA client ID and session ID
• Call ID, duration and start time
• Placement name, traffic source, UTM source, medium, campaign, term and content
• Optional value and currency
• The visitor's ad_user_data and ad_personalization consent, when the page reports it
• The caller's phone number is never sent to GA4

How to set it up

1. In GA4, open Admin → Data streams → your web stream. Copy the Measurement ID (G-…) and create a Measurement Protocol API secret.
2. In CallTracker, open Settings → Conversion tracking, enter the Measurement ID and API secret, choose the event name and the data collection endpoint (global or EU), and save.
3. Click Test connection: CallTracker validates a sample event against GA4's validation endpoint.
4. In GA4, mark the event as a key event so calls count as conversions.

Limitations

• Attribution needs GA4 running on the same pages as the CallTracker snippet; visitors who block Analytics have no client ID.
• The snippet must be on the current snippet version (it reads the GA cookies when it assigns a number and on its first heartbeat).
• Events reach GA4 reports with GA4's usual processing delay.

Related integrations

• Google Ads
• Meta Conversions API
• Webhooks
• When do calls sync?