How Call Tracking Works

How does a tracked call travel from advert to phone?

A tracked call passes through five stages. Each one adds evidence to the call record.

1. Visit: someone clicks your Google Ad, finds you in organic search or reads your leaflet.
2. Number shown: on your website, Call Bullet's script shows a tracking number from your pool and remembers the visit's source, landing page, UTM tags and Google click ID. Offline, a fixed number is printed.
3. Call forwarded: the caller dials that number and Call Bullet forwards the call to your main line in real time.
4. Call recorded: the call is logged with time, duration and whether it was answered, and can be recorded and transcribed.
5. Call attributed and reported: the call is matched to the visit or placement and appears in your call log, GA4 and Google Ads.

How does the website part work?

The website part uses a small script, or the Call Bullet WordPress plugin, which replaces your phone number with a tracking number for each visitor. It changes both the visible number and the tap-to-call link.

Each visitor keeps the same number for their session, so if they come back to the page they see the same number. When the pool is busy, numbers are reused carefully so calls still match the right visit. The mechanics are covered in dynamic number insertion explained.

The script does not override other scripts you run through Google Tag Manager. If it cannot run — for example, the visitor blocks scripts — your main number stays on the page, so no one is ever shown a broken number.

How are calls matched to the right source?

Matching depends on the type of number that rang.

What happens on the call itself?

The caller hears your phone ring as normal. Forwarding happens in the network, so there is no app to answer. You can play a short announcement to your team so they know which source the call came from, and callers can hear a recording notice if you record calls.

After the call, the recording and transcript appear in Call Bullet. Bryan, the AI analyst, summarises what the caller wanted and keeps facts separate from interpretation.

How do tracked calls reach Google Analytics and Google Ads?

Call Bullet sends each call to Google Analytics 4 as an event with its source and campaign, and can send qualified calls to Google Ads as offline conversions using the captured click ID. That means calls sit beside form leads when you judge campaigns.

Set-up steps are in the Google Analytics 4 integration guide. Google's own help on importing offline conversions explains how Google Ads uses them.

How long does setup take?

Setup takes minutes for the website and depends on verification for new numbers. UK numbers need identity documents before activation, as required by the regulator. Once active, the website script starts swapping straight away.

Businesses usually start small, as described in call tracking for small businesses; agencies roll it out per client, as described in call tracking for agencies.

What can affect accuracy?

Accuracy is highest when the pool is sized for your traffic and every placement has its own number.

• Too few website numbers for your traffic makes numbers shared between visitors, which lowers precision.
• Page caching can serve an old number; Call Bullet's plugin clears cache when settings change.
• People who call your main number from memory will show as unattributed.
• Offline adverts need their own fixed numbers, or their calls blend into direct traffic.

What does a real example look like?

Take a plumber in Leeds running Google Ads. A visitor clicks an advert for 'emergency plumber Leeds' and lands on the website, where Call Bullet replaces the published 0113 number with a 0113 number from the website pool, held for that visitor's session.

The visitor rings. The call forwards to the plumber's mobile within seconds, the caller hears normal ringing, and the call is logged with the source (Google Ads), the campaign, the keyword data available from the click and the landing page. If recording is switched on, the conversation is transcribed and stored against the same call.

That evening the plumber opens the dashboard and sees the call next to the advert spend that bought it. The call can also be sent to Google Ads as a conversion so bidding learns which keywords produce phone enquiries.

What can you do once calls are tracked?

Tracked calls become evidence you can act on, not just a count.

• Move budget from campaigns that never ring to the ones that do.
• Spot missed calls by hour and fix staffing gaps.
• Listen to recordings to check the quality of the leads each channel sends.
• Ask Bryan, Call Bullet's analyst, plain-English questions about which sources produced calls, with the evidence shown.
• Report organic calls separately — see call tracking for SEO.

Which parts are automatic and which need you?

Most of the work runs automatically after setup; a few choices stay with you.

Frequently asked questions