Companies Using Google Call Conversion Tracking

Most pixels in this category tell you a company advertises. This one tells you how it sells: by phone. Our October 2026 crawl finds Google's website call-tracking script on 139,086 live domains, 100,284 of them matched to a company, 6th of 82 in Attribution & Conversion Tracking with 2.32%. The script swaps a site's phone number for a Google forwarding number when the visitor came from an ad, so what follows is a list of Google Ads advertisers who care about calls.

What the count measures

A domain counts when a page loads Google's call-tracking script from gstatic.com/call-tracking, or the functions it defines. It isn't a separate product. On all 76 company sites in our sample where the script loaded, a Google Ads AW- account loaded too, and 69 of them installed the pair through Google Tag Manager. That's why only 49,921 of these domains also appear on the Google Ads Conversion Tracking page, whose rule reads the inline gtag form.

The monthly line runs from 115,429 domains in June to 139,086 in October. I wouldn't sell anything off that slope. The domains we crawl turn over every month, dead sites out and new ones in, and our detection widens over time, so most of the June to July step is ours.

"Call tracking is the Google Ads setting that tells you a business sells by phone. 139,086 sites have switched it on, and construction firms lead them." - Sophie Clarke, Product Marketing Manager at TechnologyChecker.io

Sales signal: this is a pre-qualified list for anything that touches inbound calls: answering services, call analytics, scheduling. Every site on it runs Google Ads with calls as a goal.

No shared accounts to strip out

Before trusting a count like this I look for one account spread over many domains. I didn't find one. In raw HTML from 1,000 random domains, 334 showed an AW- ID, and no ID appeared more than twice. The clusters are small: pizza shops on Slice's ordering sites carry one page title on 169 domains, and dealer-website platforms sit under a few hundred car dealers each, Dealer Spike under 445 and Dealer Inspire under 371. None comes near 5% of the count.

Sales signal: treat it as one advertiser per domain. Dealer groups are the exception worth deduping before outreach.

Phone-led, small and established

Construction leads at 9.01%, twice its share on the conversion-tag page, followed by medical practices (5.7%), retail (4.52%), real estate (4.37%) and hospitals (3.17%). 87.25% of matched companies have 50 or fewer staff, and only 12.33% were founded in the 2020s, against 18.02% for Google's conversion tag. The 637 companies with more than 1,000 staff include NCR Voyix, Clarios and Cooper Standard on their main sites, UAB Medicine and the University of Rhode Island, and Little Caesars on its fundraising-programme site.

Sales signal: lead with contractors, clinics and agents. They already measure calls, so pitch what happens after the phone rings, not whether to track it.

A map drawn by Google's forwarding numbers

Website call tracking needs Google forwarding numbers, and Google offers them in 30 countries. Every country in our top 15 is on that list. The United States leads with 49,353 matched companies, and Australia (11,943) edges out the United Kingdom (11,172). Australia's count here is about two thirds of its count on the conversion-tag page (18,741); for the US the ratio is about a third, and for Brazil about a twentieth (1,848 against 37,272). The Netherlands and Turkey, both in the conversion tag's top 15, aren't forwarding-number countries and drop out.

Sales signal: of the countries in both top-15 tables, Australia has the biggest ratio, which makes it the obvious second market for anyone selling call analytics.

Switching and exits

The migration section is empty: no switching flow cleared our tests, and advertisers stack platforms: 59,477 of these domains run the Facebook Pixel today, 11,227 the LinkedIn Insight Tag and 4,061 TikTok Pixel. Exits we can count: 28,647 domains dropped the script on at least one hostname since we began tracking it on 16 March 2026. About one in five of them (5,452 of 28,652 in a recount) still run it on another hostname.

"A site that drops Google's call tracking may not have stopped measuring calls. Google accepts imported calls from other systems, so the tracking can move to a paid platform and still report into Google Ads." - Sophie Clarke, Product Marketing Manager at TechnologyChecker.io

Sales signal: for CallRail, Invoca and their peers, this list is the upgrade pool: businesses already convinced that calls are worth measuring, using the free tool that only sees Google traffic.

The stack around it

Google Tag Manager (99.51%) and Google Analytics (98.26%) look universal because our rules for both match the gtag.js library the call script loads through. DoubleClick Floodlight's 61.2% likely includes the Ads tag's own calls. The independent rows say more. Microsoft Advertising runs on 12.05%, nearly double its 6.28% on the conversion-tag page, so phone-led advertisers are likelier to buy Bing ads as well. WordPress is on 57.83% and Elementor on 21.48%; the most common consent tool, CookieYes, is on 5.69%.

Sales signal: a WordPress site with Google call tracking and no Bing tag is a two-line pitch for a local PPC agency.

Where it sits against the call-tracking platforms

The category table compares it with whole-platform pixels, which isn't the real contest. The rivals are dedicated call-tracking products in our Call Tracking category: CallRail on 74,460 domains and Invoca on 23,770, per their profiles. Google's option is free, per its setup guide, and limited to calls from people who clicked a Google ad. Google's own Help page lists imported call conversions from another system as one of five methods, which is the bridge the paid platforms use.

Sales signal: the pitch against Google's tool is coverage, every channel instead of one, not price.

Key takeaways

1. 139,086 live domains, 6th of 82 in Attribution & Conversion Tracking with 2.32%.

2. Always part of Google Ads: 76 of 76 sampled sites loaded an AW- account with it, 69 through Google Tag Manager.

3. Construction leads at 9.01%, and 87.25% of matched companies have 50 or fewer staff.

4. Every top-15 country is a forwarding-number country; Australia (11,943) ranks second.

5. No shared account or platform comes near 5% of the count.

How to use this list

Start with the industry filter: construction, medical practices and real estate are the core. For the full list of 139,086 domains with company, size and stack data, explore TechnologyChecker.io. Our guide to technology detection methods explains why a script loaded by a tag manager can show up on one of our pages and not another.