Assign unique phone numbers to every marketing channel, campaign, and landing page. Attribute every inbound call to the source that generated it — with zero guesswork.
CallScaler offers local tracking numbers at $0.50/month on the Pro plan, with pay-as-you-go starting at $0 with no monthly commitment. All plans include call recording, AI summaries, and DNI at no extra per-feature cost. For agencies and pay-per-call networks managing 500+ numbers, Agency and Network plans offer volume pricing.
From setup to attribution in four steps.
Choose local or toll-free numbers from our inventory of millions. Available instantly via dashboard or API.
Map each number to a campaign, ad group, landing page, or offline channel. One number per source for clean attribution.
When someone dials a tracking number, CallScaler routes the call to your destination and logs the source automatically.
Every call appears in your dashboard tagged with the source, campaign, and caller details. Export or push to your ad platform.
Every number comes fully loaded.
Choose from millions of numbers across every US area code, plus toll-free options.
One number per campaign gives you crystal-clear ROI data for every marketing channel.
Create pools of numbers for high-traffic campaigns. CallScaler auto-assigns from the pool per visitor.
Port existing numbers into CallScaler. Keep the numbers your customers already know.
Numbers are active in seconds. No waiting, no approvals, no setup fees.
See call volume, answer rate, duration, and lead quality for every tracking number.
No credit card required. Set up in under 60 seconds.
Any business or agency that runs marketing campaigns and receives phone calls.
Call tracking numbers are dedicated phone numbers assigned to specific marketing campaigns, ad groups, or traffic sources. When a potential customer calls one of these numbers, your call tracking platform logs the source so you know exactly which campaign generated the call. This is the foundation of call attribution and the first thing you set up in any call tracking platform.

You grab a local or toll-free number and assign it to a source. For example, you might assign (555) 123-4567 to your Google Ads campaign for 'roof repair' and (555) 123-4568 to your Facebook lead gen ads. When someone calls either number, CallScaler routes the call to your real business line and records which source drove the call. The caller never knows they dialed a tracking number. For online campaigns, you can take this further with dynamic number insertion, which swaps numbers on your website automatically based on how each visitor found you.
Static tracking numbers are assigned one-per-source and stay fixed. They work for offline campaigns like billboards, print ads, radio spots, and direct mail where each channel gets its own number. Dynamic tracking numbers are part of a number pool that rotates on your website to give each visitor session a unique number, enabling visitor-level attribution. Most businesses use a mix of both. Static for offline, dynamic for online.
For offline campaigns, you need one number per source you want to track separately. For website visitor tracking via DNI, the pool size depends on your concurrent traffic. A site with under 500 daily visitors typically works well with 10-15 numbers in the pool. CallScaler recycles numbers after visitor sessions expire, so you need fewer than you might expect. You can start small and add more as your traffic grows.
Every call to a tracking number is logged with the source, caller ID, location, duration, recording, AI transcription, AI summary, and lead score. You can search, filter, and export this data from the call log, push it to Google Ads or Meta for conversion optimization, or send it to any tool via webhooks. The data lives in your CallScaler dashboard alongside form submissions and SMS messages for a complete view of lead activity.
Get the most out of your tracking numbers from day one:
Different industries use tracking numbers in different ways:
Tracking numbers forward to your real business line. Callers never know they dialed a tracking number, and your team answers calls the same way they always do. The only difference is that CallScaler logs the source, records the call, and runs AI analysis before connecting. You keep your existing phone system, receptionist, or call center. CallScaler sits in front of it as an attribution layer, not a replacement.
Tracking numbers are the starting point for everything else in CallScaler. Attach a call flow to route calls through IVR menus, round-robin distribution, or geo-routing. Enable DNI to swap numbers on your website automatically. Push call conversion data to Google Ads or Meta. Every feature connects back to the tracking number as the foundation of your call attribution setup.

Common questions about Tracking Numbers.
Works great with Tracking Numbers.
One line of JavaScript. Every website visitor sees a unique tracking number based on how they found you — Google Ads, Facebook, organic, or direct. Visitor-level attribution without changing your site.
Learn moreBuild sophisticated call routing with zero code. Greetings, IVR menus, round-robin distribution, schedule-based routing, geo-routing, and webhooks — all in a visual editor that anyone can use.
Learn moreGroups of tracking numbers that work together for visitor-level attribution. Numbers are automatically assigned to website visitors and recycled when sessions expire. Configure pool size, session duration, and overflow behavior.
Learn moreSign up free and get started in under 60 seconds. No credit card required.