Important: Call Tracking in LettrLabs works differently from most other integrations on this platform. You do not connect your own CallTrackingMetrics (CTM) account or enter a CTM API key anywhere in LettrLabs. Instead, LettrLabs provisions dedicated call-tracking phone numbers for you under LettrLabs' own CTM account, so you can attach a trackable number to your direct mail campaigns.
Unverified: the exact billing/authorization relationship with CallTrackingMetrics (e.g., whether LettrLabs' master account credentials or billing terms are visible to a customer anywhere) could not be fully confirmed from the frontend code alone. Verify this description against current product behavior before publishing.
1. Open Call Tracking
In the LettrLabs app, go to Call Tracking > Order Numbers.
2. Search for a tracking number
Use the Area Code field to search for available numbers in a specific area code.
Available numbers are listed with their rate center, and whether they support SMS and MMS, plus the monthly fee.
3. Add numbers to your cart
Click the + icon next to a number to add it to your cart. You can add multiple numbers if you plan to track multiple campaigns separately.
4. Check out
Click Checkout.
If you don't already have a payment method on file for call tracking, you'll be prompted to add a card. This card is billed directly by LettrLabs' call tracking provider for the ongoing monthly number fee and per-minute usage — it is billed separately from your LettrLabs subscription.
Confirm the purchase. Your new number(s) are provisioned and saved to your account.
5. Manage your numbers
Go to Call Tracking > My Numbers to see all numbers you've purchased. From here you can:
Set or edit the Forwards Calls To number — the real phone number (e.g., your business line) that calls to the tracking number will be forwarded to.
Delete a tracking number you no longer need.
View and manage the payment method on file for call tracking charges.
Unverified: the step that assigns a purchased tracking number to a specific mail campaign/order (so it prints on that campaign's mail piece) exists as a data field on the order record, but the exact in-product flow for making that assignment — and how the number then gets merged into the mail piece artwork — could not be confirmed from the code reviewed. Verify the actual assignment step in the order/campaign builder before publishing this as a numbered step.