Know which campaign generated the call.

Call tracking assigns unique phone numbers to different marketing campaigns, channels, or ad placements so you can identify which campaign generated each inbound call. When a prospect calls the number on your Google Ads landing page versus the number on your billboard, you know which source drove the call. SIPNEX provides the tracking numbers (DIDs) and the CDR data that connects calls to campaigns.

Dynamic number insertion is a JavaScript technique that automatically swaps the phone number displayed on your website based on the visitor's traffic source. A visitor from Google Ads sees one tracking number. A visitor from Facebook sees another. A direct visitor sees your main number. DNI requires a JavaScript snippet on your site and a pool of tracking DIDs provisioned by your carrier.

One unique DID per marketing channel or campaign you want to track independently. Typical setup: one for Google Ads, one for Facebook, one for your website organic traffic, one for each offline campaign (billboard, radio, direct mail). For dynamic number insertion with session-level tracking, you need a larger pool — typically 10 to 50 numbers depending on concurrent website traffic.

Yes. Every tracking DID provisioned by SIPNEX receives A-level STIR/SHAKEN attestation. When a prospect calls your tracking number and you call them back from that number, the outbound call is signed with full attestation. This matters because callbacks from flagged or unattested numbers get lower answer rates.

Yes. SIPNEX supports carrier-level call recording on all DIDs including tracking numbers. Recording is essential for call tracking ROI analysis — listening to tracked calls tells you not just which campaigns generate calls, but which campaigns generate quality calls that convert.

SIPNEX provides real-time CDRs (Call Detail Records) for every call on your trunk, including tracking DIDs. CDRs contain timestamps, duration, calling number, called number (your tracking DID), and disposition. You map the called DID to the campaign it represents. For advanced analytics, integrate CDR data with your CRM or analytics platform.

Call tracking uses standard SIPNEX DIDs — $1 to $3 per month per tracking number for local, $2 to $5 for toll-free. Per-minute inbound charges at standard rates. No special call tracking premium. No platform fee. The tracking logic is in how you use the numbers, not in a separate product. See our pricing page.

SIPNEX provides the carrier-layer infrastructure: tracking DIDs, call routing, CDR data, recording, and STIR/SHAKEN attestation. Platforms like CallRail and Invoca add analytics dashboards, DNI scripts, integrations, and AI transcription on top of carrier infrastructure. If you need the full analytics platform, use CallRail/Invoca with SIPNEX numbers. If you need tracking numbers with CDR data and you build your own analytics, SIPNEX provides the DIDs at carrier-direct pricing without the platform markup.