Articles on: Call Flow Features

Using the Caller ID Prefix filter to control call Geo-routing

The Caller ID Prefix feature in Nimbata is designed to help you route incoming calls based on the location of the caller.

By analyzing the prefix (such as country code or area code) of a caller's phone number, Nimbata enables dynamic call routing to the appropriate destination, whether that’s a local office, regional sales team, or franchise location.

This functionality powers Geo-routing, a powerful tool for businesses that serve multiple geographic regions.

Requirements: Available to Marketing and Agency users only.

To use the Caller ID Prefix feature and effectively geo-route your calls, you must have an active Marketing or Agency subscription with us.

What is a Caller ID Prefix?

A Caller ID Prefix refers to the first few digits of a phone number, typically an area code or country code, that indicate where the call is originating from. Nimbata uses this information to determine how to route the call.

E.g.:

A U.S. caller from area code 312 (Chicago) can be routed to your Midwest sales team
A caller from the +44 country code (UK) can be routed to your international support line
A call from area code 305 (Miami) could be routed to your Florida branch

When to Use Caller ID Prefix Routing

This feature is ideal for businesses that:

Operate in multiple regions and want to route calls locally
Support different time zones and need to distribute call loads efficiently
Franchise businesses that want calls directed to the nearest branch
Service providers with regional reps or localized offerings
International businesses handling calls across countries and languages

How Caller ID Prefixing works

Once enabled, Caller ID Prefixes are matched against incoming calls. Based on your geo-routing configuration, calls are then forwarded to the destination number that you've assigned to that prefix or area code. This ensures callers reach the most relevant person or team, improving both the caller experience and your team’s efficiency.

Tip: Caller ID Prefixes may also be used to block entire areas or countries from calling you, either sending caller straight to voicemail or hanging up immediately.

Use case examples

A law firm with offices in New York, Chicago, and Los Angeles routes calls from area codes 212, 312, and 213 to their respective local offices.
An HVAC service company forwards incoming calls from rural area codes to specific field agents responsible for those zones.
A global SaaS provider automatically directs UK-based leads to their London sales team, while North American leads are routed to the U.S. headquarters.

How to set up your Geo-routing preferences using the Caller ID Prefix functionality

In the following example, we'll be assuming that you want to set up a Geo-routing call flow that blocks users from specific countries from contacting you and tells Nimata to hang up immediately. You can also choose to send callers to voicemail or set up multiple phone-answering routes if you're running a multi-location business.

Step 1. Go to Tracking > Call Flows and click on the '+Add' button to create a new call flow.

Step 2. Click on the plus '+' sign and select the Caller ID Prefix functionality from the filters menu.

Step 3. Fill in the Caller ID Prefixes you wish to isolate from the rest in the box highlighted below. Then, click the plus '+' sign and select the action you wish to take from the menu.

Step 4. Go to the Caller ID Prefix box on the right and choose what happens to the rest of the Caller ID Prefixes.

Note: You can set up as many Caller ID Prefix routes as you like.

Step 5. Select what happens to your Caller ID Prefixes, set up your Geo-routing rules as you wish, and get as granular as you like!

That's it! You're all set now!

Updated on: 09/07/2025

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