Preferences

Phone number

Configure the variable that contains the phone number that will be analyzed.

Usually, the variable "source_phone" from the Incoming Call is used as the input variable, but any other variable that contains a phone number can be used.

If the variable containing the phone number is not the "source_phone", the call attestation information will not be available.

Variables

There are two sets of variables that can be used to route the call in Studio, and these can be seen in the table below. Use them to fill in the relevant "Variables" fields.

  • Phone validation insights.
  • SHAKEN/STIR call attestation.

Validation Insights

Validation Insight

Description

Value type

Value ranges

VOIP

Illustrates whether this phone number is a Voice Over Internet Protocol (VOIP) or a digital phone number.

String

  • "true"
  • "false"
  • "N/A"*

Risky

Points out if this phone number is associated with fraudulent activity, scams, fake accounts, or other suspicious behavior.

String

  • "true"
  • "false"
  • "N/A"*

Valid

Indicates if the phone number is considered valid based on assigned phone numbers available to carriers in the caller's country.

Boolean

  • "true"
  • "false"

Active

Reveals if this phone number is a live phone number that is currently active.

String

  • "true"
  • "false"
  • "N/A"

Leaked

Indicates whether this phone number has recently been exposed in an online database breach or compromise.

Boolean

  • "true"

  • "false"

Status

The phone validation status as a result of the Fraud Score.

String

"SAFE"
"SUSPICIOUS"
"HIGH_RISK"

Carrier

The carrier this phone number has been assigned to, or "N/A" if unknown.

String

  • (the carrier name)
    • null

Country

Indicates the 2-character country code associated with this phone number

String

"US" "PT" "GB"

Spammer

Identifies if the phone number has recently been reported for spam or harassing calls/texts

Boolean

  • "true"

  • "false"

Pre Paid

Indicates if this phone number is associated with a prepaid service plan.

String

  • "true"
  • "false"
  • "N/A"

Line Type

The type of line this phone number is associated with (Toll-Free, Wireless, Landline, Satellite, VOIP, Premium Rate, Pager, etc...) or "N/A" if unknown.

String

  • "VOIP"
  • "Toll-Free"
  • "Wireless"
  • "Landline"
  • "Satellite"
  • "Premium Rate"
  • "Pager"
  • "N/A"

Do Not Call

Indicates if the phone number is listed on any Do Not Call (DNC) list. Only supported in the US and CA.

String

  • "true"
  • "false"
  • "N/A"

Fraud Score

The risk score. It measures how likely a phone number is to be fraudulent.

Integer

Percentage from 0 to 100 with no decimal numbers

  • Fraud scores < 75% are considered Safe
  • Fraud scores >= 75% and < 85% are Suspicious
  • Fraud scores >=85% are High-risk

Recent Abuse

Details whether this phone number has been associated with recent or ongoing fraud.

String

  • "true"
  • "false"
  • "N/A"

Validations (last 24h)

Counts how many times Phone Validation was triggered for this number in the past 24 hours. Particularly useful for detecting fraud risk when there is an unusual number of interactions.

Integer

"15"

Name

Owner's name linked to the phone number via reverse lookup. Helps confirm a user is who they claim to be. Coverage is strongest in the US and Canada.

String

Free-text name, or "" / N/A if no match found

City

City associated with the phone number's registered location. Useful for cross-checking against user-supplied location data or billing address.

String

City name string, or "" if unavailable

Region

State or region tied to the phone number's registered location. Supports geo-filtering and consistency checks against other user-provided data.

String

Region / state name string, or "" if unavailable

Zip-code

Postal code associated with the phone number's registered location. Enables precise address validation and fraud geo-filtering.

String

Postal code string (format varies by country), or "" if unavailable

Timezone

IANA timezone derived from the phone number's registered location. Can be used to detect mismatches between the device timezone and the number's origin.

String

IANA tz string (e.g. America/Los_Angeles), or "" if unavailable

Do not call

Indicates whether the number appears on a Do Not Call registry. Critical for outbound calling and SMS compliance to avoid regulatory penalties.

Boolean

  • true — on DNC list
  • false — not on DNC list

TCPA blacklist

Flag numbers blacklisted under TCPA (US Telephone Consumer Protection Act). Contacting blacklisted numbers can expose the business to significant legal liability.

Boolean

  • true — TCPA blacklisted
  • false — not blacklisted

SHAKEN/STIR Call Attestation

Call attestation

Spoofing detection

Description

TN-Validation-Passed-A

Safe

The service provider has fully authenticated that the customer initiating the call is authorized to use the calling number.

TN-Validation-Failed-A

Save
(Unable to verify)

The service provider has fully authenticated that the customer initiating the call is authorized to use the calling number.
Although the call was attested with a particular status, the final carrier could not confirm that the attestation was the one presented.

TN-Validation-Passed-B

Suspicious

The carrier can authenticate its relationship with the calling customers but cannot verify if the consumer is authorized to use the number

TN-Validation-Failed-B

Suspicious
(Unable to verify)

The carrier can authenticate its relationship with the calling customers but cannot verify if the consumer is authorized to use the number.
Although the call was attested with a particular status, the final carrier could not confirm that the attestation was the one presented.

TN-Validation-Passed-C

High risk

The initiating service provider has authenticated that it placed the call on its network but has no relationship with the caller.

TN-Validation-Failed-C

High risk
(Unable to verify)

The initiating service provider has authenticated that it placed the call on its network but has no relationship with the caller.
Although the call was attested with a particular status, the final carrier could not confirm that the attestation was the one presented.

No-TN-Validation

N/A

The carrier is unable to verify the caller for this phone number country or region.

TN-Validation-Failed

N/A

The carrier is unable to verify the caller for this phone number country or region.