Phone Checks
Checks the phone syntax, carrier, porting history, activity and more.
What it entails
Phone checks track number origination (first_seen), usage recency (last_seen), format validity, and type (business vs. personal). They reveal newly ported or long-dormant numbers and enforce compliance with global numbering plans.
Why it works
Fraud rings exploit freshly ported or seldom-used numbers to register fake accounts. Spoofed or invalid formats and burner lines hinder traceability and facilitate fraud.
Checks
The following are the distinct IDs and types of checks that are included in the Phone Check Package.
PHONE_LAST_SEEN
When the phone was last observed.
| Value | Name | Description |
| ACTIVE | Phone number seen recently | The phone number was seen in the last week. |
| RECENT | Phone number seen within the last year | The phone number was seen within the last year. |
| OLDER | Phone number last seen within the last year | The phone number was last seen within the last year. |
| LONG_AGO | Phone number last seen years ago | The phone number was last seen several years ago. |
| NONE | No phone number available | No phone number available |
PHONE_FIRST_SEEN
When the phone was first observed.
| Value | Name | Description |
| NEW | Phone number recently first seen | The phone number was first observed within the last month. |
| RECENT | Phone number first seen within the last year | The phone number was first observed within the last year. |
| OLDER | Phone number first seen over a year ago | The phone number was first observed more than a year ago. |
| LONG_AGO | Phone number first seen long ago | The phone number was first seen more than five years ago. |
| NONE | No phone number data available | No phone number provided or unable to determine first seen date. |
PHONE_FORMAT_INVALID
Validity of phone format.
| Value | Name | Description |
|---|---|---|
TRUE | Invalid phone number format | The phone number format is invalid, which could indicate a potential fraud attempt. |
FALSE | Valid phone number format | The phone number format is valid and appears to be legitimate. |
NONE | No phone number provided | No phone number provided. |
PHONE_TYPE
Type of phone number.
| LANDLINE | Landline phone number | A traditional fixed phone line often tied to a physical location (e.g., home or office). |
| MOBILE | Mobile phone number | A phone number tied to a personal mobile device, typically used for voice calls, SMS, and data. Personal communication, typically linked to an individual. |
| UNKNOWN | Phone type not known | Phone type not known |
| NONE | Phone type unavailable | Phone type unavailable |
PHONE_DNO_TEXT
Do not text status.
| Value | Name | Description |
|---|---|---|
TRUE | Do not text enabled | The phone number cannot send text messages |
FALSE | Do not text disabled | The phone number can send text messages |
UNKNOWN | Do not text not available | Do not text information not available |
NONE | Do not text not available, no phone number provided | Do not text information not available |
PHONE_DNO_VOICE
Do not call status.
| Value | Name | Description |
|---|---|---|
TRUE | Do not call enabled | The phone number cannot make voice calls |
FALSE | Do not call disabled | The phone number can make voice calls |
UNKNOWN | Do not call not available | Do not call information not available |
NONE | Do not call not available, no phone number provided | Do not text information not available |
PHONE_PORT
Flags numbers that have been recently ported between carriers
| Value | Name | Description |
|---|---|---|
NEW | Phone number newly ported | The phone number has been ported in the last 3 days |
RECENT | Phone number recently ported | The phone number has been ported in the last 30 days |
MODERATE | Phone number ported | The phone number has been ported in the last 90 days |
UNKNOWN | Phone number porting information unavailable | Phone number porting information not available |
Updated 16 days ago
Learn how we help you understand the validity of the incoming fields in the context of Synthetic Identity