| 1 | IsMailable | IsMailable indicates that the address of the contact has been standardized and is of mailable format. |
| 2 | IsConnected | IsConnected indicates the phone number has a registered subscriber and is dialable. |
| 3 | IsPorted | IsPorted indicates the phone number has been ported to a new or existing carrier. This is common among wireless subscribers, and users who wish to retain their phone number when switching phone device (e.g. Landline to Wireless). |
| 4 | IsWireless | IsWireless indicates the phone number is assigned to a wireless device. |
| 5 | IsUnknownContact | IsUnknownContact indicates subscriber information is unavailable for the provided phone number. |
| 6 | IsUnknownProvider | IsUnknownProvider indicates provider information was unavailable for the provided phone number. |
| 7 | IsTollFreeNumber | IsTollFreeNumber indicates the provided number is a Toll Free Access number. |
| 8 | IsGoogleVoiceNumber | IsGoogleVoiceNumber indicates the provided number is a registered Google Voice number. There is increased risk for fraud with Google Voice numbers from operators overseas. |
| 9 | IsSkypeNumber | IsSkypeNumber indicates the provided number is a registered Skype number. There is increased risk for fraud with Skype numbers from operators overseas. |
| 10 | IsPossibleDisconnected | IsPossibleDisconnected indicates the provided number does not have current subscriber information assigned but historical information was found. |
| 11 | IsPortableVOIP | IsPortableVOIP indicates the registered phone carrier provides local phone number registration without physical address. There is increased risk of fraud with portable voip numbers from operators overseas. |
| 12 | IsPossiblePortableVOIP | IsPossiblePortableVOIP indicates the registered phone number is likely assigned to a carrier which provides local phone number registration without physical address. There is increased risk of fraud with portable voip numbers from operators overseas. |
| 13 | IsDisconnected | IsDisconnected indicates a number is not dialable. |
| 14 | IsActive | IsActive indicates a number that is seeing active traffic. An active number indicates a number more likely to be picked up by the line owner, which can give companies a stronger indication to companies about the reachability of their clients. |
| 15 | IsInactive | IsInactive indicates that a number is not seeing active traffic. An inactive line is a line not likely to be picked up by the line owner making contact more difficult. |
| 16 | IsPrepayNumber | IsPrepayNumber indicates a phone line is on a pay as you go plan. Numbers with this indicator are harder to connect to and have a higher chance of fraud. |
| 17 | IsPager | Indicates that the number belongs to a pager, which are still sometimes used by doctors and other on call individuals. |
| 900 | INA | For internal use by Service Objects. |
| 901 | INB | For internal use by Service Objects. |
| 902 | INC | For internal use by Service Objects. |
| 903 | IND | For internal use by Service Objects. |
| 904 | INE | For internal use by Service Objects. |
| 905 | INF | For internal use by Service Objects. |