Prepare input
Keep the source identifier, use one record per row and verify the format with a small sample before a larger task.
Use NumSift to identify available Google Voice and VoIP routing signals in mixed US phone datasets. A VoIP or Google Voice indicator describes routing type at check time; it does not establish the owner or future reachability of a number.

Accurate data. Global reach.
PRODUCT SCOPE
Google Voice number lookup for identify available Google Voice and VoIP routing signals in mixed US phone datasets.
Keep the source identifier, use one record per row and verify the format with a small sample before a larger task.
This page focuses on Virtual-number signal, Carrier and line type, Reachability classification, Number normalization, rather than applying unrelated fields from another product.
Export task time, unknown values and exception states so the result remains reviewable.
SUPPORTED CAPABILITIES
Fields can vary by task. Select only the capabilities the workflow needs and validate a small batch before submitting a full dataset.
Separate available virtual-number or VoIP indicators from mobile, landline and unresolved records.
Add available carrier and line-type data without replacing the source phone number.
Keep reachable, unreachable, unknown and exception states separate instead of forcing a binary result.
Normalize country codes and local formatting while retaining the original value for audit and correction.
RESULT GROUPS
Every result group should remain linked to its source record. Unknown, empty and task-exception values should stay separate instead of being converted into a negative result.
line type, VoIP indicator and provider signal
carrier, line type and network region
reachability state, check time and exception code
original number, normalized number and format status
THREE-STEP WORKFLOW
Preserve source values, normalize obvious format differences, remove exact duplicates and prepare a small sample.
Choose the required items from Virtual-number signal, Carrier and line type, Reachability classification, Number normalization; avoid adding fields the decision will not use.
Check field meaning, task time, unknown values and exceptions before importing structured output into another system.
PRACTICAL USE
Create a dedicated Google Voice dataset for US phone-data qualification, with source identifiers and task timestamps kept beside every result.
Use virtual-number signal, carrier and line type, reachability classification, number normalization as separate review fields so one missing value does not erase the rest of the record.
Export the original identifier, selected result fields, unknown values and exception states together so another team can reproduce the decision.
FAQ
It explains how to identify available Google Voice and VoIP routing signals in mixed US phone datasets, including the supported signal groups, input preparation, result interpretation and review boundaries.
Prepare phone numbers with country codes when available. Keep one source record per row, preserve the original value and normalize obvious formatting differences before a larger task.
This product page covers virtual-number signal, carrier and line type, reachability classification, number normalization. The exact fields available depend on the selected task and may include unknown or empty values.
Use them to separate virtual-number indicators from mobile and landline records. Check task time, field meaning and exception states before importing results into another system.
No. Screening organizes returned technical or account signals. It does not prove a person's identity, create marketing consent or replace the rules that apply to the source data.