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ActionTwilioUpdated June 2026

How do I look up a phone number with Twilio?

Short answer: You can lookup phone number in Twilio by hand from its own interface, but it won’t repeat itself. On TinyCommand, add the Twilio Lookup Phone Number action to a workflow, map its 2 inputs from any upstream app, and it runs automatically every time the trigger fires. No code, and a free tier to start.

Lookup Phone Number in Twilio — start free All 7 Twilio actions
Lookup Phone Number in Twilio — start free
Inputs

The fields this action accepts.

Every field can be mapped from an upstream trigger, AI step, table row, or hard-coded literal.

FieldTypeRequiredDescription
Phone Number
phone_number
stringRequiredE.164 format
Lookup Type
fields
optionsOptionalLookup Type. Options: Line Type (mobile/landline/VoIP), Caller Name (CNAM), Validation
Sample request
{
  "phone_number": "+15551234567",
  "fields": "{{trigger.fields}}"
}
Returns
{
  "valid": true,
  "country_code": "US",
  "phone_number": "+15551234567",
  "national_format": "(555) 123-4567",
  "calling_country_code": "1",
  "line_type_intelligence": {
    "type": "mobile",
    "carrier_name": "T-Mobile"
  }
}

Use these fields in downstream nodes for routing, logging, or error handling.

Triggered by

Apps that pair well as the trigger for Lookup Phone Number.

Any of these apps can fire this action as part of a workflow.

Gmail → Twilio
1 Gmail triggers
Slack → Twilio
13 Slack triggers
Google Sheets → Twilio
2 Google Sheets triggers
HubSpot → Twilio
18 HubSpot triggers
FAQ

Questions about Lookup Phone Number.

What does the Lookup Phone Number action do in Twilio?
Looks up information about a phone number via Twilio Lookup: country, carrier, line type (mobile/landline/voip), and validity. Use to filter signups, fraud-score, or pre-validate before sending SMS.
What inputs does Lookup Phone Number require?
Required: Phone Number. Every input accepts a static value or a variable from any upstream node in your workflow.
Can I use dynamic inputs from earlier workflow nodes?
Yes. Any field on this action can pull values from upstream nodes, whether that's a form response, a trigger payload, an AI output, or a lookup result.
What happens if Twilio returns an error?
The workflow pauses on the failed node, the error message is captured in the run log, and you can retry the run with one click. Auto-retry policies are configurable per workflow with exponential backoff up to 5 attempts.
Does Lookup Phone Number support batch operations?
Yes. Run Lookup Phone Number inside a Loop node to process arrays. TinyCommand handles Twilio's rate limits automatically so you don't have to throttle manually.
More actions

Other Twilio actions.

Action
Get Call
Retrieves details about a specific Twilio call by SID: from, to, duration, status, price, and recording info. Used to read back details after a webhook fires.
Action
Get Message
Retrieves details of a sent Twilio message by SID with status (queued, sent, delivered, undelivered, failed), price, and error code. Used to reconcile sends with carrier-reported state.
Action
List Calls
Lists call records from your Twilio account with filters for to, from, status, and date range. Used for usage reports, billing reconciliation, or quality monitoring.
Action
List Messages
Retrieves a list of sent and received messages on your Twilio account, with filters for to, from, status, and date sent. Used for audit and reporting.
Action
Make Call
Initiates an outbound phone call via Twilio. The call flow is driven by either a TwiML URL or by passing inline TwiML; required to specify either url or twiml.
Action
Send SMS
Sends an SMS (or MMS, by adding MediaUrl) via Twilio to the destination number. US/Canada destinations require 10DLC or short-code registration to avoid carrier filtering.
Lookup Phone Number in Twilio — start free