1.1¢ per lookup

Carrier lookup API

See the line type before choosing a channel.

Your agent can read a phone number’s carrier and line type. Our public example number returned LiveWire Telecom and fixed VoIP; reachability fields were empty.

One TaskFuel account and prepaid balance. Your agent shows the price before it pays.

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Works with

Compare the two access paths.

The same underlying data family can be used through a direct Twilio account or from a TaskFuel task.

Prices and access checked on 6 November 2026.
OptionPrice & billingChoose it forGood to knowAccess
BlockRun / Twilio LookupThrough TaskFuel$0.011 / lookupPer request from your TaskFuel balanceOne public example number, including carrier and line type.One carrier lookup from the same balance as your other paid tools.The example leaves reachability and identity fields empty.TaskFuel
Twilio LookupDirect provider accountProvider reference$0.008 / lookupDirect pay-as-you-go billingLine Type Intelligence price. Basic formatting/validation is free; own Twilio credentials.Direct control of fields and supported Lookup features.Own credentials. Some data packages and countries require additional access.Direct

Carrier lookup API: what your agent gets.

One public example number. Carrier/type data does not establish owner identity, current reachability or message delivery.

  • Read carrier and line type

    Return the carrier name, country, formatting and line-type intelligence. The example returned fixedVoip.

    $0.011 / tested lookup

Carrier lookup API, tested.

The response returned a carrier, fixed-VoIP classification and a validity flag. Line status and identity fields were empty.

TaskFuel test run ·

Charged $0.011

Your agent asked

Read the carrier and line type for the public example number +15005550006
Data from
BlockRun / Twilio Lookup

What came back

Input
Public example number +15005550006
Carrier
LiveWire Telecom, LLC
Line type
fixedVoip
Validity / line status
valid: true; line_status: null

One public example number. Carrier/type data does not establish owner identity, current reachability or message delivery.

Try the API request Quote first, then run

1. Check the price

Use your TaskFuel API key as TASKFUEL_API_KEY in your terminal or server. Keep it out of browser code. This request checks the price without paying.

The exact request used in the dated example.

curl --fail-with-body https://app.taskfuel.ai/v1/call \
  -H "Authorization: Bearer $TASKFUEL_API_KEY" \
  -H 'Content-Type: application/json' \
  --data-binary @- <<'TASKFUEL_REQUEST'
{
  "url": "https://blockrun.ai/api/v1/phone/lookup",
  "method": "POST",
  "body": {
    "phoneNumber": "+15005550006"
  },
  "dryRun": true
}
TASKFUEL_REQUEST

2. Run the request

Review amount_usd in the quote. To pay and run, change dryRun to false and add maxAmountUsd with that approved amount inside the same JSON object. Keep the inputs unchanged; this limit applies to one call.

3. Read the result

Read line_type_intelligence.carrier_name and line_type_intelligence.type. A valid flag is separate from line_status, caller identity and whether a message can be received.

Setup and API reference · Job polling and timeout recovery

Try it in your next task.

Sign in to TaskFuel and copy the connection prompt into your agent. Approve the connection, then ask for the work you need.

01

Name the task

Tell your agent what the output needs to contain.

02

See the price

Your agent shows the provider and price before spending.

03

Review the response

Check the output against your task. The call reports its cost and remaining balance.

When to use it.

Contact data

Attach the returned line type.

Your agent can add the carrier and line-type fields to a reviewed contact record.

Preparing a communications task

Distinguish mobile, landline and VoIP.

The line type is one input to channel selection. This lookup sends no message and places no call.

Providers for this task.

CapabilityProvidersReference
Check a phone numberBlockRun, 2s, Abstract Phone Intelligence, Fiber AI API, StablePhone, Tomba APICompare providers · Endpoint data

Good Questions.

What does the carrier lookup API return?

The tested response contained carrier name, country, formatted number and line type. It classified the example number as fixedVoip.

Is a valid number necessarily reachable?

The validity flag was true while line_status was null. This test establishes returned formatting and line-type data, with no message or call placed.

Does this identify the owner or detect fraud?

Identity match, caller name, SIM swap and risk fields were empty in this response. The page demonstrates carrier and line type only.

When is Twilio’s direct API a better fit?

Twilio lists Line Type Intelligence at $0.008 per request, below this TaskFuel test’s $0.011 charge. Its direct API suits a dedicated integration with Twilio credentials. Canadian numbers require separate NPAC approval for this data.

What did the carrier lookup cost?

The example cost $0.011 on 6 November 2026. Your agent shows the price for your own request before it pays.

Do I need a separate carrier-data account?

No. Your agent pays from your TaskFuel balance, so there is nothing else to sign up for.

Your agent can do things it couldn’t this morning.

$1 in free credit, no card required.

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