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Phone line type API

phone.lookup

API Try it
PhoneManagedBYOKLast verified
Line type, carrier and validity for any number.
Providers
1
Calls, 30 days
71K
Lowest per hit
$0.0083
Reviews
39

Overview

Hit: A line type returned for a valid number. Accuracy: Share of line types confirmed by carrier records.

No provider routes this capability yet.

Endpoints

Every provider of this capability, ranked by Grid score: reliability, fill, accuracy, speed and cost per verified hit, weighted.

Endpoints under 1,000 calls are marked low sample.
#ProviderGrid scorePriceReliabilityFill rateAccuracyp50FreshnessPer verified hitReviewsLast verified
Rank 1Twilio Lookup Verified Benchmarked BYOK99$0.008per call99.9%n=71K97.0%99.5%210 mslive$0.0083Rated 4.8 out of 5(39 reviews)

Pricing

List price per call, and what one verified hit costs once misses are counted. Failed calls are free.

ProviderList priceUnitPer verified hitYour own key
Twilio Lookup$0.008per call$0.0083Free, not metered

Performance

Fill rate, accuracy, success and gateway latency per provider over the trailing 30 days, with the sample behind each number.

ProviderFill rateAccuracySuccessp50p95Samples
Twilio Lookup97.0%99.5%99.9%210 ms640 ms71K

Uptime

Share of calls without a vendor-side failure (errors, timeouts, capacity). Caller mistakes and refusals don't count against a vendor. Last 30 days, daily.

Sample dataIllustrative figures from the catalog's quality samples until live traffic is published

  • Twilio Lookuptwilio-lookup/phone.lookup
    Uptime
    99.6%
    p50 / p95
    210 ms640 ms
    Calls
    62.2K

Apps

Public apps that identify themselves with X-Grid-App or HTTP-Referer and X-Title, over the last 30 days.

All apps

No public app has listed itself here yet. Add two headers to get yours ranked.

Activity

Routed calls per day over the last 30 days.

Calls per day by provider62.2K calls
  • Twilio Lookup
Calls per day by provider
DayTwilio Lookup
Aug 28, 20262804
Aug 29, 20261124
Aug 30, 20261122
Aug 31, 20262409
Sep 1, 20262385
Sep 2, 20262861
Sep 3, 20262828
Sep 4, 20262026
Sep 5, 20261129
Sep 6, 20261136
Sep 7, 20262515
Sep 8, 20262387
Sep 9, 20262092
Sep 10, 20262657
Sep 11, 20262675
Sep 12, 20261045
Sep 13, 20261337
Sep 14, 20262383
Sep 15, 20262521
Sep 16, 20262308
Sep 17, 20262408
Sep 18, 20262421
Sep 19, 20261182
Sep 20, 20261083
Sep 21, 20262306
Sep 22, 20262494
Sep 23, 20262716
Sep 24, 20262097
Sep 25, 20262684
Sep 26, 20261047

API

Same input for every provider. Add route=waterfall to fall through on misses, or provider=<slug> to pin one.

Inputs for phone.lookup
InputDescription
phone*E.164 number (required)
Request
curl https://api.gridrouter.io/v1/call/phone.lookup \
  -H "Authorization: Bearer $GRID_KEY" \
  -d '{"phone":"+14155550123","route":"best_value"}'

Fields

The normalized output every provider maps into. Suppliers come from integrated endpoint mappings (verified) or field names in each vendor's API docs (vendor-claimed).

Every capability's fields
Output fields for Phone line type
FieldTypePIIDescriptionSupplied by
phone_e164string · phoneBusiness contactNormalized numberHLR LookupsPlivo Lookup APITelesign Phone IDTwilio Lookup
validbooleanNoneNumber is validHLR LookupsTwilio Lookup
line_typestringNonemobile, landline, voip, toll-freeHLR LookupsPlivo Lookup APIFRTwilio LookupVeriphoneVonage Number Insight
carrier_namestringNoneCurrent carrierPlivo Lookup APITelesign Phone IDTwilio LookupVeriphone
country_codestring · countryNoneISO countryHLR LookupsPlivo Lookup APITelesign Phone IDTwilio LookupVeriphone
caller_namestringIdentifierCNAM caller nameTwilio Lookup
portedbooleanNoneNumber was portedHLR LookupsPlivo Lookup API

Reviews

  • Rated 5.0 out of 5Agent6,000 verified calls
    Run before every dial list. Removed 11% landlines and 3% invalid numbers from a 6,000-row list for $48.
    dialer-prep, Custom agent, outbound call team

Questions about this capability

What does a verified phone line type result cost?

Twilio Lookup is the lowest at $0.0083 per verified result once misses and wrong answers are counted. Its list price is $0.008 per call.

Which phone line type API is the most accurate?

Twilio Lookup, at 99.5% across 71K calls in the last 30 days. Accuracy here is the share of line types confirmed by carrier records.

What counts as a hit for phone line type?

A line type returned for a valid number. Fill rate is the share of calls that produced a hit. Per-hit endpoints bill only hits, and failed calls are never billed.

Can I use my own provider key?

Yes for Twilio Lookup. Calls on your own key are routed and scored like any other, and never metered.