Phone Intelligence

Reverse Phone Number Lookup

Identify unknown callers, detect spam risks, and surface carrier data, line type, and social footprint from any phone number — worldwide, in seconds.

195+ Countries

Mobile, Landline & VoIP

ISO 27001 Certified

Get Started Free API Docs

Phone Lookup

IRBIS Intelligence Engine

Location

San Francisco, US

Verified

Line Type

Mobile · AT&T

Active

Reputation Score

Safe · 94 / 100

Clean

Social Profiles

4 accounts found

Enriched

What you get

Every signal behind a phone number

A single API call returns a comprehensive identity picture — from carrier data and line type to social footprint and reputation scoring.

Carrier & Location

Identify the network operator, country of origin, and geographic location registered to the number.

Line Type Classification

Determine whether a number is mobile, landline, VoIP, or prepaid — critical for fraud scoring and KYC.

Reputation Score

A composite risk score built from spam databases, fraud reports, and call pattern analysis.

Social Footprint

Discover linked social media accounts, usernames, and online profiles associated with the number.

Owner Identity Signals

Surface name, email associations, and identity data linked to the phone number across public sources.

Activity Status

Check whether a number is currently active, ported, disconnected, or reassigned — updated in real time.

Who uses it

Built for every team that needs to know who's calling

From fraud analysts to marketing ops, phone intelligence is a foundational layer for any business that deals with unknown numbers.

E-Commerce

Verify buyer phone numbers at checkout, flag prepaid or VoIP numbers associated with chargebacks, and reduce payment fraud before it happens.

Finance & Banking

Strengthen customer onboarding with phone validation as part of your KYC stack. Detect SIM-swap fraud and verify contact data accuracy in real time.

KYC & Compliance

Add phone intelligence as an automated layer in your KYC workflow. Flag high-risk line types and cross-reference identity signals without manual review.

Marketing & Lead Gen

Validate inbound lead phone numbers before they enter your CRM. Remove disconnected, invalid, or high-risk numbers to protect sender reputation and ROI.

Investigators & OSINT

Enrich unknown numbers with social profiles, location data, and owner identity signals for investigative research and due diligence workflows.

SaaS Platforms

Integrate phone verification into user registration flows. Block fake signups, detect multi-account abuse, and improve identity confidence scores at scale.

How it works

From number to intelligence in four steps

Submit the number

Pass any phone number via the IRBIS API — mobile, landline, or VoIP, any country

Query data sources

IRBIS queries 50+ carrier databases, spam registries, and social intelligence sources simultaneously

Receive enriched data

A normalized JSON response returns carrier, line type, location, reputation score, and social signals

Act on the intelligence

Feed the data into your fraud system, CRM, KYC workflow, or risk scoring engine automatically

Data signals

Every field returned by the API

All signals are returned in a single normalized JSON response — no stitching required.

Country & RegionAlways returned

Carrier & Network operatorAlways returned

Line type (mobile / landline / VoIP)Always returned

Reputation & spam scoreAlways returned

Social media profilesWhen available

Name & identity signalsWhen available

phone-lookup-response.json

// POST /api/developer/combined_phone { "id": 8821043, "status": "completed", "data": { "phone": "+14155552671", "country": "US", "region": "California", "carrier": "AT&T Mobility", "line_type": "mobile", "is_valid": true, "is_active": true, "reputation_score": 94, "spam_risk": "low", "social_profiles": [ "linkedin", "twitter" ], "name": "J. Anderson" } }

FAQ

Common questions

What is reverse phone number lookup?

Reverse phone lookup lets you find detailed information about a phone number — including carrier, line type, location, reputation score, and associated social profiles — starting from just the number itself.

What signals does IRBIS return for a phone number?

Each lookup returns carrier, country, region, line type (mobile/landline/VoIP), active status, reputation score, spam risk level, linked social media profiles, and owner identity signals where available — all in a single normalized JSON response.

How accurate is IRBIS phone data?

IRBIS sources data from carrier-grade databases and regularly updated registries. Carrier and line type accuracy consistently exceeds 99%. Social and identity signals vary by region and data availability.

Which countries and number types are supported?

IRBIS covers 195+ countries. Supported line types include mobile, landline, VoIP, prepaid, and toll-free numbers. Numbers in standard E.164 international format are accepted.

Is my search confidential?

Yes. All lookups are completely confidential. No record of your query is shared with or disclosed to the owner of the number being researched. ESPY is GDPR-compliant and ISO 27001 certified.

How quickly does a lookup return results?

Carrier data and line type return within seconds. Full enrichment with social signals uses an async job model — typically completing within 15–30 seconds depending on data availability.