Carrier name (e.g. T-Mobile USA)
Identify the current or best-known network behind the phone number.
Carrier lookup · Bulk CSV upload · Pay as you go
Free Carrier Lookup: Identify Carrier, Line Type & Country in Bulk
Upload phone lists and return carrier, line type, country, and routing context for each number.
zelnum.com helps SMS and outreach teams enrich phone lists in bulk before campaigns, routing, and CRM cleanup.
Carrier
T-Mobile USA
Type
Mobile
Country
United States
Bulk carrier output
Preview the fields returned for each uploaded row.
Carrier
T-Mobile USA
Line type
Mobile
Country
United States
Status
Bulk lookup ready
Need carrier data for a full list?
Upload a file to return carrier, line type, MNP, activity, and downloadable results.
Lookup fields
What Our Carrier Lookup Returns
Get the carrier intelligence teams need to segment lists, suppress poor records, and clean CRM exports.
Country code & dialing
Return dialing code, country, and normalization context for international workflows.
Line type (mobile, landline, VoIP, toll-free)
Classify numbers before SMS, voice, verification, or risk review decisions.
Number active/disconnected status
Detect numbers that should be suppressed, retried, or reviewed before import.
MNP (ported number) detection
Identify ported numbers so routing follows the current carrier instead of the original assignment.
High-volume lookup
Bulk Carrier Lookup
Upload large contact files and return carrier data in segments your marketing, SMS, or CRM team can use immediately. For messy source files, run Phone List Cleaning or Data Scrubber before carrier enrichment.
Example output
phone,carrier,line_type,country,status,mnp
+14155550198,T-Mobile USA,mobile,US,active,false
+442071838750,BT,landline,GB,active,falseCSV upload up to 10M numbers
Process large files without building a custom lookup pipeline or asking engineering to clean every list.
Product-specific usage pricing
Pay by validation volume with lower unit costs for recurring campaign and CRM cleanup jobs.
Result download formats (CSV/JSON)
Export enriched records for spreadsheets, data warehouses, CRMs, suppression lists, and downstream automation.
Workflows
Use Cases
Carrier lookup is most valuable before you spend on outreach or import outdated data into a CRM. When you specifically need active, absent, disconnected, porting, or roaming signals, use HLR Lookup.
SMS routing optimization
Choose cleaner delivery paths and suppress numbers that are unlikely to receive SMS.
Pre-campaign list segmentation
Split mobile, landline, VoIP, inactive, and ported numbers before a campaign launches.
SMS deliverability
Filter VoIP, landline, and inactive numbers to protect sender reputation before bulk sends.
Cleaning numbers for WhatsApp or Telegram campaigns? Check active status in bulk with our
bulk WhatsApp number checker.
For developers
API Integration
Run bulk carrier lookup jobs via API: CSV in, enriched carrier data out, for list cleaning and SMS routing.
View Carrier Lookup APIcurl -X POST "https://api.zelnum.com/api/v1/detect" \
-H "X-API-Key: YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"product": "hlr-lookup",
"country": "US",
"phones": ["+14155550198", "+442071838750"]
}'Free single lookup
Try Free
Check one phone number before using bulk CSV processing or API integration for production workflows.
Pricing by product and workflow
The pricing catalog lists the price and minimum order for each product. Bulk checks are charged per 10,000 rows; single lookups have a separate per-check rate. Web uploads and asynchronous API jobs use the bulk workflow.
For example, HLR Lookup costs $4 USD per 10,000 rows, with a minimum batch of 2,000. This rate applies to HLR Lookup only.
View all products and pricesAlternative
Compare with Twilio Carrier Lookup
Twilio Lookup is a strong choice inside Twilio-based stacks. zelnum.com is built for teams that want carrier lookup plus bulk CSV, campaign segmentation, and lower-cost high-volume workflows.
Read Twilio alternative| Feature | zelnum.com | Twilio Carrier Lookup |
|---|---|---|
| Single lookup | Yes | Yes |
| Bulk CSV | Native upload up to 10M | Requires custom workflow |
| API | Carrier lookup endpoint | Lookup API |
| Best fit | Bulk validation and campaign teams | Existing Twilio platform users |
FAQ
Phone Carrier Lookup FAQ
Short answers about carrier lookup, MNP, HLR, and data freshness.
How fresh is the carrier data?
Lookups combine network-backed and fresh reference data; for live reachability use HLR Lookup.
Can I detect ported numbers?
Yes. MNP detection helps identify numbers that moved from their original carrier to a current carrier route.
Do you support international?
Yes. Carrier lookup supports international phone workflows, with country coverage depending on carrier data availability.
How is this different from HLR lookup?
HLR lookup is one method for checking mobile network information. Carrier lookup is the broader product result that may include carrier, line type, country, MNP, and active status fields.
Is the data live or cached?
Lookup results can combine live network-backed signals and fresh reference data depending on country, carrier, field, and lookup depth.
Is this a mobile carrier lookup and mobile network operator lookup?
Yes. This is a mobile carrier lookup and mobile network operator lookup | it returns the current MNO behind any number (post-MNP port), country, and line type. Use it for SMS routing decisions and list segmentation.
支柱页
Carrier Lookup
This section covers the long-tail intent "carrier lookup 、free carrier lookup" inside the parent page instead of creating a duplicate URL. It connects the query to Carrier Lookup and gives users a clear next step.
When to use it
Use this section when the list specifically needs carrier lookup 、free carrier lookup rather than a broad product overview.
What to check
Confirm input ownership, phone format, confidence, and the export segment needed downstream.
Where to go next
Open Carrier Lookup or the related API page when this check should run at scale.
长尾产品页
Mobile Carrier Lookup
This section covers the long-tail intent "mobile carrier lookup" inside the parent page instead of creating a duplicate URL. It connects the query to Carrier Lookup and gives users a clear next step.
When to use it
Use this section when the list specifically needs mobile carrier lookup rather than a broad product overview.
What to check
Confirm input ownership, phone format, confidence, and the export segment needed downstream.
Where to go next
Open Carrier Lookup or the related API page when this check should run at scale.
长尾产品页
Phone Carrier Lookup
This section covers the long-tail intent "phone carrier lookup" inside the parent page instead of creating a duplicate URL. It connects the query to Carrier Lookup and gives users a clear next step.
When to use it
Use this section when the list specifically needs phone carrier lookup rather than a broad product overview.
What to check
Confirm input ownership, phone format, confidence, and the export segment needed downstream.
Where to go next
Open Carrier Lookup or the related API page when this check should run at scale.
长尾产品页
Free Carrier Lookup
This section covers the long-tail intent "free phone carrier lookup" inside the parent page instead of creating a duplicate URL. It connects the query to Carrier Lookup and gives users a clear next step.
When to use it
Use this section when the list specifically needs free phone carrier lookup rather than a broad product overview.
What to check
Confirm input ownership, phone format, confidence, and the export segment needed downstream.
Where to go next
Open Carrier Lookup or the related API page when this check should run at scale.
What Is My Phone Carrier?
What Is My Phone Carrier? is answered here for users comparing What Is My Phone Carrier? before using Carrier Lookup. Use lawful lists, check the mapped product page, and keep uncertain records in review.
How to Find Out What Carrier a Phone Number Is
How to Find Out What Carrier a Phone Number Is is answered here for users comparing How to Find Out What Carrier a Phone Number Is before using Carrier Lookup. Use lawful lists, check the mapped product page, and keep uncertain records in review.
Is There a Free Carrier Lookup?
Is There a Free Carrier Lookup? is answered here for users comparing Is There a Free Carrier Lookup? before using Carrier Lookup. Use lawful lists, check the mapped product page, and keep uncertain records in review.
How Accurate Is Carrier Lookup?
How Accurate Is Carrier Lookup? is answered here for users comparing How Accurate Is Carrier Lookup? before using Carrier Lookup. Use lawful lists, check the mapped product page, and keep uncertain records in review.
Trust and data handling
Trust, privacy, and responsible use
Use authorized data only. ZelNum provides verification signals, not identity proof, legal approval, or permission to contact a person.
Contact UsSupport email, what to include with a request, and typical response windows.About ZelNumCompany context, product boundaries, supported workflows, and contact paths.Security and Data HandlingHow uploads, API requests, verification results, and customer responsibilities are described.Privacy PolicyHow account data, uploaded files, support requests, billing references, and privacy choices are handled.Terms of ServicePermitted and prohibited uses, consent requirements, and the limits of the verification service.
Carrier lookup cluster
Related carrier lookup pages
Carrier Lookup GuidePillar guide for carrier data, line type, HLR, and routing use cases.Carrier Lookup APIEnrich phone numbers with carrier data inside product and data workflows.HLR LookupCheck mobile network and reachability signals for validation workflows.Number Portability CheckCheck MNP and portability signals before routing or list screening.Line Type CheckerSeparate mobile, landline, VoIP, and virtual number traffic.Free Carrier LookupPreview carrier and line type signals with a free single-number lookup.How to Find a Phone CarrierIdentify carrier, country, and line type for any phone number.Carrier Lookup for SMS RoutingUse carrier data to route SMS efficiently and reduce failed sends.MNP and Stale Carrier DataWhy ported numbers make carrier data stale and how to re-check.
Delivery modes
Single, bulk, and API options
Use this product for a single-number lookup. When volume grows, move to a bulk file or an API job.
Single lookup
Run a single-number lookup and receive an immediate result.
View lookup toolsBulk checks
Upload CSV or TXT files and export matched, unmatched, duplicate, or review-ready segments.
Explore bulk productsAPI jobs
Run checks from your backend by submitting jobs, polling their status, and downloading results.
Read the API guideAI answer engines
Request an AI summary of ZelNum
Open ZelNum in your preferred AI assistant to review its bulk WhatsApp, Telegram, phone validation, carrier lookup, social account, crypto exchange, CSV upload, and API workflows.
The prompt points assistants to ZelNum.com, live pricing, product pages, and API documentation.