HLR lookup API and bulk mobile verification

Find dead mobile numbers before they cost you another call, message or verification check.

Check numbers in real time through the HLR lookup API, or upload a file or existing database for bulk HLR checks. Get network status, current carrier and porting details for every number.

  • Connections to 1,300+ mobile networks
  • 1.4M records in a single bulk upload
  • 100,000-record HLR file in ~15 minutes

Part of: Form verification Data cleansing KYC waterfall Affiliate fraud detection Source audit

Try HLR free See a sample response From £0.0042 per lookup, down to £0.0023 at volume

One bad number can cost you more than once

You pay to acquire the lead. Then you pay to process it, call it, follow it up and send it through other checks.

An HLR lookup gives you network information before those costs build up, so your spend and your team’s time go on numbers that work.

  • Find dead numbers

    See which numbers the network reports as dead and take them out before they reach your CRM, dialler or next campaign.

  • Reduce wasted contact attempts

    Stop paying for calls, SMS and one-time passcodes to numbers that are no longer in service.

  • Retrieve network and porting information

    See the network serving each number now and the network that first issued it, for routing, pricing and risk decisions.

Run HLR in real time or in bulk

Use the same HLR lookup however your numbers arrive: one at a time as they come in, or a whole file at once.

  • Real-time HLR lookup API

    Check a mobile number at registration, checkout, lead capture or onboarding, or call the API from your CRM, dialler or verification workflow. The lookup runs in the background with no extra step for the customer, and responds in around 467ms at the 95th percentile. Spot a dead number before you send an OTP or pay for Mobile network KYC or a SIM swap check.

  • Bulk HLR checks on files and databases

    Upload a purchased lead file or your existing customer database to Phone validation and turn on the HLR option. Each row comes back with its format check, network status, current carrier and porting details, ready to download. Dead numbers come out before the next campaign or dialler run. A typical 100,000-record file completes in around 15 minutes.

Try HLR free See a sample response Create a free account and claim your credits. No card required.

Why choose Provero for HLR

HLR results are only as good as the network route behind them.

Provero works with mobile network operators and specialist network providers in different regions, with connections covering more than 1,300 mobile networks worldwide. Each request is routed according to coverage, speed, result quality and cost, with alternative routes available when required.

You do not have to work out which provider gives the best result for a particular country or carrier. Provero handles the routing and translates each network’s answer into the same response structure.

We have worked with HLR for more than ten years. One API key and one prepaid balance cover single lookups, bulk files and the other Provero checks, with no plan or monthly commitment.

What an HLR lookup tells you about a mobile number

An HLR lookup asks the mobile network about the number itself, rather than checking how it is written. Status is the core result. Network and porting detail comes back where the destination network provides it, so the information available varies by country and network.

  • Network status

    Live, dead or out of network (absent subscriber), or rejected when the number is not a mobile.

  • Current carrier

    The network serving the number now, including after porting. Use it as a mobile carrier lookup for routing and pricing.

  • Original network

    The network the number was originally allocated to, with its country and dialling prefix, where available.

  • Porting

    Whether the number has moved from its original network, and the network it moved to, in the detailed response where available.

  • MCC/MNC and status codes

    Mobile country and network codes, the underlying status and error codes, and whether an error is permanent, in the detailed response.

  • Roaming and network history

    Roaming information is available to approved accounts for fraud screening. Observed network history from earlier lookups can be provided on request where held.

For specific country, roaming or historical coverage, email support@provero.io.

Clear results, with more detail when you need it

Get a straightforward result you can act on, or deeper network information for your integration.

Simple results

See the information you need to check and use your mobile numbers.

  • Live, dead or out of network.
  • Current and original carrier, where available.
  • A clear summary without interpreting telecom codes.

Detailed network information

Get more information for routing, troubleshooting and advanced integrations.

  • Mobile country and network identifiers.
  • Underlying network status and error explanations.
  • Porting details where available.
  • Roaming information for approved accounts.
See how to request each level of detail in the HLR API documentation →

Built for large files and live API traffic

1.4M
records in a single bulk upload
Two checks per record, 2.8 million lookups in one Provero job.
~15 minutes
for a typical 100,000-record HLR file
Standard bulk processing, available without any special configuration.
125,000 in 2m 39s
HLR lookups with high-throughput processing
Configured for time-sensitive workloads. Email support@provero.io before you upload.

How to read each result

Live, dead and out of network are different outcomes, and each calls for a different decision. A failed lookup is different again: it tells you about the route, not the number.

Result What it means What to do
Live What it means: The network reports the number as active. What to do: Keep it. Live is network information: it does not confirm who holds the number or guarantee that a call or message will be delivered.
Dead What it means: The network reports the number as not active. What to do: Remove it from calling and messaging lists before you spend anything more on it.
Out of network What it means: The number is assigned, but the subscriber could not be reached at the time of the lookup (absent subscriber). What to do: Keep it and recheck later. A single result can be temporary.
Rejected What it means: The number is not a mobile, for example Rejected Landline. What to do: Use Phone format validation or another channel for non-mobile numbers.
Failed lookup What it means: The destination network did not answer, was temporarily unavailable or is not supported on the route used. What to do: This is not a subscriber status and says nothing about the number. Retry later, or ask us about coverage for that country.

In the detailed response, error.permanent shows whether an error is permanent. A lookup that failed with a non-permanent error is worth retrying.

What we found when numbers kept coming back absent

A single absent-subscriber result can be temporary. We wanted to know what happens when it is not.

Provero tested roughly one million randomly selected mobile numbers and isolated those that returned absent subscriber on three checks within a 16-hour window, during normal waking hours. We checked that group again after one week and one month. Only 7% of it was observed as reachable during the follow-up checks.

Read the full findings in What is HLR used for? →

How to run HLR lookups through the API or in bulk

The same lookup sits behind both routes.

HLR lookup API

Send a number to POST /api/validate/phone in international E.164 format. The default response is the easy summary; add detailed=true when you need the full payload.

Bulk mobile number verification

In the bulk uploader, upload your file to Phone validation, check the phone number mapping and turn on the HLR option. Download the results when the run completes. For large, time-sensitive files, contact support@provero.io before you upload so high-throughput processing can be configured.

Combine it with other checks

Through the API, Multi-validation can run an HLR lookup alongside other supported checks in one request, with each result returned separately.

HLR API example

POST https://api.provero.io/api/validate/phone

Request

{
  "phone": "+447700900123",
  "route": "standard",
  "detailed": false
}

Easy response

{
  "results": [
    {
      "to": "+447700900123",
      "status": "Live",
      "live": true,
      "dead": false,
      "outOfNetwork": false,
      "currentNetwork": "Example Mobile Network",
      "originalNetwork": "Example Mobile Network"
    }
  ]
}

Illustrative example. +447700900123 is from a range reserved for drama and documentation, and the network names are placeholders, so the result shown is not a real lookup.

Read the full HLR API documentation →

HLR lookup pricing

From £0.0042 per lookup, down to £0.0023 at volume

No plan or monthly commitment. Top up your Provero balance and use it across the checks you need.

Requests / month Rate
0 – 5,000 £0.0042
5,001 – 10,000 £0.0039
10,001 – 25,000 £0.0036
25,001 – 50,000 £0.0034
50,001 – 100,000 £0.00315
100,001 – 200,000 £0.0029
200,001 – 300,000 £0.0026
300,001+ £0.0023

Paid from a prepaid balance that you can spend across any check. See current rates.

Need volume pricing? Email pricing@provero.io.

Related checks

No single check settles whether a record can be trusted. These are the ones people usually run alongside HLR phone verification, each answering a different question about the same record.

See every Provero check →

HLR phone verification FAQ

What is an HLR lookup?

An HLR lookup asks a mobile network what it holds about a number. HLR stands for Home Location Register, the record a network keeps for the numbers it serves. Provero returns whether the number is live, dead or out of network, the network serving it now and the network that first issued it, with porting detail in the detailed response. How much comes back depends on the destination country and network.

What does absent subscriber mean?

The number is assigned, but the subscriber could not be reached on the network when the lookup ran, so the result shows out of network. The phone could be switched off, out of coverage or no longer in use. A single absent result can be temporary, so recheck it before deciding what to do with the number.

How is HLR different from phone format validation?

Phone format validation checks that a number is correctly structured for its country and returns standard formats. It does not contact a network. An HLR lookup asks the mobile network about the number and returns its status and serving network. Format validation is a sensible first step before deciding which numbers need an HLR lookup.

How is HLR different from OTP verification?

OTP verification proves that someone can receive a code on that phone right now. It needs the person in front of you, and every code you send costs money. An HLR lookup runs silently against one number or a whole file and tells you what the network reports about the number. Run HLR first so you stop sending codes to dead numbers, then use OTP where you need proof of possession.

Can HLR help assess lead quality?

Yes. Run a bulk HLR check on each lead file to see how many numbers are dead before you pay to work them, and compare the results by supplier, affiliate or campaign. Where numbers from one source keep coming back absent on repeat checks, that is worth raising with the supplier.

Can I run HLR lookups in bulk?

Yes. Upload a file to Phone validation in the bulk uploader and turn on the HLR option. Each number gets a format check and an HLR result, ready to download when the run completes. A typical 100,000-record HLR file completes in around 15 minutes on the standard service. For time-sensitive files, high-throughput processing can be configured: 125,000 HLR lookups have been completed in 2 minutes 39 seconds. Contact support@provero.io before you upload.

Can I run international HLR lookups?

Yes. Provero routes HLR requests across connections covering more than 1,300 mobile networks worldwide. Supply numbers in international E.164 format. Which details come back, including live status and porting, depends on the destination country and network, and some destinations are not supported. Contact support@provero.io to check coverage for the countries you work with.

Run your first HLR lookup

Create a free account, claim your credits and run HLR phone verification through the API or bulk upload. No card required.

Try HLR free