# Phone number lookup · Carrier, line type, and porting in one call

## A number enters.  A contact path emerges.

Inspect the base record and the difference between serving and issuing networks.

International numberLocal format
Phone number lookup `Example lookup · Signup 1048`
NL
PHONE NUMBER

### +31 6 1234 5678

Mobile · Netherlands

Serving network
Vodafone

Issuing network
KPN

Base flag
`ported`

KPN Vodafone The serving network differs  from the issuing network.

Base response Answered

```
phone_number: "+31612345678"
country_code: "NL"
line_type: "mobile"
flags: ["ported"]
```

### Prepare the recipient check

The number is a mobile line with network context. Verify recipient control separately before granting account access.

Next: verify the recipient

One base lookup. Add-on properties are not required.

[Explore phone number lookup](/docs/guides/lookup/phone-numbers)
Interactive illustration with fictional records. No account operation is performed.

[Explore Lookup phone number lookup →](/docs/guides/lookup/phone-numbers)

[Line type Choose an appropriate next step for the type of number. →](/docs/guides/lookup/phone-numbers)

[Carrier lookup Find the serving and issuing networks for a phone number. →](/docs/guides/lookup/phone-numbers)

[Network presence Check the network-presence information available for a number. →](/docs/guides/lookup/phone-numbers)

[Explore Lookup →](/lookup-api)

## Scale without  losing control.

Organize teams in workspaces, control API access, and trace changes through audit logs.

Harbor Organization
Workspaces Production Sandbox

### Delivery agent

API key · Customer operations team
Active
Permissions Access
Email Read & write
SMS Read & write
WhatsApp Read Read & write
AL Alex Lee Admin  Permissions updated

### Audit log

Production
 API key updated Alex Lee · 09:42:18 UTC

Workspace
Production

Resource
Delivery agent

WhatsApp
Read Read & write

Succeeded

 [Workspaces](/docs/guides/workspaces)[Team roles](/docs/guides/users-teams-roles)[API authentication](/docs/guides/authentication)
[Explore Enterprise](/enterprise)

## Start with Lookup. Build across channels with Bird.

[Get started](/dashboard/signup?returnTo=%2Fdashboard%2Fw%2Flookup) · [Contact Sales](/demo?product=lookup)

[Email](/email-api) · [SMS](/sms-api) · [WhatsApp](/whatsapp-api) · [Apple Messages](/apple-messages-api) · [Voice](/voice-api)



## Related resources

- [Phone number lookup: check a number before you send](/learn/lookup/phone-number-lookup-check-a-number-before-you-send) (video)
- [Lookup overview](/docs/guides/lookup/overview) (docs)

[Get an implementation brief](/learn/workspace?topic=lookup)