Important calls are declined
Unknown numbers make customers hesitate and valuable calls go unanswered.
Whoscall Verified Caller ID
Let customers see your business name, not an unfamiliar number
Verify business calls with Whoscall Verified Caller ID. Show your company name, logo, and verified status on outgoing calls to build trust and improve answer rates.
- Works with existing telephony
- Cloud PBX and SIP Trunk ready
- Managed by a Thai team
Why customers stopped answering your calls
Customers hesitate to answer unfamiliar numbers—even when the call is important.
No caller identity
A standard number does not communicate who is calling before the customer answers.
Brand impersonation risk
Customers may struggle to distinguish your real calls from fraudulent ones.
More repeat-call cost
Teams spend more time following up when answer rates remain low.
What Is Whoscall Verified Number?
A verified business caller identity that helps customers recognize your calls before answering.
Whoscall is a caller-checking app widely used in Thailand. Whoscall Verified Number makes your organization’s numbers show up as your company name + logo + Verified badge on the incoming-call screen, instead of a bare number nobody recognizes.
Turn a number into a trusted brand identity
Display an approved company name, logo, and verified business information.
Add trust to every outbound call
Help customers recognize your brand and distinguish legitimate calls.
Straight talk about display coverage: your name and logo appear primarily on devices that have the Whoscall app installed, not on every phone in Thailand. We recommend pairing Verified Number with other measures, such as calling from a consistent 02 business number and telling customers your contact channels in advance. Display coverage to be confirmed with Whoscall
Get started in three managed steps
No extra hardware to install, no number changes, and no edits to the PBX you already run.
Submit Business Profile
Provide business, logo, and number details.
Verification & Approval
Complete document and number-right verification.
Approval time [XX business days]
Go Live & Monitor
Launch, test, and monitor verified calling.
What you get with Verified Caller ID
Every feature is built for one goal — getting your organization’s calls answered.
Business Profile Display
Clearly show your verified company name and business information.
Included with managed support
Verified Badge
Build confidence with a recognizable verification indicator.
Included with managed support
Multi-Number Registration
Register multiple eligible numbers under one organization.
Included with managed support
Brand Impersonation Defense
Help customers distinguish legitimate business calls.
Included with managed support
Managed Onboarding
Call On Cloud assists with documents and onboarding.
Included with managed support
Works with Your Existing PBX
Compatible with supported Cloud PBX, IP PBX, and SIP Trunk setups.
Included with managed support
Answer Rate
Every unanswered call can cost revenue and customer trust
Answer rate is more than a call-center metric—it is a real cost across the organization.
- Sales and follow-up — Reach customers earlier and reduce repeated call attempts per lead.
- Service and notifications — Deliver appointment confirmations and status updates to the right customer.
- Collections and payment reminders — Call under a verified business identity instead of appearing suspicious.
- Brand experience — Turn every outgoing call into a trusted, verifiable brand touchpoint.
Answer Rate Before/After Verified Number
Build trust, reduce call rejection, and create more successful contact attempts.
Figures are illustrative average results from Whoscall Business Solution customers.
Built for Businesses That Call Customers Daily
Verified Number delivers the most value to businesses that call customers every day.
Finance & Leasing
Finance and lending
Increase confidence in verification and follow-up calls.
Outcome: Faster customer contact and fewer suspicious-call complaints.
Healthcare
Hospitals and clinics
Make appointment reminders easier to recognize.
Outcome: Fewer no-shows and repeat calls.
Logistics & E-commerce
Logistics and e-commerce
Reach recipients efficiently and reduce repeat calls.
Outcome: Fewer returned parcels and redelivery attempts.
Application Documents
Prepare a complete application the first time
Prepare the required documents in advance and send them to our team for a completeness check before submission.
- Company registration certificate — issued within the last 6 months
- VAT registration certificate — signed copy
- Proof of number ownership — invoice or contract showing the number
- High-resolution logo — transparent PNG following the logo guide
- Authorized signatory ID — with power of attorney when applicable
Send documents via: LINE: @calloncloud or email your account manager · Our team checks completeness before submission.
Application document checklistPDF · Complete document list with examples
Business number verification formPDF / DOCX · Company and number details
Logo file specificationPDF · Size, proportions, and clear space
Sample power of attorneyDOCX · Use when authorizing our team
PDPA consent documentPDF · Data use purpose and retention period
Plans & Pricing
Two clear costs with no hidden charges or bundled packages.
Whoscall Annual Fee
Annual identity verification fee for each registered number.
[THB XXX]/ number / year
Paid annually by verified number · Minimum [X] numbers
To be confirmed- Display company name and logo on calls
- Verified identity badge
- Register multiple numbers in one profile
- Volume-based discounts
Service Fee
Call On Cloud document preparation, submission, and follow-up service.
[THB XXX]/ one-time
Paid once during onboarding and not repeated on renewal
To be confirmed- Document completeness check before submission
- Logo formatting to specification
- Submission and status follow-up
- Profile updates through the support team
In following years, only the Whoscall annual fee applies · Figures are structural examples pending product-team confirmation · Prices exclude VAT · The annual Whoscall fee is collected and remitted by Call On Cloud; billing method to be confirmed.
Frequently asked questions
Do customers need the Whoscall app installed to see our company name?
Yes. Your company name, logo, and Verified badge appear primarily on devices that have the Whoscall app installed — not on every phone in Thailand. We therefore recommend using Verified Number alongside other measures, such as a consistent 02 business number and telling customers in advance which channels you call from.
How is Whoscall Verified different from carrier caller name (CNAM)?
Carrier-level caller naming depends on support at the receiving end and usually shows only a short line of text, while Whoscall Verified Number displays through an app the user installs themselves — so it can show your company name, logo, business category, and a badge backed by corporate verification. The two approaches work well together.
Do we need to change our number or move our PBX?
No. The service works at the number-identity display layer and does not affect your PBX configuration, inbound routing, IVR, or call queues. You keep your existing numbers and system, and your company name starts showing as soon as the application is approved. It works with Yeastar P-Series, Grandstream UCM, and Call On Cloud SIP Trunk.
Our company number has already been reported as spam — can that still be fixed?
Business verification makes the number display verified organization information. For a number with a history of many reports, we recommend contacting our team to review its status case by case before applying.
Can we use numbers bought from another provider?
You need to show proof of ownership for every number you want verified — an invoice or contract that states the number, for example. If the number sits with another provider, share the details with our team so we can check the conditions before applying.
How is the company information we submit handled under PDPA?
Documents and information submitted with an application are used only for business identity verification, with internal access controls, sharing limited to what is necessary, and handling in line with Thailand’s Personal Data Protection Act (PDPA).
Which documents do we need to apply?
A company affidavit, a certified copy of the Phor Phor 20 (VAT registration), proof of ownership for the number, a high-resolution logo file meeting the specifications, and the ID card of the authorized signatory (with a power of attorney if someone else acts on their behalf). Our team checks that everything is complete before the application is filed.
How is the service priced?
There are two parts: an annual Whoscall fee for the number-verification right, paid every year based on how many numbers are verified, and a one-time service fee for document handling, charged at sign-up only and not again on renewal. In following years you pay only the annual fee.