CheckNumber.AI 
RCS Checker
rcs $1.5 per 10,000 checks
- Core data available
- number, activated, system
- Best for
- Choosing RCS vs. SMS delivery paths
No-code CSV REST API Exportable results
Find RCS / Google Messages Users
Check which numbers support RCS (Google's rich messaging standard) before you launch an RCS campaign.
RCS (Rich Communication Services) is a carrier- and device-level messaging protocol, not a social account — it activates automatically on compatible Android devices rather than requiring a signup. CheckNumber's RCS checker confirms whether a phone number currently has RCS enabled, useful for deciding whether an outreach flow can use RCS's richer message format or should fall back to plain SMS, without ever contacting the number.
E.164
Phone input
$1.5
Per 10,000 checks
CSV + API
Workflow
Submitted number +1206••••5541
RCS status yes / no
RCS Checker No account, number, or SIM required
Every check runs through official platform APIs on our own infrastructure. You never connect, bind, or use your own account, phone number, or SIM card — just upload your list or call the API and get results.
What CheckNumber detects for RCS
RCS account by phone
Confirms whether a phone number has a registered RCS account (yes or no).
Bulk yes/no verdict
Every number comes back with a clear registered or not-registered result, ready to filter and segment.
Device operating system
Returns the available device OS signal as iOS or Android, alongside the RCS registration result.
Passive, no contact
Reads registration signals only. The account holder is never messaged, logged in to, or notified.
What You Can Check
A focused RCS enablement check
Use the RCS task when the required output is a row-level RCS-enabled signal mapped to each submitted E.164 phone number.
| RCS product | Task type | Input | Core data available | Best for | Current price |
|---|---|---|---|---|---|
| RCS Checker API documentation | rcs | Phone numbers in E.164 format | number, activated, system | Choosing RCS vs. SMS delivery paths | $1.5 per 10,000 checks |
Core RCS data
What the RCS task returns
The result file maps one row to each submitted number with the fields below.
Enablement
rcs - Number
- The phone number supplied for the check, in E.164 format.
- rcs
- Whether the number currently has RCS enabled (yes or no).
The rcs field is a boolean signal only — it does not include carrier name, device model, or chat capability details.
Run an RCS batch in three steps
Use the no-code platform for uploaded lists or the REST API for recurring workflows.
- 1
Prepare E.164 numbers
Provide one international phone number per row with country code.
- 2
Create the rcs task
Upload the file or call the API with task_type set to rcs.
- 3
Export mapped rows
Download the completed file and match each result to its source number.
Common Use Case
Improve RCS list quality before outreach
Plan RCS marketing campaigns with confidence, knowing your list is RCS-capable.
No-code CSV REST API Exportable results
Signal 1
Registration check — confirm in bulk whether each phone number is a RCS account.
Signal 2
List quality — keep only real RCS users and drop the rest before outreach.
Signal 3
Privacy-safe — a passive check that never messages, logs in, or notifies the account holder.
RCS FAQ
Can I check phone numbers against RCS in bulk?
Yes. Upload a CSV of up to hundreds of thousands of numbers or call the REST API, then download a result file with a registered or not-registered verdict for every number. You are billed only for successful checks.
Do you check by phone number or email?
RCS is checked by phone number. Upload a list of numbers and each is verified against RCS registration.
Does the check contact or notify the person?
No. The check is passive and reads registration signals only. Nothing is sent to the number, and the account holder is never contacted or notified.
Is there a free trial?
Yes. New accounts receive 1,000 free checks on signup with no credit card, and every check is pay-as-you-go with no monthly fee, and the credits you top up never expire.
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