FAQ
If your question is not listed, please feel free to contact us.
If you have any problems about receiving SMS
Before sending your inquiry, please make sure to check the following points.
In most cases, you will be able to receive SMS successfully by switching the phone number you use for the service or changing the country of your phone number.
We disclose statistical data on which country phone numbers are able to receive SMS on which services for the past 24 hours.
You can find a suitable alternate country to successfully receive SMS in most services, so be sure to try a phone number from another country.
If your assigned phone number is not working properly, please press the Refund/Change Number button.
Regardless of the reason, the credits used to purchase the phone number will be returned to your account immediately.
We disclose statistical data on which country phone numbers are able to receive SMS on which services for the past 24 hours.
You can find a suitable alternate country to successfully receive SMS in most services, so be sure to try a phone number from another country.
If your assigned phone number is not working properly, please press the Refund/Change Number button.Regardless of the reason, the credits used to purchase the phone number will be returned to your account immediately.
Please be sure to try switching phone numbers 5~10 times, as some providers' phone numbers may have a lower success rate.
We partner with several providers to offer phone numbers and we block such providers with low reception rates sequentially.
If you are unable to purchase a phone number, you may be experiencing a temporary out-of-stock situation.
We are constantly replenishing our inventory, so problems are usually resolved in minutes, but if you need a phone number right away, you can use another country's phone number.
This problem occurs mostly with Chinese phone numbers. The supply of phone numbers in China is very limited due to legal restrictions, but many users place bulk orders, often resulting in a mismatch between supply and demand.
In this case, use a Hong Kong phone number. Most services in mainland China also support Hong Kong numbers.
Alternatively, you can use our API to automatically monitor phone number inventory and place automatic orders as they become available.
We are constantly replenishing our inventory, so problems are usually resolved in minutes, but if you need a phone number right away, you can use another country's phone number.
This problem occurs mostly with Chinese phone numbers. The supply of phone numbers in China is very limited due to legal restrictions, but many users place bulk orders, often resulting in a mismatch between supply and demand.
In this case, use a Hong Kong phone number. Most services in mainland China also support Hong Kong numbers.
Alternatively, you can use our API to automatically monitor phone number inventory and place automatic orders as they become available.
Other means to solve the problem
De volgende korte video laat het volledige proces zien, van het kopen van een telefoonnummer tot het voltooien van de verificatie.
Volg de instructies om het te gebruiken.
Volg de instructies om het te gebruiken.
Het meest waarschijnlijke geval is dat de SMS niet correct wordt verzonden omdat je anonimiseringstools gebruikt. Als je obfuscation tools zoals VPN's, Tor of proxies gebruikt, kunnen veel websites je als een geautomatiseerde bot detecteren en weigeren SMS te versturen. In sommige gevallen kunnen websites expliciet een bericht weergeven waarin staat dat de sms niet is verzonden, terwijl ze het in andere gevallen laten lijken alsof de sms succesvol is verzonden terwijl dat in werkelijkheid niet zo is. Sommige AdBlocker tools gebruiken intern VPN's, wat ook kan leiden tot valse detectie door het systeem.
Veel websites accepteren telefoonnummers uit alle landen, maar sommige websites accepteren vaak alleen telefoonnummers uit specifieke landen. Dit is vooral opvallend bij diensten in China. In dergelijke gevallen voorkomt het kopen van een telefoonnummer uit het verkeerde land dat je SMS ontvangt. Zorg ervoor dat je een telefoonnummer uit het juiste land verkrijgt.
Onze telefoonnummers worden verstrekt in het E.164-formaat, maar sommige diensten ondersteunen mogelijk geen invoer in het E.164-formaat. In dat geval kunt u het telefoonnummer naar het juiste formaat converteren. Bovendien, wanneer u een telefoonnummer invoert, vermijd dan duplicatie van de landcode. Voer bijvoorbeeld in het VK niet twee keer '+44' in. Sommige websites hebben mogelijk al de landcode ingevuld, en alleen het resterende deel van het telefoonnummer wordt gevraagd. Als u zich hier niet van bewust bent, kan de landcode gedupliceerd worden en kan het einde van het telefoonnummer worden afgekapt vanwege het tekenlimiet.
General Questions
You can rent a phone number from your desired country for 20 minutes to receive SMS from a specific service.
The short rental period of just 20 minutes makes this service highly cost-effective compared to traditional phone number rental options. Prices start as low as $0.1 per use.
The short rental period of just 20 minutes makes this service highly cost-effective compared to traditional phone number rental options. Prices start as low as $0.1 per use.
Start by adding funds to your account balance. The minimum deposit amount is $5.
We use Stripe as our payment system, ensuring a safe and fast transaction experience. While your account balance is maintained in USD, you can make payments in any currency of your choice.
After adding funds to your account balance, go to the 'Order Number' section in the left-hand menu. From there, you can rent a phone number from your desired country. And make sure to select the service name that matches the website you are trying to register with when renting a phone number.
We use Stripe as our payment system, ensuring a safe and fast transaction experience. While your account balance is maintained in USD, you can make payments in any currency of your choice.
After adding funds to your account balance, go to the 'Order Number' section in the left-hand menu. From there, you can rent a phone number from your desired country. And make sure to select the service name that matches the website you are trying to register with when renting a phone number.
No, your account balance does not have an expiration date. You can use it whenever you like.
Normally, a phone number that has received SMS from the service before are not going to be rented. However, in rare cases, due to timing or other issues, such a number may still be available for rental.
If this happens, please request a return of the phone number. You will receive a 100% refund, and you can then request the rental of a different phone number.
If this happens, please request a return of the phone number. You will receive a 100% refund, and you can then request the rental of a different phone number.
Some services may have already banned disposable phone numbers.
In this case, the phone number cannot be used, so please proceed with a refund immediately.
After that, by purchasing a new number, you will receive a completely different phone number. Please try again with the new number.
The unusable phone number can be refunded 100% by clicking the REFUND button, so there will be no loss.
In this case, the phone number cannot be used, so please proceed with a refund immediately.
After that, by purchasing a new number, you will receive a completely different phone number. Please try again with the new number.
The unusable phone number can be refunded 100% by clicking the REFUND button, so there will be no loss.
Depending on the timing, phone numbers from certain countries may be out of stock.
In such cases, please search for phone numbers from other countries by clicking "Numbers In Other Country Are Also Available!" on the order page.
Most websites accept phone numbers from around the world, so even if the number is from a country different from where you reside, it should work without any issues.
In such cases, please search for phone numbers from other countries by clicking "Numbers In Other Country Are Also Available!" on the order page.
Most websites accept phone numbers from around the world, so even if the number is from a country different from where you reside, it should work without any issues.
After making a purchase, it may take a few minutes for the balance to be reflected in your account. If the balance is not updated, please check the status of the transaction in Account -> Top-Up Logs and refresh the status.
If the issue persists, contact our support team for assistance.
If the issue persists, contact our support team for assistance.
We regularly distribute promotion codes through our official Telegram channel and other platforms.
Be sure to follow us so you don't miss out!
Be sure to follow us so you don't miss out!
Buy & Manage Numbers
We have a short video tutorial for you.
Follow the steps described in the video to use the phone number.
Follow the steps described in the video to use the phone number.
Select Guidance
The phone numbers are provided in E.164 format.
Some web services may require the phone number to be entered in a local display format, and manual conversion may be necessary like this:
E.164: +12345678900 (United States) -> Local Number: 0234-567-8900
Since the country code for the United States is +1, to convert an international phone number to a local US format, remove the +1 prefix and add a 0 at the beginning of the number.
By entering an E.164 format phone number into our phone carrier lookup tool, you can easily obtain the local format of the phone number.
Some web services may require the phone number to be entered in a local display format, and manual conversion may be necessary like this:
E.164: +12345678900 (United States) -> Local Number: 0234-567-8900
Since the country code for the United States is +1, to convert an international phone number to a local US format, remove the +1 prefix and add a 0 at the beginning of the number.
By entering an E.164 format phone number into our phone carrier lookup tool, you can easily obtain the local format of the phone number.
"Wrong Price" means that when we tried to connect to the phone number provider's API to obtain a number, the purchase amount did not meet the minimum bidding unit in the provider's auction. In this case, you can refresh our site to reflect the latest price and then try purchasing again.
"API error" mainly occurs during the phone number return or refund process. This error happens when the phone number has already received an SMS. If this error occurs even though the message has not yet been reflected on our platform, it will be displayed on the platform the next time we check for new SMS on the number. We check for new SMS every 10 seconds per phone number, so there may be a slight time lag during this interval.
"API error" mainly occurs during the phone number return or refund process. This error happens when the phone number has already received an SMS. If this error occurs even though the message has not yet been reflected on our platform, it will be displayed on the platform the next time we check for new SMS on the number. We check for new SMS every 10 seconds per phone number, so there may be a slight time lag during this interval.
We place phone number orders through a provider auction system. This system dynamically adjusts pricing in real time based on instantaneous demand for phone numbers.
If demand for phone numbers in a specific country increases at the moment you place your order, the price may also fluctuate accordingly.
If you prefer not to pay a higher price for a phone number, you have two options:
- Choose a phone number from a country with less competition.
- Try placing your order again during off-peak hours, such as late at night in Asian time zones, as our customers are primarily concentrated in Asia.
In any case, sudden price spikes are temporary and occur only when demand surges.
If demand for phone numbers in a specific country increases at the moment you place your order, the price may also fluctuate accordingly.
If you prefer not to pay a higher price for a phone number, you have two options:
- Choose a phone number from a country with less competition.
- Try placing your order again during off-peak hours, such as late at night in Asian time zones, as our customers are primarily concentrated in Asia.
In any case, sudden price spikes are temporary and occur only when demand surges.
Unfortunately, no. We only support receiving plain SMS.
Unfortunately, it is not possible to rent a specific phone number. The phone numbers are assigned automatically based on availability. However, you can rent a phone number from your desired country.
Currently, phone numbers are available for short-term rentals with a maximum duration of 20 minutes. Long-term rentals are not available at this time.
It is possible to use the number, but it is not recommended.
A phone number with 0% deliverability indicates that it has not successfully received verification messages for a long time. This could be due to changes in the web service's specifications, which may prevent SMS from being recognized, or measures taken by the service to block disposable phone numbers.
However, even if the deliverability is 0% in one country, it may still be possible to offer phone numbers with higher deliverability in other countries.
Please search for phone numbers from other countries by clicking "Numbers In Other Country Are Also Available!" on the order page.
Most websites accept phone numbers from around the world, so even if the number is from a different country than where you reside, it should work without any issues.
A phone number with 0% deliverability indicates that it has not successfully received verification messages for a long time. This could be due to changes in the web service's specifications, which may prevent SMS from being recognized, or measures taken by the service to block disposable phone numbers.
However, even if the deliverability is 0% in one country, it may still be possible to offer phone numbers with higher deliverability in other countries.
Please search for phone numbers from other countries by clicking "Numbers In Other Country Are Also Available!" on the order page.
Most websites accept phone numbers from around the world, so even if the number is from a different country than where you reside, it should work without any issues.
In order to provide equal access to phone numbers for all users and prevent fraudulent phone number purchases/returns, the following rate limits are currently in place:
Purchases: 7 times within 15 minutes / After 7 purchases within the last 15 minutes, 429 error will occur when you're trying to buy new number.
Returns: 7 times per hour / After 7 returns within the last hour, 429 error will occur when you're trying to buy new number.
* this limitation applies only to new phone number purchases, and there is no limit on returning purchased phone numbers.
If you require a temporary lifting of the above rate limits, you may request it by contacting us at [email protected].
Since it's not possible to determine whether a phone number is being properly used in the service, we do not resell the same number for the same service even if it did not receive SMS and refunded by user.
This limitation is implemented to prevent inventory depletion that could occur if someone maliciously purchases and returns large quantities of phone numbers.
Purchases: 7 times within 15 minutes / After 7 purchases within the last 15 minutes, 429 error will occur when you're trying to buy new number.
Returns: 7 times per hour / After 7 returns within the last hour, 429 error will occur when you're trying to buy new number.
* this limitation applies only to new phone number purchases, and there is no limit on returning purchased phone numbers.
If you require a temporary lifting of the above rate limits, you may request it by contacting us at [email protected].
Since it's not possible to determine whether a phone number is being properly used in the service, we do not resell the same number for the same service even if it did not receive SMS and refunded by user.
This limitation is implemented to prevent inventory depletion that could occur if someone maliciously purchases and returns large quantities of phone numbers.
Yes, you can receive an unlimited number of SMS within the 20-minute validity period. However, please note the following:
- Only one SMS can be received at a time. After receiving an SMS, you must click the "Receive another SMS" button to purchase an additional reception right. The cost for additional SMS reception is 10% of the original phone number purchase price.
- You can make unlimited SMS requests within the 20-minute validity period, but the validity of the phone number will not be extended beyond the initial purchase time.
- Once you click the button, the payment is processed immediately, and charges for additional SMS requests cannot be canceled.
This FAQ covers matters related to refunds for purchased phone numbers. For information regarding refunds of topped-up balances, please refer to the FAQs under "About balance."
If no message is received within the 20-minute validity period, you can request a refund after more than 2 minutes have passed since the rental started. In this case, 100% of the amount will be refunded to your account balance.
You can also check the Deliverability before purchasement. This indicates the percentage of SMS successfully delivered from that service. Please use phone numbers with high Deliverability for the country/service combination.
Please note that refunds cannot be issued if a code is received, regardless of whether it was used correctly. This is because our system cannot verify if the code was used properly.
If no message is received within the 20-minute validity period, you can request a refund after more than 2 minutes have passed since the rental started. In this case, 100% of the amount will be refunded to your account balance.
You can also check the Deliverability before purchasement. This indicates the percentage of SMS successfully delivered from that service. Please use phone numbers with high Deliverability for the country/service combination.
Please note that refunds cannot be issued if a code is received, regardless of whether it was used correctly. This is because our system cannot verify if the code was used properly.
Balance & Your Account
We only collect email addresses or Google accounts for user authentication, and we do not retain any other information. Additionally, we allow the use of highly anonymous cryptocurrencies such as Monero or DASH for balance top-ups.
Stripe requires advanced identity verification using CVC and 3D Secure to prevent fraudulent credit card use. If multiple attempts to verify the credit card owner fail, Stripe will automatically block your credit card. Please try making the payment again with a different credit card or use cryptocurrency for the transaction.
If the payment amount is insufficient, for example, if only the amount after network fees has been paid, Cryptomus will automatically place your payment on hold. In this case, please pay the remaining amount or contact us at: [email protected].
We offer a discount on phone number purchases based on the total cumulative deposit amount as a benefit to our valued customers.
This discount is automatically applied when you make a deposit that exceeds a specified threshold, without the need for any application. There is no expiration date for this discount, and it is available permanently.
You can check the current discount amount in real-time on the Top-Up window.
This discount is automatically applied when you make a deposit that exceeds a specified threshold, without the need for any application. There is no expiration date for this discount, and it is available permanently.
You can check the current discount amount in real-time on the Top-Up window.
Current terms and conditions are described below.
The Terms of Service may be subject to changes based on economic conditions and legal regulations. Any changes will take effect from the moment they are published on our website.
API keys
By using an API key, you can automate anything that can be done on the SMSOnline Premium web platform.
- Making top-up with crypto
- Obtaining a list of available countries/services
- Purchase and refund of phone numbers
- Monitoring of SMS received by purchased phone numbers
Yes, all users who sign up for SMSOnline are entitled to use the API.
However, to prevent abuse of obtaining phone numbers using API keys, manual approval by SMSOnline is required only for the first time. Please send an email to [email protected] from the email address you signed up with to receive the right of API key issuance.
Once approved, you can manage your API key on the web yourself.
However, to prevent abuse of obtaining phone numbers using API keys, manual approval by SMSOnline is required only for the first time. Please send an email to [email protected] from the email address you signed up with to receive the right of API key issuance.
Once approved, you can manage your API key on the web yourself.
Access via API has the following advantages over online platforms.
- No rate limit: The web client has a rate limit on the number of phone numbers that can be purchased every 15 minutes, but the API does not.
- Programmatic accessibility: The web client is human-accessible and prohibits access by programs and bots; the API version allows programmatic and automated access to phone numbers.
- As you like: Our API is RESTful and can be used with Go, Node, Python, Ruby, C#, PHP, whatever your favorite language is.
Transcomm S.R.L.
Bulevardul Constantin Negruzzi 4/2, Chișinău, Moldova
Bulevardul Constantin Negruzzi 4/2, Chișinău, Moldova