If you’re wondering what to dial to check your Dtac number, this article will help you understand every method for checking your Dtac number, whether you use prepaid or postpaid. Discover easy techniques and essential information for every type of user.
Introduction: Why Should You Check Your Dtac Number?
Many people have experienced forgetting their own phone number, especially after buying a new SIM or not using it regularly. Checking your Dtac number is important for topping up, subscribing to packages, registering on apps, or verifying your identity for various services. Knowing how to check your own or someone else’s number makes life much easier.
How to Check Your Dtac Number Using USSD Code
The fastest and easiest way to check your Dtac number is by dialing a USSD code. This method does not require internet access and is completely free. It works for both prepaid and postpaid SIMs.
- Open the phone app on your device with the Dtac SIM inserted.
- Dial *102# and press call.
- Wait a few seconds. A USSD message will appear on your screen showing your Dtac phone number.
- The message also displays the last 4 digits of the ID card used to register the SIM for verification.
The advantages of this method are its speed, availability anytime and anywhere, and the fact that it’s free.
How to Check Someone Else’s Dtac Number
If you want to check whether a number belongs to Dtac or to identify the network of any phone number, you can use the following USSD codes:
- Dial *102*target number# and press call – the system will tell you if the number is Dtac.
- Dial *812*target number# and press call – the system will tell you which network the number belongs to.
This is useful for checking friends’ or family members’ numbers, or when you want to transfer money, top up, or send promotions.
Comparison Table: How to Check Numbers for All Thai Networks
| Network | Check Number Code | Notes |
|---|---|---|
| Dtac | *102# call | Shows last 4 digits of registered ID |
| AIS | *545# call | For AIS and One2Call SIMs |
| TrueMove H | *933# call | For both prepaid and postpaid |
| NT (my CAT) | *153# call | For NT SIMs |
| Penguin | *504# call | For Penguin SIMs |
This information helps you check phone numbers for any carrier in Thailand easily and for free.
How to Check Your Dtac Number via the Dtac App
If you’re not comfortable with USSD codes or want to see more details (like promotions, balance, or reward points), you can check your number via the Dtac app:
- Download the Dtac app from the App Store (iOS) or Google Play (Android).
- Log in with your Dtac number (if you forgot your number, dial *102# first).
- Wait for the OTP code to verify your identity.
- Once logged in, your phone number will appear on the home page or in your profile menu.
- You can also check your balance, outstanding bills, subscribe to new packages, or view reward points in the app.
The Dtac app is convenient for those with multiple numbers, as you can add up to 20 numbers in one account.
How to Check Your Dtac Number via IVR (Automated Voice System)
For those who prefer voice instructions, you can call Dtac’s automated system for free:
- Call *1002 and press 1 to hear your phone number.
- Call 1678 to speak with a Dtac representative (service fee 3 Baht/call).
IVR is ideal for seniors or those not comfortable with smartphones.
Other Ways to Check Your Dtac Number
- Check the SIM card packaging or card – your number is printed there.
- Call or send an SMS to another device and check the displayed number.
- Check your SIM registration documents if you still have them.
These methods are useful if you can’t use USSD codes or the app.
Useful Dtac Shortcodes and Services
Besides checking your number, Dtac offers many useful shortcodes for checking balances, promotions, and using extra services.
| Service | Shortcode | Details |
|---|---|---|
| Check main/add-on promotions | *1003 call | USSD or *1003 call, press 8 (IVR) |
| Check balance | *101# call | USSD or *1001 call (IVR) |
| Check remaining bonus | *101*5# call | USSD or *1001 call, press 2 (IVR) |
| Top up via card | *100*card code# call | Or *1000 call (IVR) |
| Borrow credit (Jai Dee) | *110*0# call | Check available credit to borrow |
| Transfer credit (Jai Dee) | *112*08XXXXXXXX*amount# call | Transfer credit to another Dtac number |
| Extend validity (Jai Dee) | *113*number of days# call | Add more days to your SIM validity |
| Unsubscribe from ads SMS | *137 call | Cancel all promotional/ads SMS |
| Enable/disable Dtac internet | *104*71# / *104*72# call | Turn internet service on or off |
| Enable/disable Data Roaming | *124*4# / *124*3# call | For using your SIM abroad |
Frequently Asked Questions about Checking Your Dtac Number
- What do I dial to check my Dtac number? Dial *102# and press call. The system will display your phone number.
- Is there any charge? No charge for *102# or *1002. Calling 1678 costs 3 Baht per call.
- Is the method the same for prepaid and postpaid SIMs? Yes, both use the same code.
- What if *102# doesn’t work? It could be a signal issue. Try restarting your phone or use other methods like calling *1002 or checking via the Dtac app.
- Can I check someone else’s Dtac number? Yes, dial *102*target number# to check if it’s a Dtac number.
- If I use multiple SIMs in one device, how do I check the Dtac number? Select the Dtac SIM in your phone app before dialing *102#.
- Does checking via the Dtac app require internet? Yes, you need internet to log in and use the app.
- Can I check my Dtac number abroad? Yes, if your SIM is active and has a signal, you can dial *102# as usual.
Precautions and Additional Tips
- If your SIM is suspended or expired, you won’t be able to check your number via USSD.
- Write your phone number down somewhere safe, like a notebook or in your phone’s contacts.
- If your SIM is lost or stolen, contact Dtac customer service immediately to suspend the SIM and request a replacement.
- For seniors or children, teach them how to check their number using USSD or the Dtac app for convenience.
- Regularly check your SIM’s validity and balance to avoid service interruptions.