How to check your Ooredoo number using USSD

To find your Ooredoo phone number in Algeria, dial *100# on your phone and press call. Your number will appear on your screen within seconds. This works on any Ooredoo line, whether you're on a prepaid or postpaid plan, and you don't need an internet connection.

USSD codes (Unstructured Supplementary Service Data) are short commands that your phone sends directly to Ooredoo's network. Unlike texting or calling, they're instant and don't use your data or credit. The asterisk and hash symbols are standard on every phone keypad.

If *100# doesn't work, try *121# — some Ooredoo accounts respond to this code instead, particularly older lines or those registered before recent network updates. If neither code works, the issue is usually a network glitch rather than a problem with your account.

Key Takeaways

  • Dial *100# and press call to see your Ooredoo number on your screen immediately.
  • USSD codes work without internet or credit and are the fastest way to check your number.
  • If *100# doesn't respond, try *121# — some accounts use the alternate code.
  • You can check your number from any phone by calling your own Ooredoo line and asking the person who answers, or by checking your SIM card packaging or original receipt.

Why you might need to check your Ooredoo number

You may have forgotten your number after getting a new phone, or you might need to give it to someone and want to verify it's correct before sharing. If you've had the same SIM card for years, the number can slip your mind, especially if most people contact you through messaging apps instead of calls.

Checking your number is also useful when setting up two-factor authentication for banking or social media accounts, where you need to confirm the phone number on file matches your actual line. It takes five seconds and removes any doubt.

Other ways to find your Ooredoo number if USSD codes don't work

Check the original packaging your SIM card came in — most Ooredoo SIM boxes print the phone number on the back or inside flap. If you still have the receipt from when you bought the SIM, your number is usually listed there as well.

Call your own number from another phone (a friend's phone, a landline, or even a payphone) and listen to the voicemail greeting or the person who answers. This confirms your number is active and working.

Log into your Ooredoo account online at ooredoo.dz if you have one set up. Your phone number is typically displayed on the account dashboard or in the account settings section. You'll need your username and password.

Visit an Ooredoo shop in person with your ID card. Staff can look up your number in their system using your national identification number or the SIM card itself. This is the slowest option but works if your SIM is damaged or your account has restrictions.

What to do if USSD codes aren't working

If *100# or *121# produce no response, wait a few minutes and try again — network delays are common during peak hours. If you're in an area with weak signal, move to a location with better coverage and retry.

Restart your phone completely. Turn it off, wait 10 seconds, and turn it back on. This refreshes your connection to Ooredoo's network and often fixes temporary glitches that block USSD codes.

Check whether your account has restrictions. If your line is suspended due to unpaid bills or inactivity, some USSD codes may not work. Recharge your account with credit or contact Ooredoo customer service to restore full access.

If you're using a phone that's very old or not commonly sold in Algeria, it may not support USSD codes properly. Smartphones and modern feature phones almost always work, but some basic phones from the early 2000s have compatibility issues. Try the method on a different phone if you have access to one.

Understanding USSD codes and how they differ from other methods

USSD codes are different from SMS (text messages) and regular calls. When you dial a USSD code, your phone sends a request directly to Ooredoo's network, and the network responds with information on your screen. No message is sent to another person, and no call is placed — it's a direct query.

This means USSD codes work even if you have zero credit on your account, as long as your line is active. They also don't count against any data plan or call allowance. The response appears instantly on your screen, usually within 2 to 5 seconds.

Other common Ooredoo USSD codes include *555# to check your balance and *777# to buy credit bundles. Each code performs a different function, but they all work the same way: dial, press call, and wait for the response.

Keeping your number safe once you've found it

Once you know your number, be cautious about sharing it with unknown websites or people. Your phone number can be used to reset passwords on accounts you care about, so treat it like sensitive information.

If you're giving your number to a business or service, confirm they have a legitimate reason for asking. Banks and government agencies need it for verification, but random websites and unsolicited callers usually don't.

If you suspect someone has your number and is using it fraudulently, contact Ooredoo customer service immediately. They can flag your account and monitor for suspicious activity.

Frequently Asked Questions

Does dialing *100# cost anything?

No. USSD codes are free and don't use credit, data, or your call allowance. Ooredoo provides this service at no charge to all customers.

Will *100# work if my phone is out of credit?

Yes. USSD codes work on suspended or zero-credit accounts as long as the line itself is active. If your line has been deactivated for non-payment, you'll need to recharge first.

What if I get an error message instead of my number?

Try *121# instead — some accounts use the alternate code. If both fail, restart your phone and try again. If the problem persists after 30 minutes, contact Ooredoo customer service or visit a shop to check your account status.

Can I check someone else's Ooredoo number using these codes?

No. USSD codes only work on the SIM card in your phone. You cannot use them to look up another person's number. To find someone's number, ask them directly or check your contacts list.

Is my number the same as my SIM card number?

No. Your phone number (what people call you on) is different from your SIM card's ICCID number (printed on the card itself). The *100# code shows your phone number, not the SIM card number.