Zong Number Check Code
3 Ways to Find Your Zong Number Instantly
The exact USSD code, free My Zong App method, and Pakistan’s 668 PTA service — with troubleshooting for when the code fails and why flash messages disappear.
📅 Verified: May 2025 | ✅ Free — no balance deducted
Method 1: Zong Number Check Code (Fastest)
Zong Number Check Code
*100#
Free • No balance required • Tap to copy 📋
Open your phone dialer
Open the call app — the same screen used to dial phone numbers. This works on any Android or iOS device with a Zong SIM inserted.
Dial *100# and press call
Type *100# exactly as shown. Press the green call button. No spaces, no dashes. The USSD query sends to Zong’s network immediately.
Read the flash message — screenshot immediately
Your Zong number appears as an on-screen notification (flash SMS) within 2–5 seconds. Screenshot it immediately — flash messages disappear when you tap OK or dismiss the notification. They do not save to your SMS inbox.
Flash message dismissed by accident? Dial *100# again. There is no usage limit or charge — you can check your number as many times as needed.
Method 2: My Zong App
The My Zong App (available on Google Play and the App Store) displays your registered Zong number permanently on the account home screen after login — no flash message, no screenshot needed.
Download and open My Zong App
Search “My Zong” on Google Play or App Store. Install the official Zong app (developer: Zong 4G).
Enter your Zong number and verify via OTP
The app asks for your Zong number to send an OTP. If you do not know it, use the USSD method first to get it — then use the app for future reference.
View your number on the dashboard
After login, your full Zong number appears at the top of the home screen alongside your balance and package status.
Method 3: PTA 668 Service (All Networks)
Most powerful method: The 668 service returns every SIM registered to your CNIC across ALL networks — Jazz, Zong, Ufone, and Telenor — in a single SMS reply. It is free and operated by PTA (Pakistan Telecommunication Authority).
Open your SMS app
Create a new text message to the number 668.
Send your CNIC number
Type your 13-digit CNIC number without dashes (example: 3520198765432) as the SMS body. Send to 668. The SMS is free.
Receive the list of registered SIMs
PTA replies within 60 seconds with a list of all phone numbers registered to your CNIC. Your Zong number will appear in this list alongside any Jazz, Ufone, or Telenor numbers.
Important: The 668 service only returns SIMs registered under your OWN CNIC. It cannot retrieve SIMs registered to another person’s CNIC — this would require a court order and is accessible only to law enforcement.
Zong Number Check Code Not Working — Fixes
SIM is not registered
Pakistan’s PTA requires all SIMs to be registered against a CNIC. Unregistered SIMs were blocked in 2012 and periodically since. If *100# fails completely (no response), the SIM may be unregistered or deactivated. Visit a Zong franchise with your CNIC to verify.
Code has been updated by Zong
Zong periodically updates USSD codes. If *100# consistently fails on an active SIM, try *8# or open the My Zong App to find the current code. Zong publishes updated codes in-app before announcing them on its website.
SIM is inserted in wrong slot
Dual-SIM phones: USSD codes execute on the SIM that dials them. Ensure you are dialing from the Zong SIM slot, not the other network’s slot. Check your phone’s dual-SIM settings to set Zong as the default call SIM.
Network connectivity issue
USSD requires basic GSM network coverage (not 4G or data — just voice signal). If you are in a low-signal area, move to a location with at least 1–2 signal bars and retry.
Frequently Asked Questions
What is the Zong number check code?
The Zong number check code is a free USSD string that Zong SIM holders dial to display their own registered phone number as an on-screen message. The primary code is *100# — dial it from your Zong SIM and your number appears within seconds.
Is the Zong number check code free?
Yes. Dialing *100# to check your Zong number costs nothing and does not require mobile data or any minimum balance. USSD codes execute over the GSM signaling channel, which is separate from your data or call balance.
What if the Zong number check code does not work?
If *100# returns an error or no response: (1) confirm your SIM is registered against a valid CNIC — unregistered SIMs are blocked from most services in Pakistan; (2) try an alternative code if Jazz has updated it; (3) open the My Zong App — it displays your number on the account dashboard; (4) send your CNIC to 668 (free SMS) to retrieve all SIMs registered to your CNIC.
Can I check my Zong number without a balance?
Yes. The Zong number check code *100# is free and requires no balance. It works even when your prepaid credit is Rs. 0.
What is Pakistan’s 668 service and how do I use it?
PTA’s 668 service returns all SIM numbers registered against a specific CNIC across all networks (Jazz, Zong, Ufone, Telenor). To use it: send your 13-digit CNIC number (no dashes) as an SMS to 668. The reply arrives within 60 seconds and lists every SIM linked to that CNIC. The SMS to 668 is free.
Why might I not know my own Zong number?
Common scenarios: the SIM was purchased by a family member and transferred to you; the SIM is corporate and the number is managed by an employer; the SIM number changed after a Mobile Number Portability (MNP) transfer; or the SIM was unused long enough that the number was forgotten.
The USSD response disappeared before I could read it — what now?
USSD responses appear as flash messages (on-screen notifications that do not save to the inbox). If you dismissed it accidentally, simply dial *100# again — there is no limit on how many times you can check your number.
Once you have your Zong number, consider checking your Zong balance or activating a Zong internet package. If your SIM has been inactive, the Zong Sim Lagao Offer provides free initial data upon reactivation.