Remember when every network in Nigeria had its own codes? Checking your balance on MTN was different from Glo, and buying data on Airtel was different from 9mobile. The Nigerian Communications Commission (NCC) fixed this with NCC harmonized short codes. Now the same code does the same job on every network. This guide lists the main codes and explains how to use them.
What Are NCC Harmonized Short Codes?
Harmonized short codes are standard USSD and SMS codes approved by the NCC for all mobile networks. Operators were directed to implement them, with a migration deadline of 17 May 2023. The goal is to make codes easy to remember, reduce confusion and protect consumers.
Whether you use MTN, Airtel, Glo or 9mobile, the codes below work the same way.
Full List of NCC Harmonized Short Codes
| Code | Service |
|---|---|
| 300 | Customer care / help desk |
| *310# | Check airtime balance |
| *311# | Recharge airtime with a PIN |
| *312# | Buy a data plan |
| *321# | Share airtime or data |
| *323# | Check data balance |
| 305 | Stop a service (unsubscribe) |
| 996 | SIM registration and NIN-SIM linkage verification |
| 2442 | Do Not Disturb (DND) |
| 3232 | Mobile number portability |
How to Use the Most Common Short Codes
Check airtime balance: *310#
Dial *310# on any network to see your main balance and some bonus balances.
Recharge with a card: *311#
Scratch your recharge card and dial *311*PIN# to load the airtime.
Buy data: *312#
Dial *312# to see current data plans and prices. On MTN, read our guide to the MTN cheap data code for the best bundles.
Share airtime or data: *321#
Dial *321# and follow the menu to share credit or data with another user on the same network.
Check data balance: *323#
Dial *323# to see your remaining data and expiry date. See our full guide on how to check data balance.
Consumer Protection Short Codes
Do Not Disturb: 2442
Send STOP to 2442 to block unsolicited promotional SMS and calls. Send HELP to 2442 to choose the types of promotions you still want. Learn more in our guide on how to stop MTN from deducting airtime.
NIN-SIM verification: 996
Dial *996# to check the numbers linked to your NIN. Read how to link NIN to SIM if any of your numbers are missing.
Number portability: 3232
The 3232 short code supports mobile number portability, which lets you move your number from one network to another while keeping the same digits.
Do Old Network Codes Still Work?
The NCC said old operator-specific codes would stop working after the migration. In practice, some older codes may still respond on some lines. However, the NCC harmonized short codes are the official ones, so use them first.
Why the NCC Introduced Harmonized Short Codes
- Simplicity: one set of codes for every network.
- Consumer protection: standard codes for DND and unsubscribing make it easier to stop unwanted charges.
- Less confusion: people who switch networks do not need to learn new codes.
- Better complaints handling: 300 connects you to customer care on any network.
Tips for Using Short Codes Safely
- Type codes carefully, including every asterisk and hash.
- Never share recharge PINs, transfer PINs or OTPs with anyone.
- Be careful with codes shared on social media that promise free airtime or data.
- Check your balance with *310# after any unexpected SMS.
Need help with borrowed credit? See our guides on the code to borrow airtime from MTN and the Airtel borrow code.
Frequently Asked Questions
What is the code to check balance on all networks?
Dial *310# for airtime and *323# for data.
What is the customer care number for all networks?
Dial 300 from your line.
What is the DND code in Nigeria?
Send STOP to 2442 for full DND, or HELP to 2442 for partial DND.
When did the harmonized short codes start?
The NCC set a migration deadline of 17 May 2023.
For the official list, visit the Nigerian Communications Commission website.
Oladepo Babatunde (Prince Babatee Tunde) is a Computer Scientist, researcher, and professional content writer with a Higher National Diploma in Computer Science from Kwara State Polytechnic, Nigeria.
With a background in technology and a passion for clear communication, Babatunde specializes in creating thoroughly researched, reader-focused content on productivity, personal development, home living, and technology. Every article he writes is backed by extensive research and fact-checking to ensure readers receive accurate, actionable information.
As a freelance writer, he has helped brands and publications deliver content that educates, engages, and empowers their audiences. His mission at Vibena is simple: make complex topics easy to understand and help Nigerians live smarter, more productive lives.
