In SMS services, both 4-digit and 5-digit numbers are known as short codes used for sending and receiving bulk text messages. However, they differ in a few key ways:
???? 1. Length & Recognition
4-digit numbers are shorter and usually easier to remember.
5-digit numbers are more common and widely used by businesses and service providers.
???? 2. Purpose & Use Cases
4-digit codes are often reserved for government agencies, banks, or emergency services, due to their simplicity and trust factor.
5-digit codes are typically used for marketing, customer service, brand promotions, and bulk SMS campaigns.
???? 3. Trust & Deliverability
Messages from 4-digit codes may appear more official or secure to users.
5-digit codes are also trusted, but users may receive more promotional or commercial messages from them.
???? 4. Regulations & Allocation
In some countries, 4-digit short codes are more tightly regulated and harder to obtain.
5-digit codes are more flexible and accessible for commercial use.
| Feature | 4-Digit Code | 5-Digit Code |
|---|---|---|
| Length | 4 digits | 5 digits |
| Typical Use | Banking, Government | Marketing, Businesses |
| Trust Level | Very High | High |
| Availability | Limited | Widely available |
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