Is +44 an STD code?

What Does +44 Mean When Calling the UK?

If you've ever dialed a UK number from abroad, you've probably seen +44 at the beginning of the number. It's not an STD code—those are the area codes used within the UK, like 020 for London or 0161 for Manchester. Instead, +44 is the country code for the United Kingdom, used when calling from overseas.

Both +44 and 0044 connect you to the UK, but they're used in slightly different contexts. The “+” symbol is a universal placeholder recognized by mobile phones worldwide. When you dial +44, your phone automatically replaces the + with your country’s international exit code—whether that’s 00 in Europe, 011 in the US, or another combination elsewhere. This makes +44 the more convenient and widely recommended format, especially for mobile users.

On the other hand, 0044 is commonly used on landlines, particularly in Europe. Since many landline systems don’t recognize the + symbol, callers manually enter 00 (the international exit code) followed by 44 (the UK’s country code) and then the local number, minus the leading zero.

For example, to call a London number starting with 020 from abroad, you’d dial +44 20 followed by the local digits. Dropping the first zero is key—otherwise, you might end up with an error or a misrouted call.

In short, +44 isn’t an STD code but the standard way to reach the UK from another country. Whether you're using a smartphone or a landline, understanding the difference between +44 and 0044 ensures your calls go through smoothly. And with mobile devices now standard, +44 has become the go-to format for international dialing.