Dialing Codes for Selected Countries

International Phone Number Format to Call Houston

To make an international phone call to Houston, TX, you will need to dial a phone number formatted roughly as follows:

International Phone Number Format

ddd	1	aaa	nnn nnnn
international access code	US country code	area code	local subscriber number

Aside from the US country code, all the other dialing code still need to be plugged in.

The international access code (or IDD) will be 1- to 4-digits long, depending on your country. You can find the IDD for selected countries below. If your country is not listed, please look up other IDDs here.

Phone Number Formats for Calling Houston

The phone number formats for making international calls to Houston landline or mobile phone numbers are listed below for selected countries.

Follow country links for additional dialing details. If your country is not listed, you can find general Houston dialing information here.

International Dialing Codes for Selected Countries