Twilio offers Voice and SMS enabled phone numbers globally. While Twilio strives to maintain a broad selection of inventory, you can sometimes run into the issue where the number you're looking for is temporarily out of stock or we do not offer the desired number type in the desired country. 

For how to find our current phone number offerings see Twilio international phone number availability and their capabilities.

Phone number coverage in US and Canada

Twilio currently offers phone numbers in all 50 states in the United States as well as all provinces and major cities in Canada.

In the US and Canada, we are able to provide phone numbers in almost all area codes. However, there are some exhausted area codes in major metropolitan areas that Twilio is unable to offer. An Exhausted area code is when nearly all of the NXX codes in an area code have been assigned to telephone service providers. Exhausted area codes occur industry-wide impacting all providers. This does not mean that all numbers within the NXX codes are actively assigned to customers. You may be able to locate a number with another provider and port it to the provider of your choice.

• NXX, also known as a prefix, refers to a block of 10,000 telephone numbers; represented by the second set of three digits of a telephone number (NPA-NXX-XXXX). 

To help with Exhausted numbers the North American Numbering Plan Administrator (NANPA) has implemented new area codes over the existing ones. These are called overlay area codes. When an area code you are looking for is out of stock, we recommend using overlay area codes as a workaround if one is available. 

Below is a listing of US and Canada area codes which are considered exhausted with Twilio. There are recommended overlays Twilio offers.

• For an inclusive listing of Twilio offered prefixes see: US Prefix Availability
• A complete list of area code overlays within the phone network is here List of area code overlays.

Phone number coverage in the rest of the world

For phone number availability outside the US and Canada please consult our FAQ on the coverage of Twilio’s global numbers. Generally in countries where Twilio offers local phone numbers, you can find them in the top 5 to 10 major cities.

There are a handful of UK area codes which are considered exhausted with Twilio. See the listing below for these.

Exhausted UK Area Codes

Exhausted US and Canada Area Codes