Problem 91. Get the area codes from a list of phone numbers

Created by Cody Team

Solve Later

Given a string of text with phone numbers in it, return a unique'd cell array of strings that are the area codes.
 s = '508-647-7000, (508) 647-7001, 617-555-1212';
then
 a = {'508','617'}
Note: This problem refers to American-style phone numbers. You can assume the first three digits of a ten-digit number will always be the area code.

Solve

Solution Stats

4190 Solutions
1055 Solvers

Last Solution submitted on Nov 28, 2024

Last 200 Solutions

Problem Comments

6 Comments

6 Comments

Show 3 older comments

blaat on 10 Feb 2012

An explanation of common notations of area codes would be nice for us non-Americans :)

Aurelien Queffurust on 30 Mar 2012

I (as French) Agree. A Wikipedia link which would explain supported area codes is definitely missing.

David Verrelli on 14 Dec 2017

"You can assume the first three digits of a ten-digit number will always be the area code." Hmmm.... too bad there was no explanation applying to telephone numbers with more (or less?) than ten digits.

Rafael S.T. Vieira on 12 Jun 2020

The problem fails to mention that the area codes should be sorted, and that phone numbers may have country codes.

Rik on 15 Jan 2021

This isn't about American-style phone numbers, but US-style. Otherwise it would be nice to include other test cases so people would be required to actually parse the country code away. Now it is just a matter of removing a leading 1.

Tran Tran on 31 Jul 2022

Madness of cellfun regexp

Solution Comments

Show comments

Problem Recent Solvers1055

Problem Tags

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Problem 91. Get the area codes from a list of phone numbers

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers1055

Suggested Problems

More from this Author96

Problem Tags

Community Treasure Hunt

Problem 91. Get the area codes from a list of phone numbers

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers1055

Suggested Problems

More from this Author96

Problem Tags

Community Treasure Hunt

Players