Contact phone number: Every family must leave a phone number before starting the race.

联系电话：每个家庭都必须在比赛之前留下一个电话号码。

youdao

You must leave your full name and contact details when you phone.

你打电话时必须留下自己的完整姓名及用于联络的详细资料。

《柯林斯英汉双解大词典》

I must have copied your phone number down wrong so that I can only write an e-mail to contact you.

我一定是把你的电话号码抄错了，所以我只能给你发电子邮件联系你了。

youdao

The three have allegedly been in contact with each other and, in monitored phone conversations, were said to have been aware they were being watched by U.S.authorities.

VOA: standard.2009.09.20

Another way cybercriminals are using the call center is to simply change the contact phone number on an existing account.

FORBES: Cybercriminals Phone It In

Cybercriminals can and do manipulate ANI, making their call appear to be from anywhere, including the original registered contact phone number for a stolen account.

FORBES: Cybercriminals Phone It In

Their contact phone number carries a similar recorded message.

BBC: Party People Cardiff Castle Christmas parties cancelled