http://www.receive-sms-online.info/
https://www.textmagic.com/free-tools/receive-free-sms-online
https://receive-a-sms.com/
http://sms-receive.net/
http://hs3x.com/
http://receive-sms-online.com/
https://www.receivesmsonline.net/
http://freesmsverification.com/
http://www.receive-sms-now.com/
https://receive-a-sms.com/
http://freesmsverification.com/
http://receivesmsonline.com/

Note: Each site has 15+ different tel. numbers :)