Algunos servicios te van a pedir validarlo con un 2FA a un teléfono, estos servicios te permiten recibir esos mensajes de texto sin que tengas un teléfono.

Online SMS: https://sms-online.co/
Text anywhere: http://www.textanywhere.net/
Proovl: https://www.proovl.com/numbers
Receive free SMS.NET: http://receivefreesms.net/
5SIM: https://5sim.net/
Receive SMS Online.IN: http://receivesmsonline.in/
Receive SMS online.EU: http://receivesmsonline.eu/
Groovl: https://www.groovl.com/
1S2U: https://1s2u.com/
Receive SMS online.ME: http://receivesmsonline.me/
Receive SMS: http://sms-receive.net/
Receive SMS Online.NET: https://www.receivesmsonline.net/
Receive free SMS: http://receivefreesms.com/
SMS Get: http://smsget.net/
Receive SMS online: https://receive-sms-online.com/
Receive an SMS: https://receive-a-sms.com/
Pinger: https://www.pinger.com/
7 SIM.NET: http://7sim.net/
Send SMS now: http://www.sendsmsnow.com/
Temporary emails: https://www.temp-mails.com/
Vritty: https://virtty.com/
Free SMS code: https://freesmscode.com/
HS3X: http://hs3x.com/
Get a free SMS number: https://getfreesmsnumber.com/
See SMS: https://www.smsver.com/
SMS.SELLAITE: http://sms.sellaite.com/
Trash Mobile https://es.mytrashmobile.com/numeros

Saludos.