Legally, you own your number, and have the right to transfer it. This should still apply if it shuts down.<p>IANAL, but see <a href="https:&#x2F;&#x2F;www.fcc.gov&#x2F;consumers&#x2F;guides&#x2F;keeping-your-telephone-number-when-changing-service-providers" rel="nofollow">https:&#x2F;&#x2F;www.fcc.gov&#x2F;consumers&#x2F;guides&#x2F;keeping-your-telephone-...</a>