# SMS

- [Sender ID](/docs/sms/sender-id.md)
- [Types of Sender ID](/docs/sms/sender-id/types-of-sender-id.md)
- [Alphanumeric Sender ID Availability and Registration](/docs/sms/sender-id/alphanumeric-sender-id-availability-and-registration.md)
- [SMS segments and message length](/docs/sms/sms-segments-and-message-length.md)
- [DLR (Delivery Report)](/docs/sms/dlr-delivery-report.md)
- [E.164 number format](/docs/sms/e.164-number-format.md)
- [Link clickability](/docs/sms/link-clickability.md): This page explains how SMS link detection typically works on iOS and Android, what happens when a URL doesn’t include http:// or https://, and how to format links to improve CTR.
- [TLDs recognized by iOS](/docs/sms/link-clickability/tlds-recognized-by-ios.md): This page lists top-level domains (TLDs) that Apple Messages typically recognizes as tappable URLs when the link is written without an explicit scheme (for example: \`example.com\` instead of \`https\`.