| Failed | |
| 1 (Data Constructor) | Twilio.Call |
| 2 (Data Constructor) | Twilio.Message |
| 3 (Data Constructor) | Twilio.Transcription |
| fallbackMethod | Twilio.Calls |
| fallbackURL | Twilio.Calls |
| Feedback | |
| 1 (Type/Class) | Twilio.Message.Feedback |
| 2 (Data Constructor) | Twilio.Message.Feedback |
| 3 (Type/Class) | Twilio.Call.Feedback |
| 4 (Data Constructor) | Twilio.Call.Feedback |
| FeedbackSummary | |
| 1 (Type/Class) | Twilio.Calls.FeedbackSummary |
| 2 (Data Constructor) | Twilio.Calls.FeedbackSummary |
| FeedbackSummaryIssue | |
| 1 (Type/Class) | Twilio.Calls.FeedbackSummary |
| 2 (Data Constructor) | Twilio.Calls.FeedbackSummary |
| FeedbackSummarySID | Twilio.Types.SID, Twilio.Types, Twilio, Twilio.Calls.FeedbackSummary |
| FI | Twilio.Types.ISOCountryCode, Twilio.Types, Twilio |
| filterEmpty | Twilio.Internal.Parser |
| firstPageURI | Twilio.Types.List, Twilio.Types, Twilio |
| Foreign | Twilio.Types.AddressRequirement, Twilio.Types, Twilio |
| forwardedFrom | Twilio.Call |
| FR | Twilio.Types.ISOCountryCode, Twilio.Types, Twilio |
| friendlyName | |
| 1 (Function) | Twilio.APIKey |
| 2 (Function) | Twilio.Account |
| 3 (Function) | Twilio.Address |
| 4 (Function) | Twilio.Application |
| 5 (Function) | Twilio.AuthorizedConnectApp |
| 6 (Function) | Twilio.AvailablePhoneNumber |
| 7 (Function) | Twilio.Conference |
| 8 (Function) | Twilio.ConnectApp |
| 9 (Function) | Twilio.IncomingPhoneNumber |
| 10 (Function) | Twilio.OutgoingCallerID |
| 11 (Function) | Twilio.Queue |
| 12 (Function) | Twilio.Queues |
| 13 (Function) | Twilio.ShortCode |
| 14 (Function) | Twilio.UsageTrigger |
| from | |
| 1 (Function) | Twilio.Call |
| 2 (Function) | Twilio.Calls |
| 3 (Function) | Twilio.Message |
| Full | Twilio.Account |