[Home](./index.md) > [sip.js](./sip.js.md) > [UserAgentCoreConfiguration](./sip.js.useragentcoreconfiguration.md) > [viaHost](./sip.js.useragentcoreconfiguration.viahost.md) ## UserAgentCoreConfiguration.viaHost property Via header field host name or network address. Signature: ```typescript viaHost: string; ``` ## Remarks The Via header field indicates the path taken by the request so far and indicates the path that should be followed in routing responses.