Babble is a British internet telephony service. It was one of the first commercialisations of VoIP technology, appearing in 2004 approximately 6 months after the proprietary Skype opened up interest in telephony over the internet. Operating out of offices in London Docklands, west London and Hertfordshire, Babble is a SIP-based service with interconnections to the ordinary telephone network permitting inbound and outbound calls from its network.