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SIP Response Codes Session Initiation Protocol

SIP (Session Initiation Protocol) is a signaling application layer protocol designed to create, modify, and terminate a multimedia session over the Internet Protocol. It is the most common protocol used in VoIP technology. In SIP, every network element is identified by a SIP URI (Uniform Resource Identifier) which is like an address. They are broken down as 1xx Provisional Responses, 2xx Successfu...
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UK Area Codes

List of UK area codes and phone prefixes Telephone numbers starting 01 and 02 Telephone numbers that start with 01 or 02 are typically used for home or business landlines. Known as 'geographic numbers', they are arranged into a variety of local area codes sometimes also known as 'dialling codes' or 'STD codes'. 0113 Leeds 0114 Sheffield 0115 Nottingham 0116 Leicester ...
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