05 - Corporate, VOIP Numbers

There are two types of 05 numbers currently in use in the UK: 055 and 056 numbers. 055 numbers are used for corporate numbering and 056 numbers are used for VOIP numbering.

055 numbers

055 numbers were introduced so that large organizations could buy up blocks of individual phone numbers that they could use for internal phone networks throughout the country. Because of their non-geographic status, 055 numbers worked well for this, but they never became exceptionally popular. Instead, most companies opt to buy up blocks of sequential numbers that have a lot of spare capacity. This means that most companies use 08 or 03 area code numbers instead.

056 numbers

If you get a call from an 056 area code, it’s a VoIP service. Voice Over Internet Protocol is used as an alternative to traditional landlines. VoIP calls require a strong, steady Internet connection to be used instead of a landline. Since 2004, VoIP users have also been able to use 01 and 02 area codes as well, which can be preferential since they reflect local, familiar area codes.

History of 05 area codes

Before 2017, 0550 area codes could be used as toll-free numbers, but this was phased out in favor of the 08 area codes. Any company that was using the 0550 area code was offered an 0808 5 area code instead. While the number was one digit longer, the last six digits were the same as their 0550 numbers.

Cost to call

The cost to call 05 numbers varies widely depending on the caller’s network provider, how the call is being placed, location, and time of day. To avoid surprise charges, callers should contact their provider to see if 05 area codes are included in any free minute plans. Since 05 area codes are considered non-standard, they are not charged the same way. Some will be charged like geographical landlines and some will not.

Prefixes and Providers

CodeProviderAssigned
Loading data…
055 1100Pulsant (Scotland) Limited17/02/2009
055 1101Voiceflex Limited20/09/2007
055 110724 Seven Communications Ltd12/09/2011
055 1110CFL Communications Limited07/04/2014
055 1140BT25/03/2004
055 1143BT30/05/2001
055 1144BT29/11/2000
055 1145BT25/03/2004
055 1146BT25/03/2004
055 1147BT25/03/2004
055 1148BT25/03/2004
055 1149BT25/03/2004
055 1650BT12/02/2002
055 1651BT08/08/2007
055 1654BT11/01/2011
055 1655BT12/02/2002
055 1657BT11/01/2011
055 1658BT11/01/2011
055 1660BT12/02/2002
055 1663BT18/04/2008
055 1664BT08/08/2007
055 1665BT12/02/2002
055 5500FleXtel Limited25/10/2004
055 5505CFL Communications Limited07/04/2014
055 5510FleXtel Limited25/10/2004
055 553724 Seven Communications Ltd07/07/2010
055 5540Andrews & Arnold Ltd10/10/2006
055 5550Nationwide Telephone Assistance Ltd12/09/2006
055 5555FleXtel Limited27/07/2004
055 5556Spacetel UK Ltd29/09/2011
055 5566Syntec Limited21/12/2004
055 5584Network Rail Infrastructure Limited13/01/2005
055 5586Network Rail Infrastructure Limited13/01/2005
055 5588Network Rail Infrastructure Limited13/01/2005
055 5589Network Rail Infrastructure Limited13/01/2005
055 5593Network Rail Infrastructure Limited13/01/2005
055 8830Hutchison 3G UK Ltd17/06/2002
055 8831Hutchison 3G UK Ltd17/06/2002
055 8832Hutchison 3G UK Ltd17/06/2002
055 8833Hutchison 3G UK Ltd17/06/2002
055 8834Hutchison 3G UK Ltd17/06/2002
055 8835Hutchison 3G UK Ltd17/06/2002
055 8836Hutchison 3G UK Ltd17/06/2002
055 8837Hutchison 3G UK Ltd17/06/2002
055 8838Hutchison 3G UK Ltd17/06/2002
055 8839Hutchison 3G UK Ltd17/06/2002
055 8866Business Broadcast Communications Ltd10/11/2009
055 8877Voicetec Systems Ltd13/09/2011
055 8880FleXtel Limited25/10/2004
055 8888Dynamic Mobile Billing Limited10/11/2009
056 0000Magrathea Telecommunications Limited27/09/2004
056 0001Magrathea Telecommunications Limited27/09/2004
056 0002Magrathea Telecommunications Limited27/09/2004
056 0003Magrathea Telecommunications Limited27/09/2004
056 0004Magrathea Telecommunications Limited27/09/2004
056 0005Group 3 Technology Limited13/07/2011
056 0006Barritel Limited08/10/2004
056 0008Numbers Plus Ltd28/07/2011
056 0009TeleMagic Ltd29/07/2013
056 0010Gamma Telecom Holdings Ltd25/03/2014
056 0011FleXtel Limited27/09/2004
056 0015BT14/08/2007
056 0016Icron Network Limited07/08/2006
056 0019BT14/08/2007
056 0020MOBIWEB TELECOM LIMITED09/03/2015
056 0022FleXtel Limited27/09/2004
056 0023Magrathea Telecommunications Limited22/02/2017
056 0025BT05/07/2007
056 0027BT05/07/2007
056 0028BT05/07/2007
056 0030Nexus Telecommunications Limited18/07/2005
056 0033FleXtel Limited27/09/2004
056 0034BT05/07/2007
056 0035Nationwide Telephone Assistance Ltd02/09/2005
056 0036Square Systems Limited07/09/2006
056 0037BT05/07/2007
056 0038Vodafone Ltd (C&W)10/10/2013
056 0039CenturyLink Communications UK Limited09/02/2007
056 0043BT25/10/2004
056 0045Vodafone Ltd (C&W)10/10/2013
056 0046BT25/10/2004
056 0047BT25/10/2004
056 0048BT25/10/2004
056 0049BT25/10/2004
056 0050Atomstream Limited01/04/2011
056 0051Suretec Systems Ltd29/04/2010
056 0053BT05/07/2007
056 0055Lanonyx Telecom Limited13/04/2015
056 0056Invade International Ltd13/01/2016
056 0057Colt Technology Services07/10/2004
056 0058BT05/07/2007
056 0060Citrus Telecommunications Ltd26/11/2010
056 0061MANX TELECOM TRADING LIMITED08/02/2017
056 0062DRD Communications Limited12/10/2004
056 0065Magrathea Telecommunications Limited27/09/2004
056 0066Barritel Limited08/10/2004
056 0067Pulsant (Scotland) Limited17/02/2009
056 0068BT05/07/2007
056 0070BT08/10/2004
056 0071BT28/07/2005
056 0072BT28/07/2005
056 0073BT28/07/2005
056 0074BT28/07/2005
056 0075BT28/07/2005
056 0076BT28/07/2005
056 0077FleXtel Limited28/09/2004
056 0078FleXtel Limited28/09/2004
056 0079BT05/07/2007
056 0080BT08/10/2004
056 0081MANX TELECOM TRADING LIMITED08/02/2017
056 0082MANX TELECOM TRADING LIMITED08/02/2017
056 0083BT05/07/2007
056 008442 Telecom UK Limited11/07/2011
056 0085BT14/08/2007
056 0086Icron Network Limited07/08/2006
056 0087BT14/08/2007
056 0088Callmonitor Ltd27/09/2004
056 0089BT14/08/2007
056 0090AQL Wholesale Ltd20/10/2004
056 0091AQL Wholesale Ltd20/10/2004
056 0092BT14/08/2007
056 0093BT14/08/2007
056 0094BT14/08/2007
056 0095TalkTalk Communications Limited07/02/2005
056 0096Inclarity Communications Limited23/01/2014
056 0098BT14/08/2007
056 0099Gamma Telecom Holdings Ltd15/12/2004
056 0101SKD 4 Limited21/07/2014
056 0102Sala Limited28/02/2006
056 0103Magrathea Telecommunications Limited26/01/2007
056 0104Magrathea Telecommunications Limited26/01/2007
056 0105Magrathea Telecommunications Limited26/01/2007
056 0106Magrathea Telecommunications Limited26/01/2007
056 0107BT14/08/2007
056 0108(aq) Limited trading as aql04/10/2012
056 0109Orange Business Holdings UK Limited27/12/2012
056 0111Andrews & Arnold Ltd10/10/2006
056 0112BT29/11/2006
056 0113BT29/11/2006
056 0114BT29/11/2006
056 0115BT10/11/2005
056 0116BT10/11/2005
056 0117BT10/11/2005
056 0118BT10/11/2005
056 0119BT10/11/2005
056 0120I.T Communications Limited23/05/2016
056 0125BT29/11/2006
056 0126BT29/11/2006
056 0127BT29/11/2006
056 0128Vodafone Ltd (Energis)26/05/2006
056 0129BT29/11/2006
056 0130BT29/12/2005
056 0131BT29/12/2005
056 0132BT29/12/2005
056 0133BT29/12/2005
056 0134BT29/12/2005
056 0135BT29/12/2005
056 0136BT29/12/2005
056 0137BT29/12/2005
056 0138BT29/12/2005
056 0139BT29/12/2005
056 0140BT29/12/2005
056 0141BT29/12/2005
056 0142BT29/12/2005
056 0143BT29/12/2005
056 0144BT29/12/2005
056 0145BT29/12/2005
056 0146BT29/12/2005
056 0147BT29/12/2005
056 0148BT29/12/2005
056 0149BT29/12/2005
056 0150BT29/11/2006
056 0152BT29/11/2006
056 0153BT29/11/2006
056 0154BT29/11/2006
056 0155Affiniti Integrated Solutions Limited22/03/2005
056 0156Connect Telecom UK Ltd17/01/2005
056 0157BT29/11/2006
056 0158BT29/11/2006
056 0159BT29/11/2006
056 0160BT29/11/2006
056 0161BT29/11/2006
056 0162BT29/11/2006
056 0163BT29/11/2006
056 0164BT29/11/2006
056 0165BT29/11/2006
056 0166Premier Voicemail Ltd16/11/2005
056 0167BT29/11/2006
056 0168BT29/11/2006
056 0169BT29/11/2006
056 0170BT29/11/2006
056 0171BT29/11/2006
056 0172BT29/11/2006
056 0173BT29/11/2006
056 0174BT29/11/2006
056 0175BT29/11/2006
056 0176BT29/11/2006
056 0178BT29/11/2006
056 0179BT29/11/2006
056 0182BT29/11/2006
056 0183FTC Telecom Limited25/10/2012
056 0184FTC Telecom Limited25/10/2012
056 0185BT29/11/2006
056 0186BT29/11/2006
056 0187BT29/11/2006
056 0188BT29/11/2006
056 0189BT29/11/2006
056 0190The Excell Group Limited27/09/2006
056 0191BT29/11/2006
056 0192BT29/11/2006
056 0193BT29/11/2006
056 0194BT29/11/2006
056 0195BT29/11/2006
056 0196BT29/11/2006
056 0197BT29/11/2006
056 0198BT29/11/2006
056 0199BT29/11/2006
056 0200TGL Services (UK) Ltd10/02/2015
056 0202Syntec Limited21/12/2004
056 0203(aq) Limited trading as aql04/10/2012
056 0204BT04/10/2007
056 0205BT04/10/2007
056 0206Voiceflex Limited20/09/2007
056 0207Served Up Limited03/06/2008
056 0208Served Up Limited03/06/2008
056 0209BT04/10/2007
056 0210Commi Holdings Ltd16/11/2016
056 0212BT29/11/2006
056 0213BT29/11/2006
056 0214BT29/11/2006
056 0215BT19/05/2006
056 0216BT19/05/2006
056 0217BT19/05/2006
056 0218BT19/05/2006
056 0219BT19/05/2006
056 0222C2C Ltd15/02/2005
056 0223BT19/05/2006
056 0224BT19/05/2006
056 0225BT19/05/2006
056 0226BT19/05/2006
056 0227BT19/05/2006
056 0228BT19/05/2006
056 0229BT19/05/2006
056 0230BT19/05/2006
056 0231BT19/05/2006
056 0232Caladan Communications Limited15/04/2005
056 0233Reality Network Services Limited01/03/2005
056 0234BT19/05/2006
056 0235BT19/05/2006
056 0236BT19/05/2006
056 0237BT19/05/2006
056 0238BT19/05/2006
056 0239BT19/05/2006
056 0240BT19/05/2006
056 0241BT19/05/2006
056 0242BT19/05/2006
056 0243BT19/05/2006
056 0244BT19/05/2006
056 0245BT19/05/2006
056 0246BT19/05/2006
056 0247BT19/05/2006
056 0248BT19/05/2006
056 0249BT19/05/2006
056 0250Easynet Enterprise Services Limited07/02/2005
056 0251BT19/05/2006
056 0252BT19/05/2006
056 0253BT19/05/2006
056 0254BT19/05/2006
056 0255BT19/05/2006
056 0256BT19/05/2006
056 0257BT19/05/2006
056 0258BT19/05/2006
056 0259BT19/05/2006
056 0260BT19/05/2006
056 0261BT19/05/2006
056 0262BT19/05/2006
056 0263BT19/05/2006
056 0264BT19/05/2006
056 0265BT19/05/2006
056 0266BT19/05/2006
056 0267BT19/05/2006
056 0268BT19/05/2006
056 0269BT19/05/2006
056 0270BT19/05/2006
056 0271BT19/05/2006
056 0272BT19/05/2006
056 0273BT19/05/2006
056 0274BT19/05/2006
056 0275BT19/05/2006
056 0276BT19/05/2006
056 0277BT19/05/2006
056 0278BT19/05/2006
056 0279BT19/05/2006
056 0280BT19/05/2006
056 0281BT19/05/2006
056 0282BT19/05/2006
056 0283BT19/05/2006
056 0284BT19/05/2006
056 0285BT19/05/2006
056 0286BT19/05/2006
056 0287BT19/05/2006
056 0288Connect Telecom UK Ltd27/01/2006
056 0289BT19/05/2006
056 0290BT19/05/2006
056 0291BT19/05/2006
056 0292BT19/05/2006
056 0293BT19/05/2006
056 0294BT19/05/2006
056 0295BT19/05/2006
056 0296BT19/05/2006
056 0297BT19/05/2006
056 0298BT19/05/2006
056 0299BT19/05/2006
056 0300Magrathea Telecommunications Limited08/11/2007
056 0301Magrathea Telecommunications Limited08/11/2007
056 0302Magrathea Telecommunications Limited08/11/2007
056 0303Orange Business Holdings UK Limited27/12/2012
056 0305Magrathea Telecommunications Limited15/01/2009
056 0306Magrathea Telecommunications Limited15/01/2009
056 0307Magrathea Telecommunications Limited15/01/2009
056 0308IPV6 Limited22/01/2009
056 0309Zen Internet Limited24/11/2008
056 0310BT04/10/2007
056 0311BT24/04/2008
056 0312BT24/04/2008
056 0313BT04/10/2007
056 0314BT24/04/2008
056 0315BT24/04/2008
056 0316BT04/10/2007
056 0317BT04/10/2007
056 0318BT04/10/2007
056 0319BT04/10/2007
056 0320BT04/10/2007
056 0321BT04/10/2007
056 0322BT04/10/2007
056 0323BT04/10/2007
056 0324BT04/10/2007
056 0325BT04/10/2007
056 0326BT04/10/2007
056 0327BT04/10/2007
056 0328BT04/10/2007
056 0329BT04/10/2007
056 0330BT04/10/2007
056 0331BT04/10/2007
056 0332BT04/10/2007
056 0333BT04/10/2007
056 0334BT04/10/2007
056 0335BT04/10/2007
056 0336Colt Technology Services10/03/2008
056 0337Colt Technology Services10/03/2008
056 0338Colt Technology Services10/03/2008
056 0339Colt Technology Services10/03/2008
056 0340Colt Technology Services10/03/2008
056 0341BT24/04/2008
056 0342BT24/04/2008
056 0343BT24/04/2008
056 0344BT24/04/2008
056 0345BT24/04/2008
056 0346BT24/04/2008
056 0347Magrathea Telecommunications Limited23/08/2010
056 0348BT10/02/2011
056 0349BT10/02/2011
056 0350Atlas Interactive Group Limited16/07/2010
056 0351BT10/02/2011
056 0352BT10/02/2011
056 0354BT10/02/2011
056 0356Digital Mail Limited20/05/2008
056 0357BT24/08/2011
056 0358BT20/09/2011
056 0360Net-Work Internet Ltd15/10/2007
056 0361Voicetec Systems Ltd13/09/2011
056 0362FTC Telecom Limited08/10/2012
056 0363Storacall Technology Limited19/11/2009
056 0364Inet Telecoms Ltd (Voipfone)28/05/2013
056 0365Exa Networks Limited03/07/2008
056 0366Inet Telecoms Ltd (Voipfone)14/08/2008
056 0367Inet Telecoms Ltd (Voipfone)17/08/2010
056 0368Inet Telecoms Ltd (Voipfone)05/03/2009
056 0369Andrews & Arnold (Numbers) Ltd20/05/2010
056 0370Magrathea Telecommunications Limited11/10/2011
056 0372Magrathea Telecommunications Limited10/01/2013
056 0373Cloudcall Limited16/06/2011
056 0374XoverX Ltd08/05/2013
056 0375Colt Technology Services04/05/2016
056 0384Inet Telecoms Ltd (Voipfone)16/04/2014
056 0385Inet Telecoms Ltd (Voipfone)26/01/2016
056 0386Inet Telecoms Ltd (Voipfone)03/02/2017
056 0387Inet Telecoms Ltd (Voipfone)24/07/2018
056 0388Business Broadcast Communications Ltd16/10/2009
056 0389Dynamic Mobile Billing Limited10/11/2009
056 0393Spacetel UK Ltd29/09/2011
056 0394Orange Business Holdings UK Limited29/08/2013

Other UK Phone Codes