This page contains information about which telephone companies the various 03451 numbers are allocated to.
| First Digits | Status | Communications Provider | Change |
|---|---|---|---|
| 0345 100 | Allocated | Verizon UK Ltd | 04/2007 |
| 0345 101 | Allocated | Verizon UK Ltd | 04/2007 |
| 0345 102 | Allocated | Verizon UK Ltd | 04/2007 |
| 0345 103 | Allocated | Verizon UK Ltd | 04/2007 |
| 0345 104 | Allocated | Verizon UK Ltd | 04/2007 |
| 0345 105 | Allocated | Verizon UK Ltd | 04/2007 |
| 0345 106 | Allocated | Verizon UK Ltd | 04/2007 |
| 0345 107 | Protected | - | - |
| 0345 108 | Protected | - | - |
| 0345 109 | Protected | - | - |
| 0345 110 | Allocated | Affiniti Integrated Solutions Ltd | 05/2007 |
| 0345 111 | Allocated | Virgin Media Wholesale Limited | 10/2009 |
| 0345 112 | Allocated | Virgin Media Wholesale Limited | 10/2009 |
| 0345 113 | Allocated | Virgin Media Wholesale Limited | 10/2009 |
| 0345 114 | Protected | - | - |
| 0345 115 | Allocated | Alphatalk Ltd | 04/2011 |
| 0345 116 | Allocated | Phone Buddy Limited | 04/2014 |
| 0345 117 | Allocated | Virgin Media Wholesale Limited | 10/2009 |
| 0345 118 | Protected | - | - |
| 0345 119 | Protected | - | - |
| 0345 120 | Allocated | Affiniti Integrated Solutions Ltd | 05/2007 |
| 0345 121 | Allocated | Affiniti Integrated Solutions Ltd | 05/2007 |
| 0345 122 | Allocated | Affiniti Integrated Solutions Ltd | 05/2007 |
| 0345 123 | Allocated | Affiniti Integrated Solutions Ltd | 05/2007 |
| 0345 124 | Allocated | Affiniti Integrated Solutions Ltd | 05/2007 |
| 0345 125 | Allocated | Affiniti Integrated Solutions Ltd | 05/2007 |
| 0345 126 | Allocated | Affiniti Integrated Solutions Ltd | 05/2007 |
| 0345 127 | Allocated | Affiniti Integrated Solutions Ltd | 05/2007 |
| 0345 128 | Allocated | Affiniti Integrated Solutions Ltd | 05/2007 |
| 0345 129 | Allocated | Affiniti Integrated Solutions Ltd | 05/2007 |
| 0345 130 | Allocated | TalkTalk Communications Limited | 07/2008 |
| 0345 131 | Allocated | InTechnology Plc | 06/2007 |
| 0345 132 | Protected | - | - |
| 0345 133 | Protected | - | - |
| 0345 134 | Protected | - | - |
| 0345 135 | Protected | - | - |
| 0345 136 | Allocated | TalkTalk Communications Limited | 07/2008 |
| 0345 137 | Protected | - | - |
| 0345 138 | Protected | - | - |
| 0345 139 | Protected | - | - |
| 0345 140 | Allocated | Virgin Media Wholesale Limited | 10/2009 |
| 0345 141 | Allocated | Virgin Media Wholesale Limited | 10/2009 |
| 0345 142 | Allocated | Virgin Media Wholesale Limited | 10/2009 |
| 0345 143 | Allocated | Virgin Media Wholesale Limited | 10/2009 |
| 0345 144 | Allocated | Virgin Media Wholesale Limited | 10/2009 |
| 0345 145 | Allocated | Virgin Media Wholesale Limited | 10/2009 |
| 0345 146 | Allocated | Virgin Media Wholesale Limited | 10/2009 |
| 0345 147 | Allocated | Virgin Media Wholesale Limited | 10/2009 |
| 0345 148 | Allocated | Virgin Media Wholesale Limited | 10/2009 |
| 0345 149 | Allocated | Virgin Media Wholesale Limited | 10/2009 |
| 0345 150 | Protected | - | - |
| 0345 151 | Allocated | Virgin Media Wholesale Limited | 10/2009 |
| 0345 152 | Protected | - | - |
| 0345 153 | Protected | - | - |
| 0345 154 | Allocated | Magrathea Telecommunications Limited | 02/2012 |
| 0345 155 | Allocated | Virgin Media Wholesale Limited | 10/2009 |
| 0345 156 | Protected | - | - |
| 0345 157 | Protected | - | - |
| 0345 158 | Protected | - | - |
| 0345 159 | Protected | - | - |
| 0345 160 | Protected | - | - |
| 0345 161 | Allocated | BT | 06/2010 |
| 0345 162 | Allocated | Affiniti Integrated Solutions Ltd | 02/2009 |
| 0345 163 | Allocated | Core Telecom Limited | 11/2011 |
| 0345 164 | Allocated | Affiniti Integrated Solutions Ltd | 05/2007 |
| 0345 165 | Allocated | Affiniti Integrated Solutions Ltd | 05/2007 |
| 0345 166 | Allocated | Affiniti Integrated Solutions Ltd | 05/2007 |
| 0345 167 | Protected | - | - |
| 0345 168 | Allocated | Affiniti Integrated Solutions Ltd | 05/2007 |
| 0345 169 | Protected | - | - |
| 0345 170 | Allocated | Budget Numbers Ltd | 01/2009 |
| 0345 171 | Protected | - | - |
| 0345 172 | Allocated | TalkTalk Communications Limited | 04/2014 |
| 0345 173 | Protected | - | - |
| 0345 174 | Allocated | Telecom2 Ltd | 10/2009 |
| 0345 175 | Protected | - | - |
| 0345 176 | Allocated | Oxygen8 Communications UK Limited | 01/2008 |
| 0345 177 | Allocated | Premium O Limited | 06/2011 |
| 0345 178 | Protected | - | - |
| 0345 179 | Allocated | TalkTalk Communications Limited | 04/2014 |
| 0345 180 | Allocated | Premium O Limited | 06/2011 |
| 0345 181 | Protected | - | - |
| 0345 182 | Protected | - | - |
| 0345 183 | Allocated | Calltracks Limited | 12/2007 |
| 0345 184 | Allocated | TalkTalk Communications Limited | 07/2008 |
| 0345 185 | Protected | - | - |
| 0345 186 | Protected | - | - |
| 0345 187 | Allocated | Gamma Telecom Holdings Ltd | 07/2013 |
| 0345 188 | Protected | - | - |
| 0345 189 | Allocated | TalkTalk Communications Limited | 07/2008 |
| 0345 190 | Allocated | Nexus Telecommunications Limited | 07/2007 |
| 0345 191 | Protected | - | - |
| 0345 192 | Allocated | Proton Telecom Limited | 09/2008 |
| 0345 193 | Allocated | Citrus Telecommunications Ltd | 07/2007 |
| 0345 194 | Allocated | TalkTalk Communications Limited | 07/2008 |
| 0345 195 | Withdrawn | - | - |
| 0345 196 | Allocated | Virgin Media Limited | 07/2008 |
| 0345 197 | Protected | - | - |
| 0345 198 | Allocated | QX Telecom Ltd | 03/2013 |
| 0345 199 | Allocated | TalkTalk Communications Limited | 07/2008 |