This page contains information about which telephone companies the various 03301 numbers are allocated to.
| First Digits | Status | Communications Provider | Change |
|---|---|---|---|
| 0330 100 | Allocated | Vodafone Ltd (Energis) | 03/2007 |
| 0330 101 | Allocated | Content Guru Ltd | 11/2007 |
| 0330 102 | Allocated | Vodafone Ltd (Energis) | 03/2011 |
| 0330 103 | Allocated | Digital Select Limited | 02/2013 |
| 0330 104 | Allocated | Talk.to FZC | 02/2014 |
| 0330 105 | Allocated | Pure-IP Limited | 03/2014 |
| 0330 106 | Free | - | - |
| 0330 107 | Free | - | - |
| 0330 108 | Free | - | - |
| 0330 109 | Free | - | - |
| 0330 110 | Allocated | Colloquium Ltd | 09/2008 |
| 0330 111 | Allocated | Core Telecom Limited | 05/2007 |
| 0330 112 | Allocated | Connexon Telecom Inc | 01/2009 |
| 0330 113 | Free | - | - |
| 0330 114 | Free | - | - |
| 0330 115 | Allocated | Global Telecall Limited | 05/2011 |
| 0330 116 | Free | - | - |
| 0330 117 | Free | - | - |
| 0330 118 | Free | - | - |
| 0330 119 | Allocated | iHub UK Ltd | 04/2009 |
| 0330 120 | Allocated | Sipcentric Ltd | 06/2014 |
| 0330 121 | Allocated | Fluency Communications Ltd | 09/2013 |
| 0330 122 | Allocated | Simwood eSMS Limited | 07/2010 |
| 0330 123 | Allocated | BT | 03/2007 |
| 0330 124 | Allocated | BT | 01/2013 |
| 0330 125 | Free | - | - |
| 0330 126 | Allocated | Square1 Communications Limited | 09/2014 |
| 0330 127 | Free | - | - |
| 0330 128 | Free | - | - |
| 0330 129 | Free | - | - |
| 0330 130 | Allocated | i-Net Communications Group Plc | 07/2012 |
| 0330 131 | Allocated | IPPlus (UK) Limited | 04/2014 |
| 0330 132 | Allocated | Lycatel (Ireland) Limited | 08/2013 |
| 0330 133 | Allocated | Buzz Networks Limited | 02/2012 |
| 0330 134 | Allocated | Affiniti Integrated Solutions Ltd | 06/2014 |
| 0330 135 | Free | - | - |
| 0330 136 | Free | - | - |
| 0330 137 | Free | - | - |
| 0330 138 | Free | - | - |
| 0330 139 | Free | - | - |
| 0330 140 | Allocated | BT | 10/2013 |
| 0330 141 | Allocated | BT | 10/2013 |
| 0330 142 | Allocated | BT | 02/2014 |
| 0330 143 | Allocated | BT | 02/2014 |
| 0330 144 | Reserved | Withheld | - |
| 0330 145 | Reserved | Withheld | - |
| 0330 146 | Reserved | Withheld | - |
| 0330 147 | Reserved | Withheld | - |
| 0330 148 | Reserved | Withheld | - |
| 0330 149 | Reserved | Withheld | - |
| 0330 150 | Allocated | Vodafone Ltd (C&W) | 05/2014 |
| 0330 151 | Allocated | Vodafone Ltd (C&W) | 05/2014 |
| 0330 152 | Allocated | Vodafone Ltd (C&W) | 05/2014 |
| 0330 153 | Allocated | Vodafone Ltd (C&W) | 05/2014 |
| 0330 154 | Allocated | Vodafone Ltd (C&W) | 06/2014 |
| 0330 155 | Allocated | Vodafone Ltd (C&W) | 06/2014 |
| 0330 156 | Allocated | Vodafone Ltd (C&W) | 06/2014 |
| 0330 157 | Allocated | Vodafone Ltd (C&W) | 06/2014 |
| 0330 158 | Allocated | Vodafone Ltd (C&W) | 06/2014 |
| 0330 159 | Allocated | Vodafone Ltd (C&W) | 06/2014 |
| 0330 160 | Allocated | Syntec Limited | 11/2011 |
| 0330 161 | Allocated | Level 3 Communications UK Limited | 03/2014 |
| 0330 162 | Free | - | - |
| 0330 163 | Free | - | - |
| 0330 164 | Free | - | - |
| 0330 165 | Free | - | - |
| 0330 166 | Allocated | Odyssey Systems Ltd | 09/2011 |
| 0330 167 | Free | - | - |
| 0330 168 | Free | - | - |
| 0330 169 | Free | - | - |
| 0330 170 | Free | - | - |
| 0330 171 | Free | - | - |
| 0330 172 | Free | - | - |
| 0330 173 | Free | - | - |
| 0330 174 | Free | - | - |
| 0330 175 | Free | - | - |
| 0330 176 | Free | - | - |
| 0330 177 | Free | - | - |
| 0330 178 | Free | - | - |
| 0330 179 | Free | - | - |
| 0330 180 | Allocated | (aq) Limited trading as aql | 09/2007 |
| 0330 181 | Free | - | - |
| 0330 182 | Free | - | - |
| 0330 183 | Free | - | - |
| 0330 184 | Free | - | - |
| 0330 185 | Free | - | - |
| 0330 186 | Free | - | - |
| 0330 187 | Free | - | - |
| 0330 188 | Allocated | Hannon Telecom Voice | 01/2014 |
| 0330 189 | Free | - | - |
| 0330 190 | Free | - | - |
| 0330 191 | Free | - | - |
| 0330 192 | Free | - | - |
| 0330 193 | Free | - | - |
| 0330 194 | Free | - | - |
| 0330 195 | Free | - | - |
| 0330 196 | Free | - | - |
| 0330 197 | Free | - | - |
| 0330 198 | Free | - | - |
| 0330 199 | Free | - | - |