This page contains information about which telephone companies the various 01212 numbers are allocated to.
| First Digits | Status | Communications Provider | Number Length | Notes | Change |
|---|---|---|---|---|---|
| 0121 200 | Allocated | BT | 3+7 | - | 15/07/1994 |
| 0121 201 | Allocated | Inclarity Communications Ltd | 3+7 | F-Digit '0,1,2,3,4,5,6,7' | 18/02/2011 |
| 0121 202 | Allocated | Vodafone Ltd (YC) | 3+7 | - | 28/01/1998 |
| 0121 203 | Allocated | InTechnology Plc | 3+7 | F-Digit '2' | 07/06/2007 |
| 0121 204 | Allocated | Vodafone Ltd (YC) | 3+7 | - | 08/08/2003 |
| 0121 205 | Allocated | TalkTalk Communications Limited | 3+7 | - | 19/04/2004 |
| 0121 206 | Allocated | Vodafone Ltd (YC) | 3+7 | - | 01/07/2004 |
| 0121 207 | Allocated | Swiftnet Ltd | 3+7 | - | 07/07/2004 |
| 0121 208 | Allocated | Vodafone Ltd (C&W) | 3+7 | F-Digits 0,1,2,3,4,5,6,7,8,9' | 18/02/2010 |
| 0121 209 | Allocated | Danemere Street Creative | 3+7 | - | 27/10/2004 |
| 0121 210 | Allocated | Verizon UK Ltd | 3+7 | - | 12/07/1999 |
| 0121 211 | Allocated | Starcomm Ltd | 3+7 | - | 25/06/2001 |
| 0121 212 | Allocated | BT | 3+7 | - | 15/07/1994 |
| 0121 213 | Allocated | Virgin Media Wholesale Limited | 3+7 | - | 28/10/2009 |
| 0121 214 | Allocated | BT | 3+7 | - | 15/07/1994 |
| 0121 215 | Allocated | Virgin Media Limited | 3+7 | - | 29/05/2002 |
| 0121 216 | Allocated | Virgin Media Wholesale Limited | 3+7 | F-Digit '0,1,2,3,4,5,6,7,8,9' | 12/10/2011 |
| 0121 217 | Allocated | Daisy Communications Ltd | 3+7 | - | 13/11/2000 |
| 0121 218 | Allocated | British Sky Broadcasting Limited | 3+7 | F-Digits '0,1,2,3,4,5,6,7,8,9' | 15/02/2001 |
| 0121 219 | Allocated | Icron Network Limited | 3+7 | - | 07/08/2006 |
| 0121 220 | Allocated | Virgin Media Limited | 3+7 | - | 14/01/1998 |
| 0121 221 | Allocated | Vodafone Ltd (YC) | 3+7 | - | 06/04/2004 |
| 0121 222 | Allocated | Affiniti Integrated Solutions Ltd | 3+7 | - | 04/11/1998 |
| 0121 223 | Allocated | TalkTalk Communications Limited | 3+7 | F-Digit '0-9' | 29/06/2006 |
| 0121 224 | Allocated | Vodafone Ltd (C&W) | 3+7 | F-Digits 0,1,2,3,4,5,6,7,8,9' | 04/02/2010 |
| 0121 225 | Allocated | TG Support Limited | 3+7 | - | 05/07/2006 |
| 0121 226 | Allocated | Vodafone Ltd (Thus) | 3+7 | - | 03/02/2004 |
| 0121 227 | Allocated | Gamma Telecom Holdings Ltd | 3+7 | F-Digits '0,1,2,3,4,5,6,7' | 04/08/2004 |
| 0121 228 | Allocated | X-Pilot Limited | 3+7 | F-Digit '0' | 29/07/2004 |
| 0121 229 | Allocated | Invomo Ltd | 3+7 | - | 30/01/2008 |
| 0121 230 | Allocated | BT | 3+7 | - | 15/07/1994 |
| 0121 231 | Allocated | Easynet Enterprise Services Limited | 3+7 | - | 07/03/2005 |
| 0121 232 | Allocated | BT | 3+7 | - | 15/07/1994 |
| 0121 233 | Allocated | BT | 3+7 | - | 15/07/1994 |
| 0121 234 | Allocated | BT | 3+7 | - | 15/07/1994 |
| 0121 235 | Allocated | Need More Time Ltd | 3+7 | F-Digit '0' | 17/07/2007 |
| 0121 236 | Allocated | BT | 3+7 | - | 15/07/1994 |
| 0121 237 | Allocated | BT | 3+7 | - | 15/07/1994 |
| 0121 238 | Allocated | TalkTalk Communications Limited | 3+7 | F-Digit '8' | 01/02/2002 |
| 0121 239 | Allocated | Linear Telecoms Limited | 3+7 | F-Digit '0' | 04/10/2010 |
| 0121 240 | Allocated | Virgin Media Wholesale Limited | 3+7 | - | 28/10/2009 |
| 0121 241 | Allocated | Virgin Media Wholesale Limited | 3+7 | - | 28/10/2009 |
| 0121 242 | Allocated | Virgin Media Wholesale Limited | 3+7 | - | 28/10/2009 |
| 0121 243 | Allocated | Virgin Media Wholesale Limited | 3+7 | - | 28/10/2009 |
| 0121 244 | Allocated | Virgin Media Wholesale Limited | 3+7 | - | 28/10/2009 |
| 0121 245 | Allocated | Virgin Media Wholesale Limited | 3+7 | - | 28/10/2009 |
| 0121 246 | Allocated | Virgin Media Wholesale Limited | 3+7 | - | 28/10/2009 |
| 0121 247 | Allocated | Virgin Media Wholesale Limited | 3+7 | - | 28/10/2009 |
| 0121 248 | Allocated | Virgin Media Wholesale Limited | 3+7 | - | 28/10/2009 |
| 0121 249 | Allocated | Virgin Media Wholesale Limited | 3+7 | - | 28/10/2009 |
| 0121 250 | Allocated | Virgin Media Wholesale Limited | 3+7 | - | 28/10/2009 |
| 0121 251 | Allocated | Virgin Media Wholesale Limited | 3+7 | - | 28/10/2009 |
| 0121 252 | Allocated | BT | 3+7 | - | 15/07/1994 |
| 0121 253 | Allocated | BT | 3+7 | - | 11/08/1994 |
| 0121 254 | Allocated | BT | 3+7 | - | 12/11/1996 |
| 0121 255 | Allocated | BT | 3+7 | - | 27/01/1997 |
| 0121 256 | Allocated | Virgin Media Wholesale Limited | 3+7 | - | 28/10/2009 |
| 0121 257 | Allocated | Virgin Media Wholesale Limited | 3+7 | - | 28/10/2009 |
| 0121 258 | Allocated | Virgin Media Wholesale Limited | 3+7 | - | 28/10/2009 |
| 0121 259 | Allocated | Edge Telecom Limited | 3+7 | - | 03/05/2004 |
| 0121 260 | Allocated | COLT Technology Services | 3+7 | - | 01/10/1998 |
| 0121 261 | Allocated | IV Response Limited | 3+7 | - | 04/07/2005 |
| 0121 262 | Allocated | BT | 3+7 | - | 15/07/1994 |
| 0121 263 | Allocated | Griffin Information Systems Ltd | 3+7 | - | 08/06/2005 |
| 0121 264 | Allocated | Digitech Solutions Global Limited | 3+7 | - | 06/09/2010 |
| 0121 265 | Allocated | BT | 3+7 | - | 15/07/1994 |
| 0121 266 | Allocated | Vodafone Ltd (YC) | 3+7 | - | 06/04/2004 |
| 0121 267 | Allocated | Nowtel UK Ltd | 3+7 | - | 21/12/2005 |
| 0121 268 | Allocated | Coms.Com Ltd | 3+7 | - | 13/02/2006 |
| 0121 269 | Allocated | Tipicall Limited | 3+7 | F-Digits '01,2,3,4' | 23/10/2014 |
| 0121 270 | Allocated | Gamma Telecom Holdings Ltd | 3+7 | F-Digits '0,1,2,3,4,5,6,7,8,9' | 04/12/2002 |
| 0121 271 | Allocated | VoiceHost Limited | 3+7 | F-Digit '0' | 30/06/2010 |
| 01212 72 | Protected | - | 3+7 | - | - |
| 0121 273 | Allocated | Virgin Media Limited | 3+7 | F-Digit '1,4,5' | 09/06/2006 |
| 0121 274 | Allocated | BT | 3+7 | - | 18/01/2007 |
| 0121 275 | Allocated | Vodafone Ltd (Energis) | 3+7 | - | 26/05/2006 |
| 0121 276 | Allocated | Orange | 3+7 | - | 15/07/1994 |
| 0121 277 | Allocated | Six Degrees Unified Comms Limited | 3+7 | F-Digit '4' | 13/04/2005 |
| 0121 278 | Allocated | Vodafone Ltd (C&W) | 3+7 | F-Digits 0,1,2,3,4,5,6,7,8,9' | 04/02/2010 |
| 0121 279 | Allocated | TelNG Limited | 3+7 | F-Digit '2' | 26/02/2007 |
| 0121 280 | Allocated | Six Degrees Unified Comms Limited | 3+7 | F-Digit '1' | 20/05/2004 |
| 0121 281 | Allocated | COLT Technology Services | 3+7 | - | 29/08/2001 |
| 0121 282 | Allocated | Served Up Limited. | 3+7 | - | 03/06/2008 |
| 0121 283 | Allocated | Nextec (UK) Limited | 3+7 | F-Digit '3' | 25/11/2013 |
| 0121 284 | Allocated | Localphone Limited | 3+7 | F-Digit '0' | 24/04/2007 |
| 0121 285 | Allocated | Telephony Services Limited | 3+7 | - | 01/11/2004 |
| 0121 286 | Allocated | Vodafone Ltd (C&W) | 3+7 | F-Digits 0,1,2,3,4,5,6,7,8,9' | 22/02/2010 |
| 0121 287 | Allocated | Net Solutions Europe Limited | 3+7 | - | 18/11/2005 |
| 0121 288 | Allocated | Vodafone Ltd (C&W) | 3+7 | F-Digits 0,1,2,3,4,5,6,7,8,9' | 22/02/2010 |
| 0121 289 | Allocated | Frontier Systems Ltd | 3+7 | F-Digit '3' | 27/07/2007 |
| 0121 290 | Allocated | Numbers Telecom Limited | 3+7 | F-Digit '0' | 12/07/2012 |
| 0121 291 | Allocated | British Sky Broadcasting Limited | 3+7 | F-Digit '0,1,2,3,4,5,6,7,8,9' | 29/08/2012 |
| 0121 292 | Allocated | AVCOne Ltd | 3+7 | - | 17/10/2012 |
| 0121 293 | Allocated | TalkTalk Communications Limited | 3+7 | F-Digit '8' | 16/10/2012 |
| 0121 294 | Allocated | British Sky Broadcasting Limited | 3+7 | F-Digit '0,1,2,3,4,5' | 24/01/2013 |
| 0121 295 | Allocated | COLT Technology Services | 3+7 | - | 05/03/2013 |
| 0121 296 | Allocated | BT | 3+7 | - | 12/03/2013 |
| 0121 297 | Allocated | TelecomEight Network Ltd | 3+7 | F-Digit '1' | 14/03/2013 |
| 0121 298 | Allocated | XoverX Ltd | 3+7 | F-Digit '0' | 25/04/2013 |
| 0121 299 | Allocated | Cirrus Response Limited | 3+7 | F-Digit '0' | 10/01/2013 |