| SABC | D/DE | Status | Date | Communications Provider | Number Length | Change | Notes |
| 1225 | 00-10 | Protected | (0)+10 | ||||
| 1225 | 11 | Free for National Dialling Only | (0)+10 | ||||
| 1225 | 12&13 | Protected | (0)+10 | ||||
| 1225 | 14 | Allocated | Telewest Communications Plc | (0)+10 | 03/2001 | ||
| 1225 | 15-19 | Protected | (0)+10 | ||||
| 1225 | 20 | Allocated | Cable & Wireless Plc | 4+6 | 10/2005 | ||
| 1225 | 21 | Allocated | Syntec UK Ltd | 4+6 | 11/2005 | ||
| 1225 | 22 | Allocated | T.T.N.C. Limited | 4+6 | 01/2006 | F-digit 5 | |
| 1225 | 23 | Allocated | Net Solutions Europe Limited | 4+6 | 11/2005 | ||
| 1225 | 24 | Allocated | FleXtel Limited | 4+6 | 11/2005 | ||
| 1225 | 25 | Allocated | PlusNet PLC | 4+6 | 10/2005 | ||
| 1225 | 26 | Allocated | Skycom Ltd | 4+6 | 02/2006 | F-digit 2 | |
| 1225 | 27 | Allocated | Danemere Street Creative | 4+6 | 06/2006 | F digit 2 | |
| 1225 | 28 | Allocated | Teleasp.Net Limited | 4+6 | 11/2005 | ||
| 1225 | 29 | Allocated | Wavecrest (UK) Ltd | 4+6 | 11/2005 | ||
| 1225 | 30 | Allocated | BT | 4+6 | 11/1998 | ||
| 1225 | 31-33 | Allocated | BT | 4+6 | 07/1994 | ||
| 1225 | 34-39 | Allocated | Telewest Communications Plc | 4+6 | 04/1995 | ||
| 1225 | 40 | Allocated | Telewest Communications Plc | 4+6 | 07/1994 | ||
| 1225 | 41 | Allocated | Evoxus Limited | 4+6 | 06/2003 | ||
| 1225 | 42 | Allocated | BT | 4+6 | 07/1994 | ||
| 1225 | 43 | Allocated | Gamma Telecom Holdings Ltd | 4+6 | 02/2004 | ||
| 1225 | 44 | Allocated | BT | 4+6 | 07/1994 | ||
| 1225 | 45 | Allocated | Cable & Wireless Plc | 4+6 | 07/1994 | ||
| 1225 | 46-49 | Allocated | BT | 4+6 | 07/1994 | ||
| 1225 | 50 | Allocated | TG Support Limited | 4+6 | 07/2006 | ||
| 1225 | 51 | Allocated | Inclarity plc | 4+6 | 01/2003 | ||
| 1225 | 52 | Allocated | Global Crossing (UK) Ltd | 4+6 | 09/1999 | ||
| 1225 | 53 | Allocated | Ready Technology Limited | 4+6 | 04/2006 | F-digit 3 | |
| 1225 | 54 | Allocated | Thus Plc | 4+6 | 03/2000 | ||
| 1225 | 55 | Allocated | ntl Group Ltd | 4+6 | 01/1998 | ||
| 1225 | 56 | Allocated | Affiniti Integrated Solutions Ltd | 4+6 | 06/1998 | ||
| 1225 | 57 | Allocated | mixed operators | 4+6 | 09/2006 | ||
| 1225 | 58 | Allocated | Telephony Services Limited | 4+6 | 11/2004 | ||
| 1225 | 59 | Allocated | Easynet Group Plc | 4+6 | 05/2006 | F-digit 0 | |
| 1225 | 60 | Allocated | Citrus Telecommunications Ltd | 4+6 | 03/2006 | ||
| 1225 | 61 | Allocated | Coulomb Limited | 4+6 | 04/2005 | ||
| 1225 | 62 | Allocated | Danemere Street Creative | 4+6 | 10/2004 | ||
| 1225 | 63 | Protected | 4+6 | ||||
| 1225 | 64 | Allocated | Switch Services Ltd | 4+6 | 09/2005 | ||
| 1225 | 65 | Allocated | Interweb Design Ltd | 4+6 | 01/2005 | ||
| 1225 | 66 | Protected | 4+6 | ||||
| 1225 | 67 | Allocated | VTL (UK) Limited | 4+6 | 05/2005 | ||
| 1225 | 68 | Allocated | Pipemedia Ltd | 4+6 | 08/2005 | ||
| 1225 | 69 | Allocated | Freshtel UK Limited | 4+6 | 09/2005 | ||
| 1225 | 70-72 | Allocated | BT | 4+6 | 07/1994 | ||
| 1225 | 73 | Allocated | Cable & Wireless Plc | 4+6 | 07/1994 | ||
| 1225 | 74-79 | Allocated | BT | 4+6 | 07/1994 | ||
| 1225 | 80 | Allocated | Magrathea Telecommunications Limited | 4+6 | 09/2004 | ||
| 1225 | 81-89 | Allocated | BT | 4+6 | 07/1994 | ||
| 1225 | 90 | Allocated | TELSTRA EUROPE LIMITED | 4+6 | 12/2005 | ||
| 1225 | 91 | Allocated | Coms Ltd | 4+6 | 05/2006 | F-Digit 3 | |
| 1225 | 92-97 | Protected | 4+6 | ||||
| 1225 | 98 | Allocated | Spitfire Network Services Ltd | 4+6 | 06/2006 | F-Digit 7 | |
| 1225 | 99 | Protected | N/A |