select entry in Code column to view full DE allocations in that range
| Code | DEF | Operator | Use | Notes |
| 1130, 1131 | Leeds National Dialling | 3 Digit Area Code | ||
| 1132, 1133 | Leeds | 3 Digit Area Code | ||
| 1134, 1135, 1136, 1137 | Leeds expansion | 3 Digit Area Code | ||
| 1138 | Leeds | 3 Digit Area Code | ||
| 1139 | Leeds expansion | 3 Digit Area Code | ||
| 1140, 1141 | Sheffield National Dialling | 3 Digit Area Code | ||
| 1142, 1143, 1144 | Sheffield | 3 Digit Area Code | ||
| 1145, 1146, 1147, 1148, 1149 | Sheffield expansion | 3 Digit Area Code | ||
| 1150, 1151 | Nottingham National Dialling | 3 Digit Area Code | ||
| 1152, 1153, 1154, 1155, 1156 | Nottingham expansion | 3 Digit Area Code | ||
| 1157, 1158, 1159 | Nottingham | 3 Digit Area Code | ||
| 1160, 1161 | Leicester National Dialling | 3 Digit Area Code | ||
| 1162, 1163, 1164 | Leicester | 3 Digit Area Code | ||
| 1165, 1166, 1167, 1168, 1169 | Leicester expansion | 3 Digit Area Code | ||
| 1170, 1171 | Bristol National Dialling | 3 Digit Area Code | ||
| 1172, 1173 | Bristol | 3 Digit Area Code | ||
| 1174, 1175, 1176, 1177, 1178 | Bristol expansion | 3 Digit Area Code | ||
| 1179 | Bristol | 3 Digit Area Code | ||
| 1180, 1181 | Reading National Dialling | 3 Digit Area Code | ||
| 1182 | Reading expansion | 3 Digit Area Code | ||
| 1183, 1184 | Reading | 3 Digit Area Code | ||
| 1185, 1186, 1187, 1188 | Reading expansion | 3 Digit Area Code | ||
| 1189 | Reading | 3 Digit Area Code | ||
| 1190, 1191, 1192, 1193, 1194, 1195, 1196, 1197, 1198, 1199 | Geographic - unassigned |