S Digit 1/2 List, SA=17
national numbers starting 170
(SAB=170)
national numbers starting 171
(SAB=171) Geographic - unassigned (formerly London Inner Area, National Dialling), Geographic - unassigned (formerly London Inner Area)
national numbers starting 172
(SAB=172)
national numbers starting 173
(SAB=173)
national numbers starting 174
(SAB=174)
national numbers starting 175
(SAB=175)
national numbers starting 176
(SAB=176)
national numbers starting 177
(SAB=177)
national numbers starting 178
(SAB=178)
national numbers starting 179
(SAB=179)