Telephone numbers beginning with 01705 belong to the Portsmouth charge group.
The following numbers are local calls to and from this charge group:
01243
01329
01489
01730
01983
The following numbers are regional calls to and from this charge group:
01202
01252
01256
01264
01420
01425
01428
01590
01703
01725
01794
01798
01903
01962
All other calls are national calls.
Warning: these numbers are being replaced by 023 numbers.