Đầu số các mạng
Mobifone
090...093...0120..0121...0122
...0126...0128
Vinaphone
091...094...0123...0124...0125
...0127...0129
Viettel
097...098...0163...0164...0165
...0166...0167...0168...0169
S-fone
095
Vietnamobile
092...0188
EVN Telecom
096
Beeline
0199...099