Tra cứu nhà mạng

Viettel:

032, 033, 034, 035, 036, 037, 038, 039, 086, 096, 097, 098

Mobifone:

070, 076, 077, 078, 079, 089, 090, 093

Vinaphone:

081, 082, 083, 084, 085, 088, 091, 094

Vietnamobile:

056, 058, 092

Gmobile:

059, 099