+63-77-(0000000...9999999): Batac, Ilocos Norte Baca lebih lanjut mengenai +63-77-(0000000...9999999)
+63-77-(2193000...2193999): Laoag City, Ilocos Norte (ILN) Baca lebih lanjut mengenai +63-77-(2193000...2193999)
+63-77-(2300000...2309999): Dingras, Ilocos Norte (ILN) Baca lebih lanjut mengenai +63-77-(2300000...2309999)
+63-77-(2310000...2319999): Vintar, Ilocos Norte (ILN) Baca lebih lanjut mengenai +63-77-(2310000...2319999)
+63-77-(2320000...2329999): San Nicolas, Ilocos Norte (ILN) Baca lebih lanjut mengenai +63-77-(2320000...2329999)
+63-77-(2330000...2339999): Bacarra, Ilocos Norte (ILN) Baca lebih lanjut mengenai +63-77-(2330000...2339999)
+63-77-(2350000...2359999): Laoag City, Ilocos Norte (ILN) Baca lebih lanjut mengenai +63-77-(2350000...2359999)
+63-77-(2360000...2369999): Badoc, Ilocos Norte (ILN) Baca lebih lanjut mengenai +63-77-(2360000...2369999)
+63-77-(2370000...2379999): Paoay, Ilocos Norte (ILN) Baca lebih lanjut mengenai +63-77-(2370000...2379999)
+63-77-(2380000...2389999): Pasuquin, Ilocos Norte (ILN) Baca lebih lanjut mengenai +63-77-(2380000...2389999)
