| Isa, Nigeria | Sokoto State | Nigeria | — | 883101 |
| Kaduna | Kaduna State | Nigeria | 1,582,102 | 800211, 800212, 800213, 800214, 800221, 800241, 800242, 800243, 800244, 800245, 800246, 800247, 800251, 800252, 800261, 800262, 800263, 800264, 800265, 800266, 800271, 800272, 800273, 800281, 800282, 800283 |
| Kano | Kano State | Nigeria | 3,626,068 | 671101, 700105, 700213, 700222, 700281 |
| Sokoto | Sokoto State | Nigeria | 563,861 | 840101, 840213, 840221, 840223, 840224, 840231, 840232, 840233, 840234, 840241, 840242, 840243, 840244, 840245, 840252, 840253, 840261, 840271, 840272, 840281, 840282, 840283 |
| Zaria | Kaduna State | Nigeria | 975,153 | 810211, 810212, 810221, 810222, 810223, 810224, 810225, 810231, 810232, 810241, 810251, 810253, 810254, 810281, 810282 |