| Value | Category |
|---|---|
| 101 | Nairobi |
| 201 | Nyandarua |
| 202 | Nyeri |
| 203 | Kirinyaga |
| 204 | Muranga |
| 205 | Kiambu |
| 301 | Mombasa |
| 302 | Kwale |
| 303 | Kilifi |
| 304 | Tana river |
| 305 | Lamu |
| 306 | Taita taveta |
| 401 | Marsabit |
| 402 | Isiolo |
| 403 | Meru |
| 404 | Tharaka |
| 405 | Embu |
| 406 | Kitui |
| 407 | Machakos |
| 408 | Makueni |
| 501 | Garissa |
| 502 | Wajir |
| 503 | Mandera |
| 601 | Siaya |
| 602 | Kisumu |
| 603 | Homa bay |
| 604 | Migori |
| 605 | Kisii |
| 606 | Nyamira |
| 701 | Turkana |
| 702 | West pokot |
| 703 | Samburu |
| 704 | Trans-nzoia |
| 705 | Baringo |
| 706 | Uasin gishu |
| 707 | Elgeyo/marakwet |
| 708 | Nandi |
| 709 | Laikipia |
| 710 | Nakuru |
| 711 | Narok |
| 712 | Kajiado |
| 713 | Kericho |
| 714 | Bomet |
| 801 | Kakamega |
| 802 | Vihiga |
| 803 | Bungoma |
| 804 | Busia |