The list includes a code for the town Aranyaprathet (เทศบาลเมืองอรัญญประเทศ) in the province Prachinburi (2597) marked as obsolete with an asterisk, and another one in Sa Kaeo (2798). Therefore the system of municipality codes starting with 99 must have been adopted before 1993 already, the year when Sa Kaeo province was established. The capital towns for the other provinces created in 1993 were only sanitary districts which had no codes, so Aranyaprathet is the only proof for this dating.
In Udon Thani, there are two subdistrict municipalities named Nong Phai (เทศบาลตำบลหนองไผ่), one in Mueang Udon hani district and one in Nong Han district. The table does not include the districts but only gives the names and the numbers, so it's not possible to identify which one got the 4167 and which one the 4168.
Now to the real strange case. In Lopburi the code 1687, marked as obsolete or inactive by the asterisk, refers to the subdistrict municipality Nong Muang (เทศบาลตำบลหนองม่วง). However I suspect it does not refer to the former sanitary district upgraded in 1999, as that already has the code 1693, but instead to the TAO Nong Muang (องค์การบริหารส่วนตำบลหนองม่วง). Maybe it was planned to upgraded that one, but in fact it never was till today.
In Roi Et it even has three names showing up twice, and here the explanation with the TAO eponymous with the municipality does not work. The three cases are:
- At Samat (เทศบาลตำบลอาจสามารถ) - the real one has the code 4583, the asterisked duplicate one the 4582. This still could also refer to the TAO At Samat (องค์การบริหารส่วนตำบลอาจสามารถ) however.
- Dong Daeng (เทศบาลตำบลดงแดง) - the real one has the code 4573, the asterisked duplicate one the 4567. This municipality was upgraded from a TAO in 2008, so there is no second one entity Dong Daeng.
- Khok Lam (เทศบาลตำบลโคกล่าม) - the real one has the code 4574, the asterisked duplicate one the 4568. Same as for Dong Daeng, it was upgraded from a TAO in 2008.
As already mentioned, for Nakhon Ratchasima all of the possible codes are already used, and there still a lot of TAO upgraded in 2008 which have no number assigned. So they must create a new coding scheme for the municipalities.
And finally, the list includes the Sakha Tambon (something I still have no idea about) as well as the planned new districts I found earlier, only those for Chiang Mai I did not include into my lists before. And interestingly, these four district names in Chiang Mai made me discover some other interesting new stuff, which will be topic of a new posting.