AskKaka lists the STD code of Kathdol that is 07770. Kathdol is a part of Chhattisgarh and the ISO code of Chhattisgarh state is CT.
Kathdol STD code aka subscriber trunk dialing code is 07770 which is mentioned above on this page of AskKaka. We are great resource of finding Kathdol std code of Chhattisgarh (CT).
Useful Info :-
Please take a note that if you are in India and dialing a landline number of Kathdol then you will have to dial STD code 07770 as a prefix followed by the phone number of a landline user and if you are calling Kathdol's phone number from a foreign country then you need to add +91 (the country code) followed by 7770, e.g. +917770 (no need to add "0" as prefix) followed by the landline phone number.
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