With military tension ratcheting up rapidly in Pakistan and India, civilian air activity has already been affected. International and regional aircraft transiting the two countries airspace use MWARA (Major World Air Route Area) HF frequencies when they are out of VHF/UHF range for ATC purposes. The main MWARA frequency group covering Pakistani and Indian air space are the Middle East 2 (MID-2) and Southeast Asia 1 (SEA-1) MWARA family of frequencies.
Here are the main frequencies and stations in the MID-2 and SEA-1 MWARAs to monitor (all freqs are in kHz and mode is USB:
Chennai ACC/FIC India (SEA-1): 2872 3470 5670 6583 6655 8861 8909 10036 11285 13318
Delhi ACC/FIC India (MID-1): 2872 3467 5580 5601 5658 8906 8948 10018 13288
Lahore ACC Pakistan (MID-1): 3467 5601 5658 10018
Karachi ACC Pakistan (MID-1): 2923 3467 5601 5658 10018 13288
Kolkata (ex-Calcutta) ACC/FIC India (SEA-1): 2872 2823 2947 3470 3491 5484 5580 6556 6583 8861 8906 8948 10066 13318
Mumbai (ex-Bombay) ACC/FIC India (MID-1): 2872 3467 5601 5658 6655 8879 8909 8948 10018 10084 13288
Mumbai (ex-Bombay) RDARA 6E: 6661