Jammu and Kashmir Bank is a type of private sector bank. It was established in the year 1938. It’s headquarter is located in Srinagar, Jammu and Kashmir, India.
Its services are
Consumer Banking
Corporate Banking
Financial Services
Private Banking
Cash Management
Mobile Banking

As you have asked about the J&K Bank South Extension branch in Delhi, I am giving you info about that

Bank: THE JAMMU AND KASHMIR BANK LTD


Address: SOUTH EXTENSIONE-9, SOUTH EXTENSION, PART II, NEW DELHI

State: DELHI

District: DELHI

Branch: SOUTH EXTENSION

Contact: 011-26258850

IFSC Code: JAKA0SEXTEN (used for RTGS, IMPS and NEFT transactions)

Branch Code: Last six characters of IFSC Code represent Branch code.

MICR Code: 110051014

You can also check from J&K Bank website.

Log in to J&K bank website

Scroll down and at right hand side you will find Branch Locator option, select
state as Delhi in it, the new page open look like




Now select the name of branch in “Select a Branch” option and result will be displayed.