1st Block Extension is a locality within Horamavu, Bengaluru North Zone, Bengaluru. 1st Block Extension has a pincode of 560043. Nearby localities of 1st Block Extension include 1st Block Extension, Ashirvad Colony, Munireddy Layout, Jayanti Nagar, Kallumantapa, Vijaya Bank Colony, Bank Avenue Colony, Babusapalya, Vijaya Bank Colony Extension, Amar Regency Layout, Coconut Grove Layout, Nanjappa Garden, Horamavu Banaswadi, Chikka Nanjunda Reddy Layout, B.Y. Narayana Reddy Layout, Nandanam Colony, Papaiah Layout