But thegate at Srirampur - on Assam's border with the neighbouring state of West Bengal - does not have a microchip reader so many of the elephants could be taken out undetected.
Among the millions of names and numbers online are prime minister Harold McMillan at his cottage in Chelwood Gate, composer Edward Elgar at his estate in Warwickshire and writer Evelyn Waugh at the home in theWest Country where he wrote Brideshead Revisited.