After NDA lost the elections in 2004, Vajpayee as caretaker prime minister, asked his office to request the Urban Development ministry to re-number his bungalow.
The earlier request was to change the number from 8 to lucky 7-A. But since the bungalows were even and odd numbered on both sides of Krishna Menon Marg, 6-A was ultimately chosen.
The RTI response also confirms that there are no rules and guidelines for such arbitrary change of government bungalows for personal choice of occupants.