Microsoft (Nasdaq: MSFT) paid Nortel $7.5 million for a block of increasingly scarce Internet Protocol addresses.

Domain Tech reported the news Thursday, citing a court filing.

The price of $11.25 each for the 666,624 IP addresses means they cost more tha domain names, Domain Tech said.

The IP addresses were among the few still available and are held in private hands, according to ICANN, the agency that controls Internet naming. They are IPv4 addresses.

Microsoft won the bidding for the addresses from among four bidders, Domain Tech said.

Nortel sold the addresses as part of its bankruptcy liquidation.

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